PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2015-11-11 NOTE = "Description of contents of CATALOG directory" END_OBJECT = TEXT END The CATALOG directory contains mission, host, instrument, reference, personnel, and data set PDS catalog objects for this archive volume. The files follow the 'streamlined' format adopted by the Planetary Data System (PDS) in late 1993 and documented in the Planetary Data System Standards Reference (Version 3.1, 3 August 1994; JPL D-7669, Part 2). The files evolved as the mission progressed; users should refer to the files on the most recent (highest numbered) archive volume for the most up-to-date information. Files on early volumes may be only 'place-holders.' Each catalog object is in ASCII; the files have a fixed length of 70 characters per line. Some files have variable lengths of rows. The details and correct values can be found in the label header of each file. Each line is delimited with a carriage-return (ASCII 13) line-feed (ASCII 10) pair. The files are: MISSION.CAT A brief description of the mission. It includes a chronology of events, definition of mission phases, and science objectives. INSTHOST.CAT A description of the Venus Express spacecraft and a very brief overview of the ESA and the NASA Ground Station systems. INST.CAT An overview of the spacecraft radio system used for these experiments on Venus Express, and a summary (albeit long) description of the ESA and Deep Space Network instrumentation which supports radio science experiments. Also included are summaries of the science objectives sought using the instrument. REF.CAT A listing of references used elsewhere in the catalog files and of references that might be generally useful in working with these data. PERSON.CAT A listing of key people involved in analyzing the radio data and in producing the archival data set. DATASET.CAT A description of the data set contained in the archival volumes. The file includes information on the primary data types included in the archive collection. Brief discussions of the quality of the data are included where a judgment can be made. SOFT.CAT This is a dummy SOFT.CAT with no contents. No software is included in this volume. TARGET.CAT An extensive description of targets used in the data labels.