PDS_VERSION_ID = PDS3 RECORD_TYPE = UNDEFINED ^ASCII_DOCUMENT = "SCI_PROC.TXT" OBJECT = ASCII_DOCUMENT DOCUMENT_NAME = "Scientific Processing Software for MAG" DOCUMENT_TOPIC_TYPE = "SOFTWARE DESCRIPTION" INTERCHANGE_FORMAT = ASCII DOCUMENT_FORMAT = TEXT PUBLICATION_DATE = 2001 DESCRIPTION = "The SCI_PROC file contains the codes used for the production of science data files for the NEAR MAG experiment. The codes read files generated by another software package SDC_PROC, which is also included on this volume. In addition to the magnetic field data various housekeeping data were necessary to make correction to time-varying magnetic fields generated by the spacecraft. The software package performs two main functions: correction of spacecraft fields and rotation of the measured fields into different coordinates. The correction process includes: 1. Sensor orientation adjustment. 2. Subtraction of constant offset fields. 3. Subtraction of magnetic field generated by the system terminal board. 4. Subtraction of magnetic field generated by the analog and digital power system shunts. 5. Subtraction of magnetic field generated by solar array. 6. Correction of stepwise fields due to on/off of sensor heaters. Coordinate transformation was performed using spacecraft position and attitude data from the SPICE kernels. The corrected magnetic field vectors are presented in the following coordinates (Only NSO and EBF files are included in the data set). 1. Spacecraft coordinates 2. J2000 coordinates 3. Near Sun Orbital (NSO) coordinates 4. Eros Body Fixed (EBF) coordinates" END_OBJECT = ASCII_DOCUMENT END