PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "CH1 XSM PDS LABEL V1.1" /* FILE CHARACTERISTICS */ FILE_NAME = "XSM_NE_R01974_04.DAT" RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 2880 FILE_RECORDS = 50 INTERCHANGE_FORMAT = BINARY /* DATA OBJECT POINTERS */ ^HEADER = "XSM_NE_R01974_04.DAT" ^EXTENSION_HEADER = ("XSM_NE_R01974_04.DAT", 2881) ^TABLE = ("XSM_NE_R01974_04.DAT", 14401) /* IDENTIFICATION DATA ELEMENTS */ RELEASE_ID = 0001 REVISION_ID = 0000 DATA_SET_ID = "CH1ORB-X-C1XS-2-NPO-EDR-XSM-V1.0" DATA_SET_NAME = " CHANDRAYAAN-1-ORBITER SUN C1XS 2 NPO EDR XSM V1.0 " PRODUCT_ID = "XSM_NE_R01974_04" PRODUCT_CREATION_TIME = 2010-11-26T11:11:11 PRODUCT_TYPE = EDR PROCESSING_LEVEL_ID = 2 PROCESSING_LEVEL_DESC = " EDITED DATA: CORRECTED FOR TELEMETRY ERRORS. CORRESPONDS TO EDR - EXPERIMENTAL DATA RECORDS. PSA LEVEL-1B. CODMAC LEVEL 2. THE DATA ARE TAGGED WITH TIME AND LOCATION OF ACQUISITION. " MISSION_ID = CH1 MISSION_NAME = "CHANDRAYAAN-1" MISSION_PHASE_NAME = "NORMAL PHASE OPERATIONS" INSTRUMENT_HOST_ID = CH1ORB INSTRUMENT_HOST_NAME = "CHANDRAYAAN-1-ORBITER" INSTRUMENT_ID = C1XS INSTRUMENT_NAME = "LOW ENERGY X-RAY SPECTROMETER" INSTRUMENT_TYPE = SPECTROMETER INSTRUMENT_MODE_ID = "CALIB/OBS" INSTRUMENT_MODE_DESC = " XSM HAS 2 MODES: CALIBRATION AND OBSERVATION. THE DATA PRODUCT CONTAINS BOTH SOLAR AND CALIBRATION SPECTRA " TARGET_NAME = SUN TARGET_TYPE = SUN START_TIME = 2009-04-20T06:32:17.380 STOP_TIME = 2009-04-20T06:42:32.380 SPACECRAFT_CLOCK_START_COUNT = "0/0015566706.00000" SPACECRAFT_CLOCK_STOP_COUNT = "0/0015567321.00000" START_ORBIT_NUMBER = 1974 STOP_ORBIT_NUMBER = 1975 PRODUCER_ID = "XSM_TEAM" PRODUCER_FULL_NAME = "LAURI ALHA" PRODUCER_INSTITUTION_NAME = "OBSERVATORY, UNIVERSITY OF HELSINKI" /* DESCRIPTIVE DATA ELEMENTS */ DATA_QUALITY_ID = 1 DATA_QUALITY_DESC = "1=NORMAL 2=POOR" /* DATA OBJECT DEFINITIONS */ OBJECT = HEADER BYTES = 2880 HEADER_TYPE = FITS INTERCHANGE_FORMAT = BINARY RECORDS = 1 DESCRIPTION = " THIS PRIMARY HEADER CONTAINS THE STANDARD KEYWORDS TO DESCRIBE A FITS- FORMATTED DATA TABLE. " END_OBJECT = HEADER OBJECT = EXTENSION_HEADER BYTES = 11520 HEADER_TYPE = FITS INTERCHANGE_FORMAT = BINARY RECORDS = 4 DESCRIPTION = " THIS SECONDARY EXTENSION HEADER CONTAINS THE KEYWORDS REQUIRED TO DESCRIBE THE INTERNAL STRUCTURE OF A FITS-FORMATTED DATA TABLE AND THE AUXILIARY INFORMATION NEEDED IN FURTHER ANALYSIS OF THE DATA. " END_OBJECT = EXTENSION_HEADER OBJECT = TABLE COLUMNS = 37 INTERCHANGE_FORMAT = BINARY ROW_BYTES = 4266 ROWS = 30 DESCRIPTION = " THIS TABLE IS A FITS-FORMATTED BINARY ARRAY CONTAINING THE ARCHIVED LEVEL 2 DATA OF XSM. PADDING WITH ZERO VALUES MAY HAVE BEEN REQUIRED AFTER THE END OF THE TABLE OBJECT TO FIT THE FITS PHYSICAL RECORD LENGTH OF 2880 BYTES REQUIRED BY THE FITS STANDARD. " OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = SPECTRUM BYTES = 2048 START_BYTE = 1 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THE RAW DATA OF THE 512 CHANNEL X-RAY SPECTRUM OF THE XSM. " ITEMS = 512 ITEM_BYTES = 4 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = FLAG BYTES = 2 START_BYTE = 2049 DATA_TYPE = MSB_INTEGER DESCRIPTION = " A FLAG INDICATING THE SPECTRAL TYPE. 1=CALIBRATION 0=SOLAR SPECTRUM -1=BACKGROUND OR NOISE -2=TIME DISCONTINUITY SPECTRA ARE FLAGGED WITH TIME DISCONTINUITY WHEN THE TIME BETWEEN CONSECUTIVE SPECTRA IS OTHER THAN THE DEFAULT INTEGRATION TIME OF 16 SECONDS. SUCH A DISCONTINUITY MAY INDICATE AN UNCERTAIN INTEGRATION TIME CAUSED BY A BUG IN AN EARLY VERSION OF THE FLIGHT SOFTWARE. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = T_UTC BYTES = 26 START_BYTE = 2051 DATA_TYPE = CHARACTER DESCRIPTION = " INTEGRATION START TIME IN UTC. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = START_OBS BYTES = 8 START_BYTE = 2077 DATA_TYPE = IEEE_REAL DESCRIPTION = " BDH CLOCK COUNT AT THE START OF INTEGRATION. " UNIT = "SECOND" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = INTEGRATION_TIME BYTES = 4 START_BYTE = 2085 DATA_TYPE = MSB_INTEGER DESCRIPTION = " INTEGRATION TIME IN SECONDS. " UNIT = "SECOND" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = TOTAL_COUNTS BYTES = 8 START_BYTE = 2089 DATA_TYPE = IEEE_REAL DESCRIPTION = " TOTAL COUNTS IN THE SPECTRUM. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = A_EFF BYTES = 2048 START_BYTE = 2097 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE EFFECTIVE AREA IN CM^2 FOR EACH OF THE 512 CHANNELS OF THE XSM CORRESPONDING TO THE CURRENT INTEGRATION. " ITEMS = 512 ITEM_BYTES = 4 UNIT = "SQUARE CENTIMETER" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = PIN_TEMP BYTES = 8 START_BYTE = 4145 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE TEMPERATURE OF THE DETECTOR PIN IN CELSIUS. IF THE TEMPERATURE IS GREATER THAN 0 DEGREES CELSIUS, XSM IS SWITCHED OFF. " UNIT = "DEGREE CELSIUS" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = BOX_TEMP BYTES = 8 START_BYTE = 4153 DATA_TYPE = IEEE_REAL DESCRIPTION = " TEMPERATURE OF THE XSM SENSOR BOX IN CELSIUS. THIS TEMPERATURE VALUE DEPENDS ON THE POINTING OF THE XSM. " UNIT = "DEGREE CELSIUS" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = BIAS_HV BYTES = 8 START_BYTE = 4161 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE BIAS HIGH VOLTAGE. NOMINAL VALUE IS AROUND 100 VDC WHEN XSM IS OBSERVING. " UNIT = "VOLT" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = LEAKAGE_CURRENT BYTES = 8 START_BYTE = 4169 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE LEAKAGE CURRENT IN PICO AMPS. THIS VALUE DEPENDS ON THE CURRENT COUNT RATE, PIN TEMPERATURE AND LATTICE DEFECTS CAUSED BY PARTICLE RADIATION. LEAKAGE CURRENT CAN BE DECREASED BY ANNEALING. " UNIT = "PICOAMPERE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = POS_5_V BYTES = 8 START_BYTE = 4177 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE VOLTAGE OF THE POWER SUPPLY +5 V LINE. NOMINAL VALUE IS +5 VDC " UNIT = "VOLT" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = POS_12_V BYTES = 8 START_BYTE = 4185 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE VOLTAGE OF THE POWER SUPPLY +12 V LINE. NOMINAL VALUE IS +12 VDC " UNIT = "VOLT" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = NEG_12_V BYTES = 8 START_BYTE = 4193 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE VOLTAGE OF THE POWER SUPPLY -12 V LINE. NOMINAL VALUE IS -12 VDC. " UNIT = "VOLT" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = PELTIER_VOLTAGE BYTES = 8 START_BYTE = 4201 DATA_TYPE = IEEE_REAL DESCRIPTION = " THE PELTIER VOLTAGE. NOMINAL VALUE DURING COOLING IS AROUND 1.65 VDC. " UNIT = "VOLT" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = PELTIER_STATE BYTES = 1 START_BYTE = 4209 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THE PELTIER STATE. OFF = 0 AND COOLING = 1. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = FIFO_STATE BYTES = 1 START_BYTE = 4210 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THE FIFO STATE. 1=ACQUISITION ON 0=ACQUISITION OFF. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = DET_OVER_TEMP BYTES = 1 START_BYTE = 4211 DATA_TYPE = MSB_INTEGER DESCRIPTION = " DETECTOR OVER TEMPERATURE FLAG. NOMINAL VALUE IS 0. IF THE PIN TEMPERATURE EXCEEDS +0 DEGREES CELSIUS, THIS VALUE IS 1 AND XSM IS SWITCHED OFF. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = XSM_STATE BYTES = 4 START_BYTE = 4212 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE XSM STATE IN DECIMAL. STATE NUMBER STATE NAME 0 OFF 1 STARTING 2 COOLING 3 COOL 4 CALIBRATE 5 OPENING SHUTTER 6 OPERATING 7 CLOSING SHUTTER 8 PRE-ANNEAL1 9 PRE-ANNEAL2 10 ANNEAL 11 CLOSING SHUTTER FOR CALIBRATION " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 20 NAME = XSM_STATE_NAME BYTES = 12 START_BYTE = 4216 DATA_TYPE = CHARACTER DESCRIPTION = " THIS COLUMN CONTAINS THE XSM STATE IN ASCII. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 21 NAME = SECOND_COUNTER BYTES = 4 START_BYTE = 4228 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE SECOND COUNTER. THE VALUE IS THE NUMBER OF SECONDS THE XSM HAS BEEN IN THE STATE GIVEN IN THE XSM STATE COLUMN. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 22 NAME = RA_PNTG BYTES = 2 START_BYTE = 4232 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE RIGHT ASCENSION OF THE XSM POINTING IN DEGREES. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 23 NAME = DEC_PNTG BYTES = 2 START_BYTE = 4234 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE DECLINATION OF THE XSM POINTING IN DEGREES. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 24 NAME = SUN_FOV BYTES = 1 START_BYTE = 4236 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE FLAG INDICATING THE POSITION OF THE SUN IN RESPECT TO THE XSM FIELD OF VIEW. 1 MEANS THAT THE SUN IS INSIDE THE FOV, I.E. OFF-AXIS ANGLE OF THE SUN IS LESS THAN OR EQUAL TO 52 DEGREES, 0 MEANS THAT THE SUN IS OUTSIDE OF FOV, I.E. IT'S OFF-AXIS ANGLE IS GREATER THAN 52 DEGREES. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 25 NAME = RANGE_SUN BYTES = 4 START_BYTE = 4237 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE DISTANCE TO THE CENTER OF THE SUN IN KILOMETERS. " UNIT = "KILOMETER" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 26 NAME = RA_SUN BYTES = 2 START_BYTE = 4241 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE RIGHT ASCENSION OF THE SUN IN DEGREES. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 27 NAME = DEC_SUN BYTES = 2 START_BYTE = 4243 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE DECLINATION OF THE SUN IN DEGREES. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 28 NAME = OFF_AXIS BYTES = 2 START_BYTE = 4245 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE OFF-AXIS ANGLE OF THE SUN IN DEGREES IN RESPECT TO THE OPTICAL AXIS OF THE XSM (XSM +Z AXIS). THE SUN IS OUTSIDE OF THE FOV OF XSM WHEN THE OFF-AXIS ANGLE IS GREATER THAN 52 DEGREES. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 29 NAME = ROLL BYTES = 2 START_BYTE = 4247 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE ROLL ANGLE OF THE SUN IN DEGREES. ROLL ANGLE IS DEFINED TO BE 0-360 DEGREES FROM THE XSM +Y AXIS TOWARD THE XSM -X AXIS. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 30 NAME = MOON_FOV BYTES = 1 START_BYTE = 4249 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE FLAG INDICATING THE POSITION OF THE MOON IN RESPECT TO THE XSM FIELD OF VIEW. 1 MEANS THAT THE MOON IS INSIDE THE FOV, I.E. OFF-AXIS ANGLE OF THE MOON IS LESS THAN OR EQUAL TO 52 DEGREES, 0 MEANS THAT THE MOON IS OUTSIDE OF FOV, I.E. IT'S OFF-AXIS ANGLE IS GREATER THAN 52 DEGREES. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 31 NAME = RANGE_MOON BYTES = 4 START_BYTE = 4250 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE DISTANCE TO THE CENTER OF THE MOON IN KILOMETERS. " UNIT = "KILOMETER" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 32 NAME = OFF_MOON BYTES = 2 START_BYTE = 4254 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE OFF-AXIS ANGLE OF THE MOON IN DEGREES IN RESPECT TO THE OPTICAL AXIS OF THE XSM (XSM +Z AXIS). THE SUN IS OUTSIDE OF THE FOV OF XSM WHEN THE OFF-AXIS ANGLE IS GREATER THAN 52 DEGREES. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 33 NAME = ROLL_MOON BYTES = 2 START_BYTE = 4256 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE ROLL ANGLE OF THE MOON IN DEGREES. ROLL ANGLE IS DEFINED TO BE 0-360 DEGREES FROM THE XSM +Y AXIS TOWARD THE XSM -X AXIS. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 34 NAME = EARTH_FOV BYTES = 1 START_BYTE = 4258 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE FLAG INDICATING THE POSITION OF THE EARTH IN RESPECT TO THE XSM FIELD OF VIEW. 1 MEANS THAT THE EARTH IS INSIDE THE FOV, I.E. OFF-AXIS ANGLE OF THE EARTH IS LESS THAN OR EQUAL TO 51.62 DEGREES, 0 MEANS THAT THE EARTH IS OUTSIDE OF FOV, I.E. IT'S OFF-AXIS ANGLE IS GREATER THAN 51.62 DEGREES. " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 35 NAME = RANGE_EARTH BYTES = 4 START_BYTE = 4259 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE DISTANCE TO THE CENTER OF THE EARTH IN KILOMETERS. " UNIT = "KILOMETER" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 36 NAME = OFF_EARTH BYTES = 2 START_BYTE = 4263 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE OFF-AXIS ANGLE OF THE EARTH IN DEGREES IN RESPECT TO THE OPTICAL AXIS OF THE XSM (XSM +Z AXIS). THE EARTH IS OUTSIDE OF THE FOV WHEN THE OFF-AXIS ANGLE IS GREATER THAN 52 DEGREES. " UNIT = "DEGREE" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 37 NAME = ROLL_EARTH BYTES = 2 START_BYTE = 4265 DATA_TYPE = MSB_INTEGER DESCRIPTION = " THIS COLUMN CONTAINS THE ROLL ANGLE OF THE EARTH IN DEGREES. ROLL ANGLE IS DEFINED TO BE 0-360 DEGREES FROM THE XSM +Y AXIS TOWARD THE XSM -X AXIS. " UNIT = "DEGREE" END_OBJECT = COLUMN END_OBJECT = TABLE END