PDS_VERSION_ID = PDS3 RECORD_TYPE = "FIXED_LENGTH" FILE_RECORDS = 6468 RECORD_BYTES = 20 ^TABLE = "PLATE_TEMP.TAB" DATA_SET_ID = "DIF-C-HRII-5-TEMPEL1-SURF-TEMP-MAPS-V1.0" INSTRUMENT_HOST_NAME = "DEEP IMPACT FLYBY SPACECRAFT" INSTRUMENT_HOST_ID = "DIF" INSTRUMENT_NAME = "DEEP IMPACT HIGH RESOLUTION INSTRUMENT - IR SPECTROMETER" INSTRUMENT_ID = "HRII" /***** PRODUCT INFORMATION *****/ PRODUCT_ID = "PLATE_TEMP-200704" PRODUCT_NAME = "DI 9P/TEMPEL 1 THERMAL PLATE MODEL" PRODUCT_CREATION_TIME = 2007-04-05T16:27:00 /***** TIME INFORMATION *****/ START_TIME = 2005-07-04T05:31:56.981 STOP_TIME = 2005-07-04T05:40:20.251 START_JULIAN_DATE_VALUE = 2453555.7305206 STOP_JULIAN_DATE_VALUE = 2453555.7259728 SPACECRAFT_CLOCK_START_COUNT = "1/0173726945.147" SPACECRAFT_CLOCK_STOP_COUNT = "1/0173726552.164" /***** OBSERVATION INFORMATION *****/ TARGET_NAME = "9P/TEMPEL 1 (1867 G1)" OBSERVATION_ID = {9000036,9000039} OBJECT = TABLE INTERCHANGE_FORMAT = "ASCII" NAME = "TEMPEL 1 THERMAL PLATE MODEL" ROWS = 6468 ROW_BYTES = 20 COLUMNS = 2 DESCRIPTION = "This table provides a derived temperature for 6468 plates of the 32400 triangular-plate model for the surface of comet 9P/Tempel 1 for which there are thermal data. Plates without thermal data were excluded from this table. The PDS data set, DIF-C-HRIV/ITS/MRI-5-TEMPEL1-SHAPE-V1.0, includes the Tempel 1 shape model used for this analysis. It is available online at the Small Bodies Node. As in the plate shape model, the surface of the nucleus of Tempel 1 is represented by a collection of triangle plates. From the thermal maps, the temperatures of the illuminated and visible plates at the time of impact could be determined. To do this, the composite thermal map with pixel scale 120 m/pixel was used. A map of plate numbers was rendered at the geometry of impact, where the value of a pixel represents the index of the plate that was projected onto this pixel in the composite thermal map. The pixel scale of the plate map was 16 m/pixel, a scale that was finer than the sizes of most plates so that every pixel falls into one plate. The composite thermal map was then rescaled to this resolution, so that the plate map could be registered to it by comparing the limb/terminator profile and a few large features. The temperatures of illuminated and visible plates were extracted by comparing the composite thermal map with the registered plate map. Due to the uncertainty of the plate shape model and the low signal close to the limb and terminator of the nucleus in the thermal map the edge of the plate map and thermal map could not be aligned everywhere. Therefore, all plates with their average mu0 (cosine of the incidence angle) or mu (cosine of the emission angle) smaller than 0.17 (80 degrees) were discarded from this list. For the plates included in this table, the uncertainties in their temperature were dominated by the composite thermal map which was in turn affected by the registration error during the generation process, as well as by the uncertainty of the original thermal maps for HRII exposures 9000036 and 9000039 on which the composite map was based. " OBJECT = COLUMN NAME = "PLATE_ID" START_BYTE = 4 BYTES = 5 DATA_TYPE = "ASCII_INTEGER" FORMAT = "I5" DESCRIPTION = "Shape model plate ID; this is the zero-based index number into the plate portion of the 32400 triangular-plate model archived in the PDS data set DIF-C-HRIV/ITS/MRI-5-TEMPEL1-SHAPE-V1.0" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PLATE_TEMPERATURE" START_BYTE = 13 BYTES = 6 DATA_TYPE = "ASCII_REAL" FORMAT = "F6.2" UNIT = "KELVIN" DESCRIPTION = "Temperature associated with this plate." END_OBJECT = COLUMN END_OBJECT = TABLE END