PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "2007-01-02 D. Humm, version 1 based on FFC data modified by S. Murchie and recalculated by S. Pelkey; 2007-05-21 D. Humm v2, based on v1 production-like IR TRDR; 2007-06-29 D. Humm v3, based on v1 IR volcano scan TRDR 2007_158/FFC61C4; 2008-11-17 D. Humm v4, based on images provided by M. F. Morgan; 2009-02-03 D. Humm v5, based on images provided by M. F. Morgan; 2012-03-14 FMorgan v8, TRR3, power law aerosol slope normalized, artifact spectrum" /*( NOTE: Comments in this label that are delimited with parentheses, )*/ /*( for example: )*/ /*( comment )*/ /*( are notes to the data provider. These comments should be removed )*/ /*( from the final label. Comments without parentheses, for example: )*/ /* comment */ /*( are intended to be part of the final label. )*/ /* Level 4 CDR (Calibration Data Record) Identification */ DATA_SET_ID = "MRO-M-CRISM-4/6-CDR-V1.0" PRODUCT_ID = "CDR420865293319_RT0000000L_8" /*( CDR4Ptttttttttt_pprbeeewsn_v )*/ /*( P = partition of sclk time )*/ /*( tttttttttt = s/c start or mean time )*/ /*( pp = calib. type from SIS table 2-8 )*/ /*( r = frame rate identifier, 0-4 )*/ /*( b = binning identifier, 0-3 )*/ /*( eee = exposure time parameter, 0-480 )*/ /*( w = wavelength filter, 0-3 )*/ /*( s = side: 1 or 2, or 0 if N/A )*/ /*( n = sensor ID: S, L, or J )*/ /*( v = version )*/ PRODUCT_TYPE = CDR INSTRUMENT_HOST_NAME = "MARS RECONNAISSANCE ORBITER" SPACECRAFT_ID = MRO INSTRUMENT_NAME = "COMPACT RECONNAISSANCE IMAGING SPECTROMETER FOR MARS" INSTRUMENT_ID = CRISM TARGET_NAME = MARS START_TIME = 2007-06-02T23:15:00 STOP_TIME = 2007-07-21T00:00:00 SPACECRAFT_CLOCK_START_COUNT = "2/0865293319" SPACECRAFT_CLOCK_STOP_COUNT = "2/0869443219" OBSERVATION_TIME = NULL PRODUCT_CREATION_TIME = 2012-04-06T10:40:00.000 OBSERVATION_TYPE = NULL OBSERVATION_ID = NULL MRO:OBSERVATION_NUMBER = NULL MRO:ACTIVITY_ID = NULL MRO:SENSOR_ID = "L" PRODUCT_VERSION_ID = "8" MRO:SPECTRAL_RESAMPLING_FLAG = "YES" MRO:SPECTRAL_RESAMPLING_FILE = "CDR420865293319_PS0000000L_3.IMG" /* CDR Instrument and Observation Parameters */ SAMPLING_MODE_ID = "HYPERSPEC" MRO:WAVELENGTH_FILE_NAME = "CDR410803692813_RW0000000L_3.IMG" MRO:DETECTOR_TEMPERATURE = NULL MRO:OPTICAL_BENCH_TEMPERATURE = NULL MRO:SPECTROMETER_HOUSING_TEMP = NULL MRO:SPHERE_TEMPERATURE = NULL MRO:FPE_TEMPERATURE = NULL SHUTTER_MODE_ID = "OPEN" LIGHT_SOURCE_NAME = "NONE" MRO:CALIBRATION_LAMP_STATUS = "OFF" MRO:CALIBRATION_LAMP_LEVEL = 0 MRO:FRAME_RATE = NULL PIXEL_AVERAGING_WIDTH = 1 /*( pixel bin size, across track ) */ MRO:EXPOSURE_PARAMETER = NULL MRO:WAVELENGTH_FILTER = "0" /* This Level 4 CDR label describes one calibration data file. The file */ /* is a mutiple-band, multiple-frame image file derived from flight data. */ /* It consists of a binary image followed by a list of row numbers */ /* corresponding to the wavelength filter. */ /* The AT or atmospheric transmission CDR was calculated by Frank Morgan */ /* of JHU/APL from CRISM observations of Olympus Mons. */ /* This file is used within CAT to estimate the amount of gas */ /* transmission in CRISM data, and remove it as a multiplicative factor. */ SOURCE_PRODUCT_ID = {"FFC000061C4_01_IF254L_TRR3"} /* Atmospheric Transmission from Volcano Scan with artifact spectrum */ /* */ /* This AT CDR is derived from volcano scan observation ID 061C4. */ /* It contains 3 lines. The first line is the atmospheric transmission */ /* spectrum at each binned detector column. Subsequent lines are artifact */ /* spectra for each column; different lines correspond to different pairs */ /* of scaling wavelengths as follows: */ /* Line 2: [2007.0,1980.0], McGuire */ /* Line 3: [2011.0,1899.0], Pelkey */ /* */ /* Atmospheric transmission is derived by dividing spectra from the base */ /* (near 0 km elevation) by spectra from the summit (near 20 km elevation). */ /* It includes a spectral fit-based adjustment to correct an aerosol-like */ /* slope at wavelengths shortward of approximately 2.7 microns. The raw */ /* transmission is fit at wavelengths outside gas absorptions with an */ /* aerosol model with optical depth quadratic in log wavelength, then */ /* divided by that fit. */ /* The detailed sshape of the 2-micron CO2 absorption in CRISM depends on */ /* pressure and temperature. The volcano scan derived transmision, */ /* combining high and low elevation spectra, differs in detail from the */ /* observed spectra being corrected. Atmospheric correction usually leaves */ /* a broad bowl-shaped depression around 2 microns as a result of the */ /* mismatch between scene and transmission spectra. A first order artifact */ /* correction can be applied by adding a multiple of an artifact spectrum */ /* from this CDR to the spectrum after initial correction. The artifact */ /* spectrum included in this CDR is derived by correcting spectra from the */ /* volcano scan base with the tranmsmission derived from the same volcano */ /* scan - essentially, correcting the volcano scan with itself. A linear */ /* interpolation between two wavelengths bracketing the 2-micron region */ /* is assumed to define the correct continuum, and the difference between */ /* continuum estimate and the actual correction is the artifact spectrum. */ /* For these artifact spectra, the interpolation wavelengths were: */ /* 1764.0,2239.0 nm */ /* Use the artifact spectrum matching the scaling wavelengths used for */ /* initial correction. */ /* */ /* This AT CDR applies to a period starting: */ /* SCLK = 865293319 */ /* UTC = 2007-06-02T23:15 */ /* EVENT: Midpoint of switch from Cooler 1 to Cooler 3 */ /* And ending: */ /* SCLK = 869443219 */ /* UTC = 2007-07-21T00:00 */ /* EVENT: Midpoint of CRISM/MCS safing event */ /* The values of the atmospheric transmission in the RT level 4 CDR are */ /* the same as those in the AT level 4 CDR, but they are resampled to the */ /* standard sampling wavelengths given in the SW level 6 CDR. The PS */ /* level 4 CDR is an image of integer pixel shifts to convert the AT */ /* level 4 CDR into an RT level 4 CDR. */ /* Description of CDR IMAGE file */ OBJECT = FILE ^IMAGE = "CDR420865293319_RT0000000L_8.IMG" /* offset is in file records, which is just (imgbands*imglines) + 1 */ ^ROWNUM_TABLE = ("CDR420865293319_RT0000000L_8.IMG",439 ) RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 2560 /* one row now, not one frame to save space in table */ FILE_RECORDS = 1315 /* compute by ROUND ((imgbands * imglines * */ /* line_samples * samplebits/8 + */ /* tablerows * tablerowbytes) / */ /* record_bytes + 0.5 ) */ OBJECT = IMAGE LINES = 3 LINE_SAMPLES = 640 SAMPLE_TYPE = PC_REAL SAMPLE_BITS = 32 BANDS = 438 BAND_NAME = NULL BAND_STORAGE_TYPE = LINE_INTERLEAVED DESCRIPTION = "Atmospheric transmission, resampled spectrally" END_OBJECT = IMAGE /* be sure to pad this object to a full record (2560/bin bytes here) */ OBJECT = ROWNUM_TABLE NAME = "SELECTED ROWS FROM DETECTOR" INTERCHANGE_FORMAT = "BINARY" ROWS = 438 COLUMNS = 1 ROW_BYTES = 2 DESCRIPTION = "The detector is subsampled in the spectral direction by selecting specific rows to be downlinked. This table provides a list of the rows selected for all frames in this multidimensional image cube." OBJECT = COLUMN NAME = DETECTOR_ROW_NUMBER DATA_TYPE = MSB_UNSIGNED_INTEGER BIT_MASK = 2#0000000111111111# START_BYTE = 1 BYTES = 2 DESCRIPTION = "Detector row number from which the data was taken." END_OBJECT = COLUMN END_OBJECT = ROWNUM_TABLE END_OBJECT = FILE END