HP-SSA-DISR-2-3-EDR-RDR

Data Set Overview On January 14, 2005, the Huygens Probe, part of the joint NASA/ESA CassiniHuygens mission to Saturn, entered the atmosphere of Titan, descended for 2.5 hours under a parachute and eventually landed softly on the surface of Titan LEBRETONETAL2005. Six experiments collected data during the descent and on ground. The data set, which this data set catalog belongs to, is the archive of the Huygens Descent Imager and Spectral Radiometer (DISR). The DISR consists of 14 instruments; Three imagers, four solar aureole cameras, two imagers covering the visible spectrum, two imagers in the near infrared, two violet photometers, and a sun sensor. The data were taken from an altitude of approximately 145km down to Titans surface. The data taking was optimized by altitude and spin rate to meet the science objectives. The DISR data are presented in the PDS archive as described below. Data users are encouraged to also look at the DISR Data Users Guide in: \\DOCUMENT\\DISR_SUPPORTING_DOCUMENTS\\DISR_DATA_USERS_GUIDE DATA Directory The DATA directory contains all the data collected by DISR during the Titan descent arranged by detector system. Although the data are manipulated using a variant of IDL (Interactive Data Language, a product of Research Systems, Inc. of Boulder, Colorado.), the data are here presented in tabular or ASCII form for easy accessibility. The CCD_DARK_DATA datasets are the readout from covered columns of the CCD detector. Their values indicate the column dependent dark current being generated by the chip during the other measurements. The DERIVED_DATA_PRODUCTS directory contains reduced spectrometer data products as described below. The DESCENT_CYCLES datasets record key parameters at the beginning of each cycle of optimized data taking including the altitude and cycle type. There were about 110 Descent Cycles during the descent, and another 50 or so on Titans su truncated!, Please see ac [truncated!, Please see actual data for full text]