PDS_VERSION_ID = PDS3 /* FILE CHARACTERISTICS DATA ELEMENTS */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 2880 /* FITS standard record length */ FILE_RECORDS = 47 FILE_NAME = "RA_FLAT_002.LBL" DATA_FORMAT = FITS /* INSTRUMENT AND MISSION DESCRIPTIVE DATA ELEMENTS */ INSTRUMENT_ID = "ALICE" INSTRUMENT_NAME = "ALICE" INSTRUMENT_TYPE = "ULTRAVIOLET SPECTROMETER" INSTRUMENT_HOST_ID = "RO" INSTRUMENT_HOST_NAME = "ROSETTA-ORBITER" MISSION_ID = "ROSETTA" MISSION_NAME = "INTERNATIONAL ROSETTA MISSION" /* DATA OBJECT POINTERS IDENTIFICATION DATA ELEMENTS */ ^HEADER = ("RA_FLAT_002.FIT",1) ^IMAGE = ("RA_FLAT_002.FIT",2) /* PRODUCT, DATA SET, AND VOLUME DATA ELEMENTS */ PRODUCT_ID = "RA_FLAT_002" PRODUCT_TYPE = REDR /* CODMAC Data Level 3 */ PRODUCT_CREATION_TIME = 2006-03-24 DATA_SET_ID = "RO-C/CAL-ALICE-2-EXT2-V1.0" PRODUCER_ID = "ROSETTA_ALICE" PRODUCER_FULL_NAME = "ANDREW J. STEFFL" PRODUCER_INSTITUTION_NAME = "SOUTHWEST RESEARCH INSTITUTE" /* DATA OBJECT DEFINITIONS */ OBJECT = HEADER BYTES = 2880 /* RECORD_BYTES x RECORDS */ HEADER_TYPE = FITS INTERCHANGE_FORMAT = BINARY RECORDS = 1 DESCRIPTION = " FITS header for Rosetta-Alice Notch-only flatfield file" END_OBJECT = HEADER OBJECT = IMAGE LINE_SAMPLES = 1024 /* FITS NAXIS1 keyword */ LINES = 32 /* FITS NAXIS2 keyword */ SAMPLE_BITS = 32 SAMPLE_TYPE = IEEE_REAL AXIS_ORDER_TYPE = "FIRST_INDEX_FASTEST" LINE_DISPLAY_DIRECTION = "UP" SAMPLE_DISPLAY_DIRECTION = "RIGHT" DESCRIPTION = " RA_FLAT_002.FIT contains the detector flatfield correction for Rosetta Alice, as measured in the laboratory. The flatfield has been normalized to the active area of the detector, excluding the photocathode gap region around Lyman alpha (approx. columns 605-625). After applying this flatfield to in-flight data, it was found that a significant flatfield artifact was introduced in the pixels contained in the range [675:710,16:18]. Due to the Rosetta pointing errors during the first Earth Swing-by, no in-flight flatfield is presently available. In light of the artifacts introduced by the laboratory flatfield, the Alice team currently (as of this dataset release) recommends that no flatfield be applied to the data." END_OBJECT = IMAGE END