HP-SSA-SSP-3-4-DESCENT

Data Set Overview This archive contains science data products from observations acquired by the Huygens Probe Surface Science Package (SSP) instrument during the Descent of the Huygens Probe on 2005/01/15 as well as on the surface. SSP data products include raw data and calibration tables. This volume contains both. Descent data can be found in the /DATA/DESCENT/RAW directory. All data are organised by sensor (housekeeping data being treated like all other sensors), with the exception of the impact event which, for reasons of preserving the original data structure, is in a separate directory. SSP consists of nine sensors which are described in INST.CAT. In addition, housekeeping data and a special data packet on impact were created. The corresponding subdirectories are therefore ACCE ACCI APIS APIV DEN HK IMPACT PER REF THP TIL The /CALIB directory contains the necessary calibration information to convert the raw data from Voltages or A/D counts respectively to scientifically meaningful quantities. Given the calibration information alone, a conversion is possible. Should a clarification be required, please consult EAICD.DOC or SSP_SUM.DOC, both in the DOCUMENTS directory. DEN and PER (and, to some extent, also REF) have worked throughout the descent, but these sensors were not designed with the objective of atmospheric measurements in mind. Therefore the related data may only be of limited use. TIMING SSP times are given with with reference to the DDB T0 event, based on the Huygens onboard clock (see INSTHOST.CAT). At the time of archiving there appears to be an additional 250ms offset w.r.t. UTC pending verification. DATASET ORGANISATION Files on this volume are organized into a series of subdirectories below the toplevel directory. The following table shows the structure and content of these directories. In the table, directory names are enclosed in square brackets (). FILE CONTENTS Toplevel di truncated!, Please [truncated!, Please see actual data for full text]