Requirement Specifications for Level-2 Parameters Required Stored or Derived by The Near Earth Asteroid Rendezvous (NEAR) X-Ray Spectrometer (XRS) Ground System Irina Mikheeva (UA) and Tim McClanahan (GSFC) Revision 1.5: May 25, 2001 (This text file has a complete set of associated TIF files, one for each page of the original WORD document. Pointers given below identify the associated files that capture the figures, equations, or tables not shown in this file.) Table of Contents A. Introduction and Purpose..............................................1 B. The UA-LPL Ground Processing Environment..............................2 C. Description of NEAR GRS Data File Standards...........................3 D. Fractional Footprint Accounting.......................................5 E. Listings of Parameters for XRS Level-2 Integral Records...............5 E.1-E.4. NEAR XRS Spectra............................................5 E.5. NEAR XRS Science Housekeeping (SCI HK) Parameters...........6 E.6. NEAR XRS Engineering Housekeeping (ENG HK) Parameters.......7 E.7. NEAR XRS Derived Engineering (DER ENG) Parameters..........10 E.8. NEAR XRS Spatial (SPATIAL) Parameters......................11 E.9. NEAR XRS Solar (SOLAR) Parameters..........................12 F. Listings of Parameters for XRS Level-2 Summary Record................12 F.1-F.8. NEAR XRS Summarized Spectra................................12 F.9. NEAR XRS Summarized Engineering (ENGINEERING) Parameters...13 F.10. NEAR XRS Summarized Spatial (SPATIAL) Parameters...........14 F.11. NEAR XRS Summarized Solar (SOLAR) Parameters...............14 G. Listings of Parameters for XRS Fractional Footprint Accounting System...............................................................14 H. Numerical Specifications for XRS Level-2 Integral Records............15 H.1-H.4. NEAR XRS Spectra...........................................15 H.5. NEAR XRS Science Housekeeping (SCI HK) Parameters..........15 H.6. NEAR XRS Engineering Housekeeping (ENG HK) Parameters......15 H.7. NEAR XRS Derived Engineering (DER ENG) Parameters..........15 H.8. NEAR XRS Spatial (SPATIAL) Parameters......................17 H.9. NEAR XRS Solar (SOLAR) Parameters..........................23 I. Numerical Specifications for XRS Level-2 Summary Record..............25 I.1-I.8. NEAR XRS Summarized Spectra............................... 25 I.9. NEAR XRS Summarized Engineering (ENGINEERING) Parameters...28 I.10. NEAR XRS Summarized Spatial (SPATIAL) Parameters...........31 I.11. NEAR XRS Summarized Solar (SOLAR) Parameters...............36 J. Numerical Specifications for XRS Fractional Footprint Accounting System...............................................................36 APPENDIX 1. Definitions for: Collimator_Fct; Spatial_Fluorescence_Norm; Angular_Fluor_Fct; Total_Weight_Fluor; Spatial_Scattering_Norm; Angular_Scatter_Fct; Total_Weight_Scatt.....................39 APPENDIX 2. Approximations for: Collimator_Fct; Angular_Fluor_Fct; Angular_Scatter_Fct; FOV_Status.............................43 APPENDIX 3 Location of XRS Level-2 Parameters in the U of A Database....................................................45 NEAR XRS Requirements Specs Revision Notes..............................57 NEAR XRS Glossary and Acronym List......................................59 A. Introduction and Purpose The following document will act as one part of a two part requirement specification for all Level-2 parameters required to be stored, or derived by the Near Earth Asteroid Rendezvous (NEAR) X-ray and Gamma-Ray spectrometer ground systems (XGRS). It will relate specifically to the X-Ray spectrometer (XRS) requirements. The document will act as a primary common reference for both NEAR X-ray and Gamma-ray spectrometer (XGRS) science team members, systems development staff and future users of these data. The goal is to assist in the development and understanding of parameters defined as key to the Level-2 NEAR XGRS science objectives. A primary data server residing at the University of Arizona, Lunar and Planetary Laboratory (UA-LPL) is designated with the function of deriving and serving these mission critical parameters during cruise and encounter phases of the NEAR mission scheduled from February 1996 through February 2001. The intent of the first level product is to include all NEAR XRS mission critical information needed for asteroid mapping, health of instrument, control, and science analysis systems. Level -2 products will include integral spectral data in either raw or instrument calibrated format. Bundled with the spectral data products will be scientific housekeeping and engineering housekeeping data sampled by the XGRS instrumentation at the same time as the integral spectra onboard the spacecraft. This information is then telemetered through NASA's Deep Network (DSN) managed by the Jet Propulsion Laboratory in Pasadena, California, and NEAR related telemetry is forwarded to the Applied Physics Laboratory (APL). The Level-0 XGRS raw spectral and engineering data is then broken out of the NEAR mission specific data stream and stored online at the APL Science Data Center (SDC). These data are stored in the Hierarchical Data Format (HDF) file standard. Theses files are then picked up by the automated (UA-LPL) data processing ingest system. Figure 1.0 NEAR XGRS OPERATIONAL FLOW OF INFORMATION (See file XRS_REQS_7_2_004.TIF for the figure) B. The UA-LPL Ground Processing Environment The core of the UA-LPL data processing system (Figure 2.0) consists of a Sybase Relational Database (UA-RDBMS) that stores tables of NEAR XGRS raw spectral, science housekeeping, engineering housekeeping, derived engineering and spatial data products. XRS and GRS data processing systems are logically partitioned into separate processing environments on the UA-LPL server. A scientific data processing system has been developed around the UA-RDBMS to provide automated data ingest and science team interaction. Critical spatial and derived engineering data products are generated either at ingest time or query time. Core query time processing options include calibration and summation processing, compression and bundling of query results for return to the scientific user community over the Internet file transfer protocol (FTP). Figure 2.0 NEAR XGRS Ground Processing System at the UA-LPL (See file XRS_REQS_7_2_005.TIF for the figure) UA-LPL database ingest systems automatically monitor the APL SDC for new and updated postings of XGRS data sets. These file sets are recovered via the file transfer protocol (FTP) to the UA-LPL data system. Raw spectral and engineering data products are then loaded into XGRS RDBMS tables with Mission Elapsed Time (MET) acting as the primary key for database access. Mission Elapsed Time is used with spacecraft ephemeris data (SPICE system, APL Science Data Center and JPL/NASA Ancillary Information Facility) to derive spatial data products. Spacecraft navigation and pointing information is converted to SPICE data for the NEAR XGRS ground system and will be generated by participating scientists at APL/SDC. Software systems have been developed at the UA-LPL and GSFC to generate both spatial and derived engineering products. These products will then be maintained within the UA-RDBMS database system. At Goddard Space Flight Center participating scientists will be charged with monitoring instrument health, calibration, and bad flagging systems. A feedback system is employed to move derived information to on-line ingest processes at the UA-RDBMS. The calibration system will be used to convert spectral data products to a common energy standard specified at query time. Calibration processing is optionally selected at query time. Bad flagging information is generated during instrument health checks as a function of identification of problem (MET) record sets. These (MET)'s are forwarded to the UA-LPL RDBMS for tagging. Query time summation processes will be used to sum multple integral record sets into a single output record. This record will include one spectrum per spectral classification and selected engineering products. Summed output will generally be specific to regional coverage and science analysis. The primary motivation for summation processing is to limit large volume network transfers incurred in this distributed processing environment. Results are then accumulated in the Xternal Data Representation (XDR) binary file standard (Sun Microsystems) then compressed, bundled and forwarded to the query initiator. C. Description of NEAR XRS Data File Standards In the NEAR XRS data processing system there are 3 data file standards possible for output. These different file standards reflect the different UA-LPL ground processes selectable at query time. Output format type is selected at query time through the UA-LPL WWW query interface. Integral raw XRS products will be used primarily in the calibration, instrument health and mission planning activities. Calibrated data will be used primarily in the science analysis activity. Formats for the three record standards are as follows. FORMAT 1: XRS Integral Raw: Figure 3a (See file XRS_REQS_7_2_006.TIF for the figure) FORMAT 2: XRS Integral Calibrated: Figure 3b (See file XRS_REQS_7_2_006.TIF for the figure) Nomenclature for XRS integral data products: FORMATS 1 and 2 (Calibrated and Raw) Nomenclature for XRS integral data products: FORMATS 1 and 2 (Calibrated and Raw) x(yyyy)(ddd)(hh)(mm)(ss).xdr Example: x1998234010159.xdr There currently is no planned calibration processing for the integral XRS data products. This may have an impact on the total number of parameters in the derived engineering sections of the XRS integral records. NEAR XRS Summation Processing: (Format 3) The NEAR XRS data processing ground system is a distributed system that currently spans institutions in the United States and Europe. The summation processing system has been specified to render potentially very large volumes of data (> Gbytes) returned from a single query down to a single summary record. The intention of summation processing will be to minimize the per query network data transfer size (bytes), by rendering a single summed spectrum from a relationally defined set. Correlated parameters will be bundled with this summed set. The summation ground processing step will be supported only on calibrated spectral data products. Both Solar detector types (GAS PC and PIN) will be returned by the summation query and selected parameters will be summarized in the Format 3 product standard. FORMAT 3: XRS Summed: Figure 3c (See file XRS_REQS_7_2_007.TIF for the figure) Nomenclature for XRS integral data products: FORMATS 3 (Summed) y(yyyy)(ddd)(hh)(mm)(ss).xdr Example: y1998234010159.xdr Summation processing will be query specific and all derived engineering tracking is done internal to each query process. All (XDR) file sets returned from the query will be run through the summation processing system. Integral calibrated spectra will be summed into single XRS specific output sets. Selected engineering and spatial parameters are also averaged into values representative of the parameter over the range of output (MET) records and specific to each query. Parameter rendering algorithms are listed in the numerical specifications (Section I). D. Fractional Footprint Accounting The 433Eros asteroid is highly irregular in shape and deviates significantly from a spherical geometry. A system was developed by NEAR XGRS staff to partition the virtual 433Eros asteroid into surface regions (bins) of roughly equal surface area, not based on spherical geometry. The bin system is internal to the UA-RDBMS ground processing system. Individual spectral accumulations will most likely span multiple asteroid surface bins. This system will be used to discriminate and identify the applicability of integral footprints, based on their fractional coverage of the asteroid surface bin being queried. During UA-RDBMS ingest processing each integral footprint will be broken down into a set of records, one bin record for each bin subtended by the footprint. The current plan does not include the possibility of using the fractional footprint as a weighting function when automatically summing spectral data at query time. The fractional footprint accounting will be used as a query time threshold criteria for inclusion of the integral MET to summation processing. Figure 4.0 Fractional Footprint (See file XRS_REQS_7_2_008.TIF for the figure) A query time specification requesting all integrations (MET records) from Bin C with a fractional footprint area >= 0.4 would return the example integration and others whose fractional coverage are at least 0.4. Information related to the bin processing is included in sections G and J. E. Listings of Parameters for XRS Level-2 Integral Records FORMATS 1,2 - List of RDBMS parameters for Single Raw and Calibrated XRS Level-2 record (output) E.1. - E.4. NEAR XRS Spectra: 4 spectra*256 channels*(Real*4) 0 - 255 Unfiltered spectrum (UNF) 0 - 255 Mg filtered spectrum (MG) 0 - 255 Al filtered spectrum (AL) 0 - 255 Solar spectrum (proportional counter GAS_PC or PIN) (SOLAR_SP) E.5. NEAR XRS Science Housekeeping (SCI HK) Parameters: 53*(Integer*4) The following parameters are described in detail in the NEAR XGRS DPU Software Requirements Specification JHU/APL Version 7 7358-9002. Version 7 of the software was uploaded in May 1999. 0 MET (Mission Elapsed Time) Primary Key to RDBMS 1 EPHEMERIS_TIME 2 DQI - Data Quality Indicator 3 TIME_TAG 4 UNF_MON_INTEG_TIME 5 MG_MON_INTEG_TIME 6 AL_MON_INTEG_TIME 7 ACTV_SOL_MON_INTEG_TIME 8 UNF_XRAY_1_SAFE_FLG 9 MG_XRAY_1_SAFE_FLG 10 AL_XRAY_1_SAFE_FLG 11 GAS_XRAY_1_SAFE_FLG 12 PIN_XRAY_1_SAFE_FLG 13 UNF_XRAY_2_SAFE_FLG 14 MG_XRAY_2_SAFE_FLG 15 AL_XRAY_2_SAFE_FLG 16 GAS_XRAY_2_SAFE_FLG 17 PIN_XRAY_2_SAFE_FLG 18 UNF_XRAY_OVERFLOW_FLG 19 MG_XRAY_OVERFLOW_FLG 20 AL_XRAY_OVERFLOW_FLG 21 ACTIVE_XRAY_OVERFLOW_FLG 22 UNF_XRAY_RAW_EVENT_RATE 23 MG_XRAY_RAW_EVENT_RATE 24 AL_XRAY_RAW_EVENT_RATE 25 GAS_XRAY_RAW_EVENT_RATE 26 PIN_XRAY_RAW_EVENT_RATE 27 UNF_XRAY_VALID_EVENTS 28 MG_XRAY_VALID_EVENTS 29 AL_XRAY_VALID_EVENTS 30 GAS_XRAY_VALID_EVENTS Version 7 31 UNF_XRAY_EVENTS_REJ_BY_RT 32 MG_XRAY_EVENTS_REJ_BY_RT 33 AL_XRAY_EVENTS_REJ_BY_RT 34 GAS_XRAY_EVENTS_REJ_BY_RT 35 PIN_SOLAR_PROCESS_EVENT Version 7 36 XTALK_COUNTER Version 7 37 CMD_OPCODE Version 7 38 CMD_ARGUMENT Version 7 39 CMDS_RECEIVED Version 7 40 PROBLEM_COUNTER Version 7 41 PROBLEM_CODE Version 7 42 UNF_XRAY_DC_OFFSET Downlinked value. No conversion to energy bins is performed. ( no devision by 8 as required by NEAR XFRS DPU Software Requirement Specifications JHU/APL 7358-9002 Version 7) 43 MG_XRAY_DC_OFFSET - " - 44 AL_XRAY_DC_OFFSET - " - 45 GAS_XRAY_DC_OFFSET - " - 46 PIN_DC_OFFSET - " - 47 UNF_STAND_DEV - " - 48 MG_STAND_DEV - " - 49 AL_STAND_DEV - " - 50 GAS_STAND_DEV - " - 51 PIN_STAND_DEV - " - 52 XRAY_DATA_QUALITY_BIT Version 7 E.6. NEAR XRS Engineering Housekeeping (ENG HK) Parameters: 163*(REAL*4) The following parameters are described in detail in the NEAR XGRS DPU Software Requirements Specification JHU/APL Version 7 7358-9002. Version 7 of the software was uploaded in May 1999. The Gamma -Ray Spectrometer ENG_HK paramaters (0:137) are identical to the XRS, but sampled at the GRS sample rate. 0 DETECTOR_ELECTR_CURR 1 XRAY_PIN_DIODE_FET_BIAS 2 HVCE_TEMPERATURE 3 UNF_XRAY_HVPS_VOLT 4 MG_XRAY_HVPS_VOLT 5 AL_XRAY_HVPS_VOLT 6 XRAY_GAS_HVPS_VOLT 7 XRAY_PIN_HVPS_VOLT 8 NAI_HVPS_VOLT 9 BGO_HVPS_VOLT 10 DPU_DC_DC_TEMP 11 XGRS_DC_DC_TEMP 12 UNF_XRAY_HVPS_TEMP 13 MG_XRAY_HVPS_TEMP 14 AL_XRAY_HVPS_TEMP 15 XRAY_GAS_HVPS_TEMP 16 XRAY_PIN_HVPS_TEMP 17 NAI_HVPS_TEMP 18 BGO_HVPS_TEMP 19 TEC_CURRENT 20 NAI_HVPS_VOLT_CMD 21 BGO_HVPS_VOLT_CMD 22 UNF_HVPS_VOLT_CMD 23 MG_HVPS_VOLT_CMD 24 AL_HVPS_VOLT_CMD 25 HVPS_POWER_ON_OFF 26 XRAY_CALIB_HOME_FLG 27 XRAY_CALIB_MOTOR_ON_OFF 28 XRAY_CALIB_MOTOR_ENABLE 29 GAS_HVPS_VOLT_CMD 30 PIN_HVPS_VOLT_CMD 31 GAMMA_RAY_HEATER_CURR 32 Spare0 33 XRAY_CALIB_MOTOR_DIR 34 XRAY_CALIB_MOTOR_CURR 35 XRAY_CALIB_MOTOR_GOAL 36 XRAY_CALIB_MOTOR_POS 37 XRAY_CALIB_MOTOR_FID_SENS 38 XRAY_CALIB_MOTOR_FID_BRIT 39 XRAY_MOTOR_IN_CALIB_POSITION 40 XRAY_MOTOR_IN_NORM_POSITION 41 ACTIVE_SOLAR_TOGGLE_MODE 42 XRAY_CALIB_MAX_STEPS 43 Spare1 44 TEC_ENABLE 45 XRAY_CALIB_CUM_MOTOR_STPS 46 GRAY_BURST_THRESH_VAL 47 XRAY_SAFING_THRESH 48 XRAY_CALIB_MOTOR_DIAG 49 TEC_POWER_ON_OFF 50 TEC_MODE 51 TEC_COOL_HEAT_FLG 52 TEC_TEMPERATURE 53 TEC_COOL_MODE_TEMP_UP_LMT 54 TEC_COOL_MODE_TEMP_LOW_LMT 55 TEC_HEAT_MODE_TEMP_UP_LMT 56 TEC_HEAT_MODE_TEMP_LOW_LMT 57 GAMMA_RAY_TEMP_HYSTERESIS 58 GAMMA_RAY_HEAT_TEMP_LOW_LMT 59 FULL_GAMMA_RAY_SCIENCE_MODE 60 FULL_XRAY_SCIENCE_MODE 61 SUMM_GRAY_XRAY_SCIENCE_MODE 62 GRAY_BURST_SCI_REC_MODE 63 HVCE_TEMP_SET_POINT 64 CMDED_END_XRAY_INTEG_PER 65 CMDED_GAMMA_RAY_INTEG_PER 66 BGO_PROTON_FLARE_FLG 67 GAMMA_RAY_BIN_OVER_FLG_CMD 68 UNF_XRAY_BIN_OVER_FLG_CMD 69 MG_BIN_OVER_FLG_CMD 70 AL_BIN_OVER_FLG_CMD 71 ACT_BIN_OVER_FLG_CMD 72 NAI_BIN_OVERFLOW_FLG 73 BGO_BIN_OVERFLOW_FLG 74 NAI_ANTICOIN_OVERFLOW_FLG 75 NAI_SING_ESC_OVERFLOW_FLG 76 NAI_DOUB_ESC_OVERFLOW_FLG 77 BGO_SING_ESC_OVERFLOW_FLG 78 BGO_DOUB_ESC_OVERFLOW_FLG 79 UNF_XRAY_BIN_OVERFLOW_FLG 80 MG_BIN_OVERFLOW_FLG 81 AL_BIN_OVERFLOW_FLG 82 ACT_BIN_OVERFLOW_FLG 83 GAMMA_RAY_HEAT_ON_OFF 84 GAMMA_RAY_HEAT_MODE 85 BGO_LEVEL_1_SAFING_FLG 86 BGO_LEVEL_2_SAFING_FLG 87 Spare3 88 XRAY_INTEGR_TIME 89 HVPS_ON_OFF 90 PIN_SENSOR_MASK_FLG 91 GAS_SENSOR_MASK_FLG 92 AL_SENSOR_MASK_FLG 93 MG_SENSOR_MASK_FLG 94 UNF_SENSOR_MASK_FLG 95 BGO_SENSOR_MASK_FLG 96 NAI_SENSOR_MASK_FLG 97 UNF_XRAY_RISE_TIME_THRESH 98 MG_RISE_TIME_THRESH 99 AL_RISE_TIME_THRESH 100 GAS_RISE_TIME_THRESH 101 UNF_RISE_TIME_VALID_THRESH Downlinked value. No ground conversion specified in NEAR XFRS DPU Software Requirements Specifications JHU/APL 7358-9002 Version 7 is performed. 102 MG_RISE_TIME_VALID_THRESH - " - 103 AL_RISE_TIME_VALID_THRESH - " - 104 GAS_RISE_TIME_VALID_THRESH - " - 105 GAMMA_RAY_INTEGR_TIME 106 GAMMA_SING_ESC_WIND_CENTER - " - 107 GAMMA_SING_ESC_WIND_WIDTH 108 GAMMA_DOUB_ESC_WIND_CENTER - " - 109 GAMMA_DOUB_ESC_WIND_WIDTH 110 NAI_LOW_LEVEL_AMPL_THRESH Ground conversion is: (downlinked value * 3.413 + 3.0), which is different from specified in NEAR XFRS DPU Software Requirements Specifications JHU/APL 7358-9002 Version 7 111 BGO_LOW_LEVEL_AMPL_THRESH - " - 112 UNF_LOW_LEVEL_AMPL_THRESH 113 MG_LOW_LEVEL_AMPL_THRESH 114 AL_LOW_LEVEL_AMPL_THRESH 115 GAS_LOW_LEVEL_AMPL_THRESH 116 PIN_LOW_LEVEL_AMPL_THRESH 117 GAMMA_RAY_SENSOR_TEMP 118 NAI_LEVEL_1_SAFING_FLG 119 UNF_LEVEL_1_SAFING_FLG 120 MG_LEVEL_1_SAFING_FLG 121 AL_LEVEL_1_SAFING_FLG 122 GAS_LEVEL_1_SAFING_FLG 123 PIN_LEVEL_1_SAFING_FLG 124 NAI_LEVEL_2_SAFING_FLG 125 UNF_LEVEL_2_SAFING_FLG 126 MG_LEVEL_2_SAFING_FLG 127 AL_LEVEL_2_SAFING_FLG 128 GAS_LEVEL_2_SAFING_FLG 129 PIN_LEVEL_2_SAFING_FLG 130 XRAY_SENS_SAFING_REST_LEVEL 131 GAMMA_SENS_SAFING_REST_LEVEL 132 XRAY_SAFING_REST_MAX_RETRY 133 GAMMA_SAFING_REST_MAX_RETRY 134 GAMMA_HEATER_DUTY_CYCLE 135 GAMMA_SENS_SAFING_THRESH 136 HVPS_CURRENT 137 BGO_PROTON_FLARE_THRESH 138 VERSION_NUMBER Version 7 139 CLEAR_SPECTRUM_0 Version 7 140 CLEAR_HW_RAW Version 7 141 CLEAR_HW_RISE_TIME_REJECT Version 7 142 CLEAR_FALSE_RISE_TIME_REJECT Version 7 143 CLEAR_TRUE_RISE_TIME_REJECT Version 7 144 CLEAR_HIGH_ENERGY Version 7 145 MG_SPECTRUM_0 Version 7 146 MG_HW_RAW Version 7 147 MG_HW_RISE_TIME_REJECT Version 7 148 MG_FALSE_RISE_TIME_REJECT Version 7 149 MG_TRUE_RISE_TIME_REJECT Version 7 150 MG_HIGH_ENERGY Version 7 151 AL_SPECTRUM_0 Version 7 152 AL_HW_RAW Version 7 153 AL_HW_RISE_TIME_REJECT Version 7 154 AL_FALSE_RISE_TIME_REJECT Version 7 155 AL_TRUE_RISE_TIME_REJECT Version 7 156 AL_HIGH_ENERGY Version 7 157 SOLAR_SPECTRUM_0 Version 7 158 SOLAR_HW_RAW Version 7 159 SOLAR_HW_RISE_TIME_REJECT Version 7 160 SOLAR_FALSE_RISE_TIME_REJECT Version 7 161 SOLAR_TRUE_RISE_TIME_REJECT Version 7 162 SOLAR_HIGH_ENERGY Version 7 E.7. NEAR XRS Derived Engineering (DER ENG) Parameters: 28*(Real*4), 1*(Integer*4), 4*(Integer*4) These parameters are not stored in the University of Arizona RDBMS but derived at a query time. "Not valid" - is designated as = -1 0 Spare 1 Spare 2 Spare 3 Spare 4 Spare 5 Spare 6 Spare 7 Spare 8 Spare 9 Spare 10 Spare 11 Spare 12 UNF_LIVE_TIME 13 MG_LIVE_TIME 14 AL_LIVE_TIME 15 SOLAR_LIVE_TIME 16 UNF_VALID_CHANNEL_HI 17 MG_VALID_CHANNEL_HI 18 AL_VALID_CHANNEL_HI 19 UNF_VALID_CHANNEL_LOW 20 MG_VALID_CHANNEL_LOW 21 AL_VALID_CHANNEL_LOW 22 UNF_RISE_TIME_CHANNEL 23 MG_RISE_TIME_CHANNEL 24 AL_RISE_TIME_CHANNEL 25 Spare 26 Spare 27 Spare 28 BAD_FLAG 29-32 QUERY_ID E.8. NEAR XRS Spatial (SPATIAL) Parameters: 1*(Integer*4), 38*(Real*4) These parameters are derived in the University of Arizona at the ingest phase. "Not valid" - is designated as = -1 0 METT 1 PLATEID_BORESIGHT_INTERSECT NOT VALID IF FOV_STATUS=0 2 BINID_BORESIGHT_INTERSECT NOT VALID IF FOV_STATUS=0 3 SC_POSITION, X 4 SC_POSITION, Y 5 SC_POSITION, Z 6 BS_VECTOR, X 7 BS_VECTOR, Y 8 BS_VECTOR, Z 9 EARTH_POSITION, X 10 EARTH_POSITION, Y 11 EARTH_POSITION, Z 12 SUN_POSITION, X 13 SUN_POSITION, Y 14 SUN_POSITION, Z 15 FOV_STATUS 16 DOWNLINK_STATUS 17 ANGLE_SUN_SOLAR_MON 18 AVG_SC_DISTANCE NOT VALID IF FOV_STATUS=0 19 SUN_DISTANCE 20 AVG_EMISSION_ANGLE NOT VALID IF FOV_STATUS=0 21 AVG_INCIDENCE_ANGLE NOT VALID IF FOV_STATUS=0,2,4 22 PHASE_ANGLE NOT VALID IF FOV_STATUS=0,2,4 23 AVG_INC_EMI_COS_RATIO NOT VALID IF FOV_STATUS=0,2,4 24 SPATIAL_FLUORESCENCE_NORM =0 IF FOV_STATUS=0,2,4 25 SPATIAL_SCATTERING_NORM =0 IF FOV_STATUS=0,2,4 26 TOTAL_AREA_FOOTPRINT NOT VALID 27 TOTAL_ILLUMINATED_AREA =0 IF FOV_STATUS=0,2,4 28 TOTAL_VISIBLE_AREA =0 IF FOV_STATUS=0 29 TOTAL_EFF_AREA NOT VALID 30 TOTAL_EFF_SOLID_ANGLE =0 IF FOV_STATUS=0 31 FOOTPRINT_SOLID_ANGLE =0 IF FOV_STATUS=0 32 BORESIGHT_INTERSECTION_LAT NOT VALID IF FOV_STATUS=0 33 BORESIGHT_INTERSECTION_LON NOT Valid IF FOV STATUS=0 34 BORESIGHT_INTERSECTION_R NOT VALID IF FOV_STATUS=0 35 SPICE_KERNEL_ID 36 PLATE_MODEL_ID 37 PROCESSING_SOFTWARE_ID 38 DATABASE_VERSION_ID E.9. NEAR XRS Solar (SOLAR) Parameters: 2*(Real*4) 0 SOLAR_INTEGRAL 1 SOLAR_LEVEL F. Listings of Parameters for XRS Level-2 Summary Record FORMAT 3 - List of RDBMS parameters for Summarized XRS Level-2 record (output) F.1. - F.8. NEAR XRS Summarized Spectra: 8 spectra*256 channels*(Real*4) 0 - 255 Unfiltered Calibrated* Summed spectrum with proportional counter GAS_PC active (UNF, GAS_PC) 0 - 255 Mg filtered Calibrated* Summed spectrum with proportional counter GAS_PC active (Mg, GAS_PC) 0 - 255 Al filtered Calibrated* Summed spectrum with proportional counter GAS_PC active (Al, GAS_PC) 0 - 255 GAS_PC Calibrated* Summed spectrum (GAS_PC) 0 - 255 Unfiltered Calibrated* Summed spectrum with proportional counter PIN active (UNF, PIN) 0 - 255 Mg filtered Calibrated* Summed spectrum with proportional counter PIN active (MG, PIN) 0 - 255 Al filtered Calibrated* Summed spectrum with PIN active (AL, PIN) 0 - 255 PIN Calibrated* Summed spectrum (PIN) * Calibration system is not implemented currently F.9. NEAR XRS Summarized Engineering (ENGINEERING) Parameters: 48*(Real*4) 0 Spare 1 Spare 2 Spare 3 Spare 4 Spare 5 Spare 6 TOTAL_INTEG_TIME_UNF_GAS 7 TOTAL_INTEG_TIME_MG_GAS 8 TOTAL_INTEG_TIME_AL_GAS 9 TOTAL_INTEG_TIME_GAS 10 TOTAL_LIVE_TIME_UNF_GAS 11 TOTAL_LIVE_TIME_MG_GAS 12 TOTAL_LIVE_TIME_AL_GAS 13 TOTAL_LIVE_TIME_GAS 14 UNF_VALID_CHANNEL_HI_GAS 15 MG_VALID_CHANNEL_HI_GAS 16 AL_VALID_CHANNEL_HI_GAS 17 UNF_VALID_CHANNEL_LOW_GAS 18 MG_VALID_CHANNEL_LOW_GAS 19 AL_VALID_CHANNEL_LOW_GAS 20 UNF_INVALID_CHANNEL_HI_GAS 21 MG_INVALID_CHANNEL_HI_GAS 22 AL_INVALID_CHANNEL_HI_GAS 23 UNF_INVALID_CHANNEL_LOW_GAS 24 MG_INVALID_CHANNEL_LOW_GAS 25 AL_INVALID_CHANNEL_LOW_GAS 26 NUMBER_MET_GAS 27 TOTAL_INTEG_TIME_UNF_PIN 28 TOTAL_INTEG_TIME_MG_PIN 29 TOTAL_INTEG_TIME_AL_PIN 30 TOTAL_INTEG_TIME_PIN 31 TOTAL_LIVE_TIME_UNF_PIN 32 TOTAL_LIVE_TIME_MG_PIN 33 TOTAL_LIVE_TIME_AL_PIN 34 TOTAL_LIVE_TIME_PIN 35 UNF_VALID_CHANNEL_HI_PIN 36 MG_VALID_CHANNEL_HI_PIN 37 AL_VALID_CHANNEL_HI_PIN 38 UNF_VALID_CHANNEL_LOW_PIN 39 MG_VALID_CHANNEL_LOW_PIN 40 AL_VALID_CHANNEL_LOW_PIN 41 UNF_INVALID_CHANNEL_HI_PIN 42 MG_INVALID_CHANNEL_HI_PIN 43 AL_INVALID_CHANNEL_HI_PIN 44 UNF_INVALID_CHANNEL_LOW_PIN 45 MG_INVALID_CHANNEL_LOW_PIN 46 AL_INVALID_CHANNEL_LOW_PIN 47 NUMBER_MET_PIN F.10. NEAR XRS Summarized Spatial (SPATIAL) Parameters: 17*(Real*4) 0 AVG_SC_DISTANCE_GAS NOT VALID IF FOV_STATUS=0 1 AVG_EMI_ANGLE_GAS NOT VALID IF FOV_STATUS=0 2 AVG_INC_ANGLE_GAS NOT VALID IF FOV_STATUS=0,2,4 3 AVG_PHASE_GAS NOT VALID IF FOV_STATUS=0,2,4 4 AVG_INC_EMI_COS_RATIO_GAS NOT VALID IF FOV_STATUS=0,2,4 5 AVG_EFF_SOLID_ANGLE_GAS =0 IF FOV_STATUS=0 6 TOTAL_WEIGHT_FLUOR_GAS =0 IF FOV_STATUS=0,2,4 7 TOTAL_WEIGHT_SCAT_GAS =0 IF FOV_STATUS=0,2,4 8 AVG_SC_DISTANCE_PIN NOT VALID IF FOV_STATUS=0 9 AVG_EMI_ANGLE_PIN NOT VALID IF FOV_STATUS=0 10 AVG_INC_ANGLE_PIN NOT VALID IF FOV_STATUS=0,2,4 11 AVG_PHASE_PIN NOT VALID IF FOV_STATUS=0,2,4 12 AVG_INC_EMI_COS_RATIO_PIN NOT VALID IF FOV_STATUS=0,2,4 13 AVG_EFF_SOLID_ANGLE_PIN =0 IF FOV_STATUS=0 14 TOTAL_WEIGHT_FLUOR_PIN =0 IF FOV_STATUS=0,2,4 15 TOTAL_WEIGHT_SCAT_PIN =0 IF FOV_STATUS=0,2,4 16 ESTIMATED_COVERED_AREA =0 IF FOV_STATUS=0 F.11. NEAR XRS Summarized Solar (SOLAR) Parameters: 4*(Real*4) 1 AVERAGE_SOLAR_INTEGRAL_GAS 2 SOLAR_INTEGRAL_VARIANCE_GAS 3 AVERAGE_SOLAR_INTEGRAL_PIN 4 SOLAR_INTEGRAL_VARIANCE_PIN G. Listing of Parameters for XRS Fractional Footprint Accounting System Internal to the University of Arizona RDBMS information for accounting purposes only. This information will not be output at the query time. 0 MET INTEGER*4 1 FOOTPRINT_BIN_TOTAL_AREA REAL*4 NOT VALID 2 FOOTPRINT_BIN_ILLUM_AREA REAL*4 =0 IF FOV_STATUS=2,4 3 FOOTPRINT_BIN_VISIBLE_AREA REAL*4 4 FOOTPRINT_BIN_EFF_AREA REAL*4 NOT VALID 5 TOTAL_EFF_SOLID_ANGLE_FRACTION REAL*4 6 SPECTRUM_FRACTION REAL*4 NOT VALID IF FOV_STATUS=2,4 7 BIN_ID REAL*4 H. Numerical Specifications for XRS Level-2 Integral Records FORMATS 1,2 - Numerical specifications for Single Raw and Calibrated XRS Level-2 record (output) H.1. - H.4. NEAR XRS Spectra: 4 spectra*256 channels*(Real*4) The following parameters are described in detail in the NEAR XGRS DPU Software Requirements Specification JHU/APL Version 7 7358-9002. Version 7 of the software was uploaded in May 1999. H.5. NEAR XRS Science Housekeeping (SCI HK) Parameters: 53*(Integer*4) The following parameters are described in detail in the NEAR XGRS DPU Software Requirements Specification JHU/APL Version 7 7358-9002. Version 7 of the software was uploaded in May 1999. H.6. NEAR XRS Engineering Housekeeping (ENG HK) Parameters: 163*(REAL*4) The following parameters are described in detail in the NEAR XGRS DPU Software Requirements Specification JHU/APL Version 7 7358-9002. Version 7 of the software was uploaded in May 1999. H.7. NEAR XRS Derived Engineering (DER ENG) Parameters: 28*(Real*4), 1*(Integer*4), 1*(4*Integer*4) NOTE: *'ed items are pending science team approval and development. PARAMETER NAME UNITS 0 Spare 1 Spare 2 Spare 3 Spare 4 Spare 5 Spare 6 Spare 7 Spare 8 Spare 9 Spare 10 Spare 11 Spare 12 UNF_LIVE_TIME Unitless UNF_LIVE_TIME = UNF_XRAY_VALID_EVENTS(SCI_HK:27)/(UNF_XRAY_RAW_EVENT_RATE(SCI_HK:22) - 0.037 * XTALK_COUNTER(SCI_HK:36)) 13 MG_LIVE_TIME Unitless MG_LIVE_TIME = MG_XRAY_VALID_EVENTS(SCI_HK:28)/(MG_XRAY_RAW_EVENT_RATE(SCI_HK:23)- 0.025 * XTALK_COUNTER(SCI_HK:36)) 14 AL_LIVE_TIME Unitless AL_LIVE_TIME = AL_XRAY_VALID_EVENTS(SCI_HK:29)/(AL_XRAY_RAW_EVENT_RATE(SCI_HK:24)- 0.031 * XTALK_COUNTER(SCI_HK:36)) 15 SOLAR_LIVE_TIME Unitless IF Active Solar Monitor is GAS SOLAR_LIVE_TIME = GAS_XRAY_VALID_EVENTS(SCI_HK:30) / GAS_XRAY_RAW_EVENT_RATE(SCI_HK:25) IF Active Solar Monitor is PIN SOLAR_LIVE_TIME = PIN_SOLAR_PROCESS_EVENTS(SCI_HK:35) / PIN_XRAY_RAW_EVENT_RATE(SCI_HK:26) 16 UNF_VALID_CHANNEL_HI Channel Highest channel of the spectrum in original (no calibration) or new (after calibration) energy scale. =N(253), if N(253)<=255 =255, if N(253)>255, N(253)=253 for non-calibrated spectra. N(253): channel number in the new energy scale, corresponding to 253 channel of the original spectrum, for calibrated spectra. (See file XRS_REQS_7_2_019.TIF for the equation) 17 MG_VALID_CHANNEL_HI - " - - " - " 18 AL_VALID_CHANNEL_HI - " - - " - 19 UNF_VALID_CHANNEL_LOW - " - Lowest channel of the spectrum in original (no calibration) or new (after calibration) energy scale. =N(LLD), if N(LLD)>=0 =0, if N(LLD)<0, N(LLD)=(Eng_HK:112) or 10, whatever is higher, for non-calibrated spectra. N(LLD): channel number in the new energy scale, corresponding to low level discriminator setting of the original spectrum LLD=(Eng_HK:112) or 10, whatever is higher, for calibrated spectra. (See file XRS_REQS_7_2_020.TIF for the equation) 20 MG_VALID_CHANNEL_LOW - " - - " - N(LLD) corresponds to Eng_HK:113 or 10, whatever is higher. 21 AL_VALID_CHANNEL_LOW - " - - " - N(LLD) corresponds to Eng_HK:114 or 10, whatever is higher. 22 UNF_RISE_TIME_CHANNEL - " - Rise time threshold channel in the new (after calibration) energy scale. =N(RT)=(Eng_HK:101) for non-calibrated spectra. =N(RT): channel number in the new energy scale, corresponding to a rise time discriminator setting in the original spectrum (Eng_HK:101), for calibrated spectra. (See file XRS_REQS_7_2_020.TIF for the equation) 23 MG_RISE_TIME_CHANNEL - " - - " - N(RT) corresponds to Eng_HK:102 24 AL_RISE_TIME_CHANNEL - " - - " - N(RT) corresponds to Eng_HK:103 25 Spare 26 Spare 27 Spare 28 BAD_FLAG Provided by GSFC 29-32 QUERY_ID H.8. NEAR XRS Spatial (SPATIAL) Parameters: 1*(Integer*4), 38*(Real*4) All spatial derivations, unless specified differently, are made for the middle of integration period. * ET : ephemeris time corresponding to clock fixed mission elapsed time in the middle of the integration period. Measuring units are seconds before January 1, 2000. PARAMETER NAME UNITS 0 MET Seconds Mission Elapsed Time at start of integration. 1 PlateID_Boresight_Intersect Plate Index ID of the plate that boresight intersects in the middle of integration period 2 BinID_Boresight_Intersect Bin Index ID of the bin that boresight intersects in the middle of integration period 3 SC_Position, X Coord X, km Position of spacecraft (ET*) in Erosfixed 4 SC_Position, Y Coord Y, km coord. system (ET*). 5 SC_Position, Z Coord Z, km 6 BS_Vector, X Vector X, normal Boresight vector of XRS (ET*) in Erosfixed 7 BS_Vector, Y Vector Y, normal coord. system (ET*). (Instr. Pointing Direction) 8 BS_Vector, Z Vector Z, normal 9 Earth_Position, X Coord X, km Position of the Earth (ET*) in Erosfixed 10 Earth_position, Y Coord Y, km coord. system (ET*). 11 Earth_Position, Z Coord Z, km 12 Sun_Position, X Coord X, km Position of the Sun in Erosfixed coord. 13 Sun_Position, Y Coord Y, km system (ET*), corrected for light 14 Sun_Position, Z Coord Z, km time Sun-Eros (ET*- LTSun-Eros) 15 FOV_Status Status value = 0: Field of view (FOV) is completely off the asteroid. = 1: The field of view is totally on the asteroid and at least part of the footprint is lit by the sun. = 2: The field of view is totally on the asteroid and ALL of the plates are dark. (Asteroid darkside) = 3: Part of the field of view is off the asteroid and at least one plate is lit by the sun. = 4: Part of the field of view is off the asteroid and all plates are dark. (Asteroid darkside) For derivation see Appendix 2 16 Downlink_Status Status Value = 0: No downlink = 1: Yes downlink (The angle between antenna direction and vector spacecraft(ET*)--> Earth(ET*) is less than 2 degrees) 17 Angle_Sun_Solar_Mon Degrees Angle between Solar Monitor Normal (ET*) and vector spacecraft(ET*) --> Sun(ET*-LTSun-NEAR) 18 Avg_SC_Distance Kilometers Average distance from the spacecraft to the surface of the asteroid contributing to the spectrum.Approximation for Collimator_Fct can be found in Appendix 2. (See file XRS_REQS_7_2_022.TIF for the equation) 19 Sun_Distance Kilometers Sun_Position vector magnitude. 20 Avg_Emission_Angle Degrees Average emission angle (between normal to the surface and direction from the surface to the spacecraft). Approximation for Collimator_Fct is given in Appendix 2. (See file XRS_REQS_7_2_022.TIF for the equation) 21 Avg_Incidence_Angle Degrees Average incidence angle (between normal to the surface and direction from the surface to the sun). Approximation for Collimator_Fct is given in Appendix 2. (See file XRS_REQS_7_2_023.TIF for the equation) 22 Phase_Angle Degrees Phase angle (between direction from the sun to the surface and direction from the surface to the spacecraft). 23 Avg_Inc_Emi_Cos_Ratio Unitless Average ratio of the cosine of incidence angle to the cosine of emission angle. Approximation for Collimator_Fct is given in Appendix 2. (See file XRS_REQS_7_2_023.TIF for the equation) 24 Spatial_Fluorescence_Norm Steradians Spatial normalization coefficient for fluorescence flux. It relates the fluorescence flux at the detector to the fluorescence intensity from the asteroid surface in the direction normal to the surface under the condition that incidence angle=0. For complete definition see Appendix 1. Approximations for Angular_Fluor_Fct and Collimator_Fct are given in Appendix 2. (See file XRS_REQS_7_2_023.TIF for the equation) 25 Spatial_Scattering_Norm Steradians Spatial normalization coefficient for scattering. It relates the scattering flux at the detector to the intensity of scattering from the asteroid surface under the condition that incidence angle = emission angle = 0 For complete definition see Appendix 1. Approximations for Angular_Scatter_Fct and Collimator_Fct are given in Appendix 2. (See file XRS_REQS_7_2_024.TIF for the equation) 26 Total_Area_Footprint Sq. Kilometers NOT VALID (= -1) 27 Total_Illuminated_Area Sq. Kilometers Total area of plates in the footprint contributing to the spectrum (lit by the sun and visible from the spacecraft) (See file XRS_REQS_7_2_024.TIF for the equation) 28 Total_Visible_Area Sq. Kilometers Total area of plates in the footprint visible from the spacecraft (See file XRS_REQS_7_2_024.TIF for the equation) 29 Total_Eff_Area Sq. Kilometers NOT VALID (= -1) 30 Total_Eff_Solid_Angle Unitless Overall solid angle of all plates in the footprint contributing to the spectrum (lit by the sun and visible from the spacecraft) and weighted by the response function of the collimator, relatively the instrument full field of view. (See file XRS_REQS_7_2_025.TIF for the equation) 31 Footprint_Solid_Angle Unitless Overall solid angle of all plates in the footprint as seen from the spacecraft, relatively the instrument full field of view.* Plate solid angle is modified by plate fraction in FOV (See file XRS_REQS_7_2_025.TIF for the equation) 32 Boresight_Intersection_Lat Degrees Latitude of boresight intersection in the middle of integration period Coordinate transformation Asteroid Body Fixed, Cartesian to Asteroid Body Fixed, Spherical. Intersection point (x,y,z) of boresight with asteroid surface converted to Latitude. LAT = Degrees(ARC_SIN(Z/R)) (R solved for in 34) 33 Boresight_Intersection_Lon Degrees Longitude of boresight intersection the middle of integration period Coordinate transformation Asteroid Body Fixed, Cartesian to Asteroid Body Fixed, Spherical. Intersection point (x,y,z) boresight with asteroid surface converted to Longitude 1. LON = -1.*Degrees(ARC_TAN(Y/X)) 2. LON = 270 for x = 0 AND y > 0 3. LON = 90 for x = 0 AND y < 0 34 Boresight_Intersection_R Kilometers Radius-vector of boresight intersection in the middle of integration period Coordinate transformation Asteroid Body Fixed, Cartesian to Asteroid Body Fixed, Spherical. Intersection point (x,y,z) of boresight with asteroid surface converted to Radius from center of asteroid mass. R = SQRT( X^2 + Y^2 + Z^2) (R is needed in sol'n 32) 35 SPICE_Kernel_ID Version Number Specified by NAIF 36 Plate_Model_ID Version Number 37 Processing_Software_ID Version Number 38 DataBase_Version_ID Version Number H.9. NEAR XRS Solar (SOLAR) Parameters: 2*(Real*4) PARAMETER NAME UNITS 0 SOLAR_INTEGRAL Counts/Second Solar monitor counting rate, corrected for the radiation incidence angle and normalized to 1.4 Astronomical Unit distance to the Sun. Reflects changes in solar x-ray flux. (See file XRS_REQS_7_2_027.TIF for the equation) 1 SOLAR_LEVEL Set correspondingly to 10 solar activity ranges provided by GSFC, Control parameter: (Solar_Integral*300) Takes values 0 .. 9. V = Solar_Integral * 300 For PIN - detector: Example: V values will be modified and subject to change: Dynamically loaded runtime. IF V< 3500 THEN SOLAR_LEVEL = 0 IF V>= 3500 AND V < 5000 THEN SOLAR_LEVEL = 1 IF V>= 5000 AND V < 7000 THEN SOLAR_LEVEL = 2 IF V>= 7000 AND V < 11000 THEN SOLAR_LEVEL = 3 IF V>= 11000 AND V < 20000 THEN SOLAR_LEVEL = 4 IF V>= 20000 AND V < 40000 THEN SOLAR_LEVEL = 5 IF V>= 40000 AND V < 80000 THEN SOLAR_LEVEL = 6 IF V>= 80000 AND V < 200000 THEN SOLAR_LEVEL = 7 IF V>= 200000 AND V < 1750000 THEN SOLAR_LEVEL = 8 IF V>= 1750000 THEN SOLAR_LEVEL = 9 For GAS - detector: IF V< 16000 THEN SOLAR_LEVEL = 0 IF V>= 16000 AND V < 32000 THEN SOLAR_LEVEL = 1 IF V>= 32000 AND V < 63000 THEN SOLAR_LEVEL = 2 IF V>= 63000 AND V < 100000 THEN SOLAR_LEVEL = 3 IF V>= 100000 AND V < 105000 THEN SOLAR_LEVEL = 4 IF V>= 105000 AND V < 120000 THEN SOLAR_LEVEL = 5 IF V>= 120000 AND V < 140000 THEN SOLAR_LEVEL = 6 IF V>= 140000 AND V < 180000 THEN SOLAR_LEVEL = 7 IF V>= 180000 AND V < 1900000 THEN SOLAR_LEVEL = 8 IF V>= 1900000 THEN SOLAR_LEVEL = 9 I. Numerical Specifications for XRS Level-2 Summary Record FORMAT 3 - Numerical specifications for Summarized XRS Level-2 record (output) I.1. NEAR XRS Summarized Unfiltered Spectrum with GAS_PC Active (UNF,GAS_PC): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_028.TIF for the equation) I.2. NEAR XRS Summarized MG Spectrum with GAS_PC Active (MG,GAS_PC): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_029.TIF for the equation) I.3. NEAR XRS Summarized AL Spectrum with GAS_PC Active (AL,GAS_PC): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_029.TIF for the equation) I.4. NEAR XRS Summarized GAS_PC Spectrum (GAS_PC): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_029.TIF for the equation) I.5. NEAR XRS Summarized Unfiltered Spectrum with PIN Active (UNF,PIN): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_029.TIF for the equation) I.6. NEAR XRS Summarized MG Spectrum with PIN Active (MG,PIN): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_030.TIF for the equation) I.7. NEAR XRS Summarized AL Spectrum with PIN active (AL,PIN): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_030.TIF for the equation) I.8. NEAR XRS Summarized PIN Spectrum (PIN): 256 Channels*(Real*4) Measuring units: Counts/Channel (See file XRS_REQS_7_2_030.TIF for the equation) I.9. NEAR XRS Summarized Engineering (ENGINEERING) Parameters: 48*(Real*4) PARAMETER NAME UNITS 0 Spare 1 Spare 2 Spare 3 Spare 4 Spare 5 Spare 6 TOTAL_INTEG_TIME_UNF_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 7 TOTAL_INTEG_TIME_MG_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 8 TOTAL_INTEG_TIME_AL_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 9 TOTAL_INTEG_TIME_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 10 TOTAL_LIVE_TIME_UNF_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 11 TOTAL_LIVE_TIME_MG_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 12 TOTAL_LIVE_TIME_AL_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 13 TOTAL_LIVE_TIME_GAS Seconds (See file XRS_REQS_7_2_031.TIF for the equation) 14 UNF_VALID_CHANNEL_HI_GAS Channel Highest channel of summed spectrum uncorrupted by energy scale adjustments. Lowest UNF_VALID_CHANNEL _HI among all MET records in a sum. (See file XRS_REQS_7_2_031.TIF for the equation) 15 MG_VALID_CHANNEL_HI_GAS Channel - " - Lowest MG_VALID_CHANNEL_HI 16 AL_VALID_CHANNEL_HI_GAS Channel - ' - Lowest AL_VALID_CHANNEL_HI 17 UNF_VALID_CHANNEL_LOW_GAS Channel Lowest channel of summed spectrum uncorrupted by energy scale adjustments or LLD variations. Highest UNF_VALID_CHANNEL_LOW among all MET records in a sum. 18 MG_VALID_CHANNEL_LOW_GAS Channel - ' - Highest MG_VALID_CHANNEL_LOW 19 AL_VALID_CHANNEL_LOW_GAS Channel - ' - Highest AL_VALID_CHANNEL_LOW 20 UNF_INVALID_CHANNEL_HI_GAS Channel Highest channel of rise-time transition region in the summed spectrum formed as a result of energy scale or rise time settings variations. Highest UNF_RISE_TIME_CHANNEL among all MET records in a sum. 21 MG_INVALID_CHANNEL_HI_GAS Channel - ' -Highest MG_RISE_TIME_CHANNEL 22 AL_INVALID_CHANNEL_HI_GAS Channel - ' - Highest AL_RISE_TIME_CHANNEL 23 UNF_INVALID_CHANNEL_LOW_GAS Channel Lowest channel of rise-time transition region in the summed spectrum formed as a result of energy scale or rise time settings variations. Lowest UNF_RISE_TIME_CHANNEL among all MET records in a sum. 24 MG_INVALID_CHANNEL_LOW_GAS Channel - ' - Lowest MG_RISE_TIME_CHANNEL 25 AL_INVALID_CHANNEL_LOW_GAS Channel - ' - Lowest AL_RISE_TIME_CHANNEL 26 Number_MET_GAS Number of MET records in the query when GAS solar monitor was active 27 TOTAL_INTEG_TIME_UNF_PIN Seconds (See file XRS_REQS_7_2_032.TIF for the equation) 28 TOTAL_INTEG_TIME_MG_PIN Seconds (See file XRS_REQS_7_2_032.TIF for the equation) 29 TOTAL_INTEG_TIME_AL_PIN Seconds (See file XRS_REQS_7_2_032.TIF for the equation) 30 TOTAL_INTEG_TIME_PIN Seconds (See file XRS_REQS_7_2_032.TIF for the equation) 31 TOTAL_LIVE_TIME_UNF_PIN Seconds (See file XRS_REQS_7_2_032.TIF for the equation) 32 TOTAL_LIVE_TIME_MG_PIN Seconds (See file XRS_REQS_7_2_032.TIF for the equation) 33 TOTAL_LIVE_TIME_AL_PIN Seconds (See file XRS_REQS_7_2_033.TIF for the equation) 34 TOTAL_LIVE_TIME_PIN Seconds (See file XRS_REQS_7_2_034.TIF for the equation) 35 UNF_VALID_CHANNEL_HI_PIN Channel Highest channel of summed spectrum uncorrupted by energy scale adjustments. Lowest UNF_VALID_CHANNEL_HI among all MET records in a sum. 36 MG_VALID_CHANNEL_HI_PIN Channel - " - Lowest MG_VALID_CHANNEL_HI 37 AL_VALID_CHANNEL_HI_PIN Channel - " - Lowest AL_VALID_CHANNEL_HI 38 UNF_VALID_CHANNEL_LOW_PIN Channel Lowest channel of summed spectrum uncorrupted by energy scale adjustments or LLD variations. Highest UNF_VALID_CHANNEL_LOW among all MET records in a sum. 39 MG_VALID_CHANNEL_LOW_PIN Channel - " - Highest MG_VALID_CHANNEL_LOW 40 AL_VALID_CHANNEL_LOW_PIN Channel - " - Highest AL_VALID_CHANNEL_LOW 41 UNF_INVALID_CHANNEL_HI_PIN Channel Highest channel of rise-time transition region in the summed spectrum formed as a result of energy scale or rise time settings variations.Highest UNF_RISE_TIME_CHANNEL among all MET records in a sum. 42 MG_INVALID_CHANNEL_HI_PIN Channel - ' - Highest MG_RISE_TIME_CHANNEL 43 AL_INVALID_CHANNEL_HI_PIN Channel - ' - Highest AL_RISE_TIME_CHANNEL 44 UNF_INVALID_CHANNEL_LOW_PIN Channel Lowest channel of rise-time transition region in the summed spectrum formed as a result of energy scale or rise time settings variations. Lowest UNF_RISE_TIME_CHANNEL among all MET records in a sum. 45 MG_INVALID_CHANNEL_LOW_PIN Channel - ' - Lowest MG_RISE_TIME_CHANNEL 46 AL_INVALID_CHANNEL_LOW_PIN Channel - ' - Lowest AL_RISE_TIME_CHANNEL 47 Number_MET_PIN Number of MET records in the query when PIN solar monitor was active I.10. NEAR XRS Summarized Spatial (SPATIAL) Parameters: 17*(Real*4) PARAMETER NAME UNITS 0 AVG_SC_DISTANCE_GAS Kilometers Distance from the spacecraft to the surface of the asteroid averaged over MET records in a sum with proportional counter active. (See file XRS_REQS_7_2_034.TIF for the equation) 1 AVG_EMI_ANGLE_GAS Degrees Emission angle averaged over MET records in a sum with proportional counter active. (See file XRS_REQS_7_2_034.TIF for the equation) 2 AVG_INC_ANGLE_GAS Degrees Incidence angle averaged over MET records in a sum with proportional counter active. (See file XRS_REQS_7_2_034.TIF for the equation) 3 AVG_PHASE_GAS Degrees Phase angle averaged over MET records in a sum with proportional counter active. (See file XRS_REQS_7_2_035.TIF for the equation) 4 AVG_INC_EMI_COS_RATIO_GAS Unitless Ratio of cosines of incidence and emission angles averaged over MET records in a sum with proportional counter active. (See file XRS_REQS_7_2_035.TIF for the equation) 5 AVG_EFF_SOLID_ANGLE_GAS Unitless Total effective solid angle averaged over MET records in a sum with proportional counter active (See file XRS_REQS_7_2_035.TIF for the equation) 6 Total_Weight_Fluor_GAS Steradians*Counts Normalization coefficient providing the link between the summed fluorescence spectrum and the intensity of fluorescence from the asteroid surface in the direction normal to the surface under the condition that incidence angle = 0 (for MET's with proportional counter active). For complete definition see Appendix 1. (See file XRS_REQS_7_2_036.TIF for the equation) 7 Total_Weight_Scat_GAS Steradians*Counts Normalization coefficient providing the link between the summed spectrum of scattering and the intensity of scattering from the asteroid surface under the condition that incidence angle = emission angle = half-sum of incidence and emission angles averaged over all MET records participating in the sum (for MET's with proportional counter active). For complete definition see Appendix 1. (See file XRS_REQS_7_2_036.TIF for the equation) 8 AVG_SC_DISTANCE_PIN Kilometers Distance from the spacecraft to the surface of the asteroid averaged over MET records in a sum with PIN monitor active. (See file XRS_REQS_7_2_036.TIF for the equation) 9 AVG_EMI_ANGLE_PIN Degrees Emission angle averaged over MET records in a sum with PIN monitor active. (See file XRS_REQS_7_2_037.TIF for the equation) 10 AVG_INC_ANGLE_PIN Degrees Incidence angle averaged over MET records in a sum with PIN monitor active. (See file XRS_REQS_7_2_037.TIF for the equation) 11 AVG_PHASE_PIN Degrees Phase angle averaged over MET records in a sum with PIN monitor active. (See file XRS_REQS_7_2_037.TIF for the equation) 12 AVG_INC_EMI_COS_RATIO_PIN Unitless Ratio of cosines of incidence and emission angles averaged over MET records in a sum with PIN monitor active. (See file XRS_REQS_7_2_037.TIF for the equation) 13 AVG_EFF_SOLID_ANGLE_PIN Unitless Total effective solid angle averaged over MET records in a sum with PIN monitor active. (See file XRS_REQS_7_2_038.TIF for the equation) 14 Total_Weight_Fluor_PIN Steradians*Counts Normalization coefficient providing the link between the summed fluorescence spectrum and the intensity of fluorescence from the asteroid surface in the direction normal to the surface under the condition that incidence angle = 0 (for MET's with PIN monitor active). For complete definition see Appendix 1. (See file XRS_REQS_7_2_038.TIF for the equation) 15 Total_Weight_Scat_PIN Steradians*Counts Normalization coefficient providing the link between the summed spectrum of scattering and the intensity of scattering from the asteroid surface under the condition that incidence angle = emission angle = half-sum of incidence and emission angles averaged over all MET records participating in the sum (for MET's with PIN monitor active). For complete definition see Appendix 1 (See file XRS_REQS_7_2_038.TIF for the equation) 16 ESTIMATED_COVERED_AREA Sq. Kilometers Estimated area of the asteroid surface covered by MET records in a sum For a spatial query For a temporal query (See file XRS_REQS_7_2_039.TIF for the equation) I.11. NEAR XRS Summarized Solar (SOLAR) Parameters: 4*(Real*4) PARAMETER NAME UNITS 1 Average_Solar_Integral_GAS Counts (See file XRS_REQS_7_2_039.TIF for the equation) 2 Solar_Integral_Variance_GAS Sq. Counts (See file XRS_REQS_7_2_039.TIF for the equation) 3 Average_Solar_Integral_PIN Counts (See file XRS_REQS_7_2_039.TIF for the equation) 4 Solar_Integral_Variance_PIN Sq. Counts (See file XRS_REQS_7_2_039.TIF for the equation) J. Numerical Specifications for XRS Fractional Footprint Accounting System PARAMETER NAME UNITS 0 MET Seconds Mission Elapsed Time at start of integartion 1 Footprint_Bin_Total_Area Sq. Kilometers NOT VALID (= -1) 2 Footprint_Bin_Illum_Area Sq. Kilometers Total area of all plates in the footprint that belong to the bin, contributing into the spectrum (lit by the sun and visible from the spacecraft) Fractions are considered as in H8 param.29 (See file XRS_REQS_7_2_040.TIF for the equation) 3 Footprint_Bin_Visible_Area Sq. Kilometers Total area of all plates in the footprint that belong to the bin, visible from the spacecraft Fractions are considered as in H8 param.28 (See file XRS_REQS_7_2_040.TIF for the equation) 4 Footprint_Bin_Eff_Area Sq. Kilometers NOT VALID (= -1) 5 Total_Eff_Solid_Angle_Fraction Unitless Fraction of the total effective solid angle that can be attributed to the bin. (See file XRS_REQS_7_2_040.TIF for the equation) 6 Spectrum_Fraction Unitless Fraction of the spectrum that can be attributed to the bin. Approximations for Angular_Scatter_Fct and Collimator_Fct are given in Appendix 2. (See file XRS_REQS_7_2_041.TIF for the equation) 7. BINID Number Bin identifier as generated by the Bin definition system. Each bin is unique. APPENDIX 1. Definitions for: Collimator_Fct; Spatial_Fluorescence_Norm; Angular_Fluor_Fct; Total_Weight_Fluor; Spatial_Scattering_Norm; Angular_Scatter_Fct; Total_Weight_Scatt. (See files XRS_REQS_7_2_042-045.TIF for the equations) Angular_Fluor_Fct: Ratio of intensity of fluorescence (photons/(s*sr*cm2surface) from the surface to the intensity of fluorescence from the same surface illuminated with the same solar flux with the incidence angle = 0 in the direction of the normal to the surface (emission angle = 0), which is a weak function of composition, energy and solar activity. Spatial_Fluorescence_Norm: Ratio of the fluorescence flux at the detector (photons/(s*cm2detector) from the whole footprint at given orbital configuration to the intensity of fluorescence from the asteroid surface (photons/(s*sr*cm2surface) under the same solar flux and 0 incidence and emission angles. Angular_Scatter_Fct: Ratio of intensity of scattering (photons/(s*keV*sr*cm2surface) from the surface with a given incidence and emission angles, ? and ?, to the intensity of scattering from the same surface with the incidence angle = emission angle = 0, which is a weak function of composition, energy and solar activity. Spatial_Scattering_Norm: Ratio of the scattering flux at the detector (photons/(s*keV*cm2detector) from the whole footprint at given orbital configuration to the scattering intensity of 1 cm2 of the asteroid surface (photons/(s*keV*sr*cm2surface) under the same solar flux when incidence angle = emission angle = 0. APPENDIX 2. Approximations for: Collimator_Fct; Angular_Fluor_Fct; Angular_Scatter_Fct; FOV_Status 1) Collimator_Fct = 0.97*exp(-0.5*((?-0.02)/1.42)^2)+0.028-0.11*? +0.0256* ?^2, where ?- the angle between the boresight and the vector directed from the spacecraft to the midpoint of the plate. Collimator_Fct = 0, when ??> 3.4 degrees. (See file XRS_REQS_7_2_046.TIF for the figure) Figure 1. Angular response of the XRS collimator; measurements vs. approximation 2) When XRS field of view is represented with the 16 sided polygon if all 16 sides are located on the asteroid FOV_STATUS = 1 or 2 depending on the illumination status. If less than 16 sides are located on the asteroid FOV_STATUS = 3 or 4 depending on the illumination status. If no sides are located on the asteroid FOV_STATUS = 0. 3) Angular_Fluor_Fct and Angular_Scatter_Fct - surfaces: (See file XRS_REQS_7_2_047.TIF for the equation) T(0,0)= 1.00172E+00 T(2,0)=-3.26751E-05 T(4,0)=2.42909E-08 T(0,1)=-5.64297E-04 T(2,1)=-8.04678E-06 T(4,1)=-4.14045E-09 T(0,2)=-1.73585E-05 T(2,2)=7.96751E-07 T(4,2)=4.06218E-10 T(0,3)=-2.17047E-06 T(2,3)=-2.74497E-08 T(4,3)=-1.41884E-11 T(0,4)=3.15083E-08 T(2,4)=4.04218E-10 T(4,4)=2.09849E-13 T(0,5)=-2.18812E-10 T(2,5)=-2.05539E-12 T(4,5)=-1.07269E-15 T(1,0)=-4.38375E-04 T(3,0)=-1.70545E-06 T(5,0)=-1.77067E-10 T(1,1)=8.20107E-05 T(3,1)=2.81293E-07 T(5,1)=2.10402E-11 T(1,2)=-7.99650E-06 T(3,2)=-2.74913E-08 T(5,2)=-2.07651E-12 T(1,3)=2.79160E-07 T(3,3)=9.59744E-10 T(5,3)=7.25547E-14 T(1,4)=-4.09545E-09 T(3,4)=-1.41387E-11 T(5,4)=-1.07835E-15 T(1,5)=2.07066E-11 T(3,5)=7.19243E-14 T(5,5)=5.55545E-18 T1(0,0)=4.22939E-01 T1(2,0)=-2.58902E-06 T1(4,0)=1.23481E-09 T1(0,1)=-1.63307E-03 T1(2,1)=-8.19620E-07 T1(4,1)=-2.18860E-10 T1(0,2)=-1.27089E-06 T1(2,2)=6.04984E-08 T1(4,2)=1.58527E-11 T1(0,3)=-1.81205E-07 T1(2,3)=-1.50287E-09 T1(4,3)=-3.97157E-13 T1(0,4)=1.61853E-09 T1(2,4)=1.58143E-11 T1(4,4)=4.21262E-15 T1(0,5)=-7.84793E-12 T1(2,5)=-5.75453E-14 T1(4,5)=-1.54659E-17 T1(1,0)=-1.67373E-03 T1(3,0)=-1.46340E-07 T1(5,0)=-6.17352E-12 T1(1,1)=2.35748E-05 T1(3,1)=2.10009E-08 T1(5,1)=7.78907E-13 T1(1,2)=-8.08433E-07 T1(3,2)=-1.50273E-09 T1(5,2)=-5.79691E-14 T1(1,3)=2.07575E-08 T1(3,3)=3.75675E-11 T1(5,3)=1.45610E-15 T1(1,4)=-2.15323E-10 T1(3,4)=-3.96237E-13 T1(5,4)=-1.55376E-17 T1(1,5)=7.61606E-13 T1(3,5)=1.44604E-15 T1(5,5)=5.75357E-20 (See file XRS_REQS_7_2_047.TIF for the figure) Figure 2 Angular_Fluor_Fct(???? APPENDIX 3 Location of XRS Level-2 Parameters in the U of A Database E.5. NEAR XRS Science Housekeeping (SCI HK) Parameters: 53*(Integer*4) (See files XRS_REQS_7_2_048.TIF to XRS_REQS_7_2_050.TIF for tables) E.6. NEAR XRS Engineering Housekeeping (ENG HK) Parameters: 163*(REAL*4) (See files XRS_REQS_7_@_050.TIF to XRS_REQS_7_2_056.TIF for tables) E.7. NEAR XRS Derived Engineering (DER ENG) Parameters: 28*(Real*4), 1*(Integer*4), 4*(Integer*4) (See file XRS_REQS_7_2_057.TIF for table) E.8. NEAR XRS Spatial (SPATIAL) Parameters: 1*(Integer*4), 38*(Real*4) (See files XRS_REQS_7_2_057.TIF to XRS_REQS_7_2_058.TIF for tables) E.9. NEAR XRS Solar (SOLAR) Parameters: 2*(Real*4) (See file XRS_REQS_7_2_059.TIF for table) G. Listing of Parameters for XRS Fractional Footprint Accounting System (Please see file XRS_REQS_7_2_059.TIF for table) NEAR XRS Requirements Specs Revision Notes NEAR XGRS Team Meeting September 15, 1999 (Version 7 Upgrades) XRS Document Revisions: 1. Pg 3 Removed 2 Eng_hk redundant parameters from record: Formats 1 and 2: Eng_HK changed from 165 to 163 total parameters. Two parameters: gray_burst_thresh_val: Partition Offset (46,139) kept at 46 gray_burst_sci_rec_mode: positions (62,140) kept at 62 Related: Forced changes in E.6 title (pg. 7) and list (Pg. 10), H.6 (title) pg.15 Modified SCIHK also for new V7 total parameters 2. Pg 6-7 Added 9 SCI_HK parameters E.5 and labeled for version 7 sofware upgrade. 3. Pg 7-10 Added 25 ENG_HK parameters E.6 and labeled for version 7 software upgrade. 4. Pg 10 E.7 BADID and QUERYID is a total 5*(I*4) field in Title 5. Pg 14 Added 7 BINID to Fractional Footprint Accounting (Section G) 6. Pg 15 Modified Live Time equations for MG,AL,UNF,Solar (Derived Eng) R. Starr 7. Pg 17 Bsite vectors changed from km to unitless 8. Pg 22 Added comment * Plate solid angle modified by plate fraction in FOV. (JSB) 9. Pg 24 Modified Equation for V. Removed factor 3*SQRT(Solar_Integral*300) Added Line: V values will be modified and subject to change: --> Dynamically loaded at Runtime. 10. Pg 37 Added elaboration of 7 BINID to section J. Fractional Footprint Accounting System 11. Pg 42 Added Comment * Currently testing method using fractional FOV boundaries. 12. Pg 43 Modified Angular_Fluor_Fct and Angular_Scat_Fct derivations October 18, 1999 Following revision is suggested. 1. Pg.3 Format 1: tailing parameter is added to the description of valid Derived Eng. Record parameters. 2. Pg.11 E.7.: Paramaters 22-24 are renamed. Parameters 25-27 are removed. Parameter 25 is set as TAILING_PARAMETER. Parameter 26-27: spare. 3. Pg.11-12 E.8.: Parameters 18,20,30 are made valid for FOV_STATUS=2,4 (Darkside) 4. Pg.13-14 F.10: Param.0-1,8-9 "not valid IF FOV_STATUS=0" added, Param.2-4,10-12 "not valid IF FOV_STATUS=0,2,4" added, Param.5,13,16 "=0 IF FOV_STATUS=0" added, Param.6-7,14-15 "=0 IF FOV_STATUS=0,2,4" added 5. Pg.14 G.: Param.5: "=0 IF FOV_STATUS=2,4" is removed in acc. with note 3. 6. Pg.15-16 H.7.: In description of param.12-15 eng.param.names are adjusted. 7. Pg.16 H.7.: Param.16,19-21 definition is modified in accordance with new spectrum limits. Derivation algorithm is added. 8. Pg.16 H.7.: Param.22-24 are redefined and renamed accordingly to revision note 2. Param.25 is set as TAILING_PARAMETER. 9. Pg.17 H.7.: Param.26-27 are removed, now spare. 10. Pg.17 H.8.: In param.3-14 description light time correction NEAR-Eros is removed. 11. Pg.18,21 H.8.: Param.18,20,30 are redefined to characterise Darkside as well. 12. Pg.19-22 H.8.: Param.21-25,28-31: Added comment "Fractions of the plates are considered". 13. Pg.22 H.8.: Param.33 - specifications for Boresight_Intersection_Lon are changed. 14. Pg.23 H.9.: For param.0 upper limit of integration is changed to 253 in accordance with new spectrum limits. 15. Pg.28,29 I.9.: Insignificant changes in description of param.14-19,35-40 16. Pg.28-30 I.9.: Param.20-25,41-46 description is modified in accordance with modifications to param.22-24 of Der.Eng. (revision notes 2,8). 17.Pg.30,33 I.10: Param.0,8 description is modified in accordance with new definitions of param.18 of Spatial record (revision note 11). 18. Pg.36-37 J.: Param.3-6: Added comment "Fractions of the plates are considered". 19. Pg.37 J.: Param.5 is redefined in accordance with the param.30 of Spatial record (revision note 11). 20. Pg.42 App.2: New FOV_STATUS specifications. 21. Pg.43 App.2: Figure 2 "Footprint_Solid_Angle variations" is removed Figure 2 "Angular_Fluor_Fct(???)" is added. 22. Pg.44 Revision notes are added 23. Pg.45 Pending issues are added 24. Pg.i-ii Table of contents is added January 25, 2000 Following revision is suggested. 0. C: Nomenclature for Format 1-3 is changed 1. E6, multiple parameters: NaL is changed to NaI 2. G, param.6: "=0 if FOV_STATUS=2,4" is replaced by "not valid if FOV_STATUS=2,4" 3. H8, param.26-29: description of fractions added 4. H8, param.32-33: "Degrees" added 5. J, param.1-4: description of fractions added 6. Appendix 1.: some symbols definitions added April 6-7, 2000. Following revision is suggested. 1. E5, param.42-51: description is clarified 2. E6, param.101-104,106,108,110,111: description is clarified. 3. E7, H7, param.16-24: changed to valid for noncalibrated data. 4. E8, H8, param.26,27: set to -1 all the time. 5. G, J, param.1,2: set to -1 all the time. 6. H10, param.16: description is clarified. 7. I9, param.14-25,35-46: changed to valid for noncalibrated data. 8. I9, param.0-5: make it real gain/zero until calibration is implemented 9. Appendix 3 added January 12, 2001 Revision 1. Revisions of scattering treatment in Appendix 1 2. E8, H8, parameter 22 redefined to PHASE_ANGLE 3. F10, I10, parameters 3, 11 redefined to AVG_PHASE 4. H8, param 33 definition is changed Revision Notes Continued... May 25, 2001 Revision 1. Changed all Level-1 references in Document to Level 2 2. E.7, H.7 (Derived Engineering) changed all references To (Real and Standard) Gain, Zeros in Level-2 record to Spare. Calibration system was never implemented in UA XRS ground system. Parameters changed = (0-11) 3. F.9, I.9 (Derived Engineering, Summary Record) changed all References to (Standard) Gain, Zeros in record to Spare. Calibration system was never implemented in UA XRS Ground system. Parameters changed = (0-5) 4. Took out references to Tailing Parameter. The system was never implemented as part of the quicklook system. NEAR XRS Glossary and Acronym List AL X-ray Spectrometer: Aluminum Detector ANTICO Gamma-ray Spectrometer: Anti-Coincidence APL Applied Physics Laboratory AVG Average BGO Bismuth Germanate CH Channel CMD Command CTP Command and Telemetry Processing DER Derived Engineering DPU Data Processing Unit DSN Deep Space Network DQI Data Quality Index ENG Engineering ESC Escape ET Ephemeris Time FCT Function FLG Flag FOV Field of View FTP File Transfer Protocol GCR Galactic Cosmic Rays GAS PC Gas Proportional Counter Detector GRS Gamma Ray Spectrometer GSFC Goddard Space Flight Center LT Light Time HDF Hierarchical Data Format HK Space Craft or Instrument House Keeping Parameters HVPS High Voltage Power Supply I*4 Signed Integer 4 byte parameter = 32 bits JPL Jet Propulsion Laboratory keV Kilo Electron Volts LLD Lower Level Discriminator MET Mission Elapsed Time MeV Mega Electron Volts MG X ray Spectrometer: Magnesium Detector NAI Sodium Iodide NAIF Nasa Ancillary Information Facility NASA National Aeronautics and Space Administration NC Neutron Capture Radiation NR Natural Radioactivity Radiation NEAR Near Earth Asteroid Rendezvous POS Position PIN X-ray Spectrometer: Silicon PIN Detector QueryID Query IDentifier file served by Relational Database Management System R*4 Floating Point 4 byte Parameter = 32 bits RDBMS Relational Database Management System RT Rise Time SC Space Craft SCI Science NEAR XRS Glossary and Acronym List Cont. SDC Applied Physics Laboratory Science Data Center SPICE Spacecraft - Planetary - Instrument - C-matrix - Ephemerides TBD To Be Decided UA University of Arizona UA-LPL University of Arizona - Lunar and Planetary Laboratory UA-RDBMS University of Arizona - Relational Database Management System UNF X-ray Spectrometer: Unfiltered Detector WWW World Wide Web XDR eXternal Data Representation XGRS X-ray and Gamma-ray Spectrometer XRS X-ray Spectrometer