PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM PRODUCT_ID = "DOCINFO.TXT" OBJECT = TEXT NOTE = "Description of the DOCUMENT directory contents for a VEX SPICAV SOIR data set." PUBLICATION_DATE = 2013-04-18 END_OBJECT = TEXT END The DOCUMENT directory contains all relevant documentation to allow working with the SOIR data archive (written by E. NEEFS & A. MAHIEUX) DESCRIPTION FILES ----------------- INSTRUMENT_DESC.TXT: gives a concise description of the instrument concept and working principle (written by E. NEEFS) INSTRUMENT_MODE_DESC.TXT : gives an overview of the different operational modes of SOIR (written by E. NEEFS) OBSERVATION_TYPE_DESC.TXT : gives an overview of the different scientificobservation goals of the Venus Express mission (written by M. BARTHELEMY) SOIR_DATAFILE_DESC.TXT : gives an overview of the directory - and filenaming convention and of the structure of the SOIR datafiles (.TAB) (written by E. NEEFS & A. MAHIEUX) VEX_ORIENTATION_DESC.TXT : describes the convention used to describe the Venus Express spacecraft orientation (written by M. BARTHELEMY) VEX_POINTING_MODE_DESC.TXT : provides the pointing mode of the spacecraft (written by M. BARTHELEMY) VEX_SCIENCE_CASE_ID_DESC.TXT : describes 10 typical Venus Express modes of observations (called "science cases") (written by M. BARTHELEMY) SOIR_CALIBRATION_DESC.DOC, SOIR_CALIBRATION_DESC.PDF, SOIR_CALIBRATION_DESC.TXT: describes the SOIR calibration procedure, steps to bring data from PASA level 1B (raw data) to PSA level 2 (calibrated data) and the content of the CALIB directory (written by A. MAHIEUX) SOIR_DATA_QUALITY_DESC.TXT : describes the 7 bit binary quality code applicable to the SOIR instrument (written by A. MAHIEUX) SOIR_CALIBRATION_SOFTWARE.TXT: this document describes the software used to calibrate the SOIR data (go from raw PSA level 1B to calibrated PSA level 2 data) (written by E. NEEFS & A. MAHIEUX) ARCHIVING INTERFACE CONTROL DOCUMENT (EAICD) -------------------------------------------- EAICD.DOC, EAICD.PDF, EAICD.TXT This EAICD (Experimenter to (Science) Archive Interface Control Document) is exclusively dedicated to the SOIR channel of the SPICAV/SOIR instrument on board Venus Express. The purpose of this EAICD is two fold. First it provides users of the SOIR instrument with detailed description of the product and a description of how it was generated, including data sources and destinations. Secondly, it is the official interface between the SOIR instrument team and the archiving authority. This document describes the data flow of the SOIR instrument on VENUS EXPRESS from the S/C until the insertion into the PSA. It includes information on how data were processed, formatted, labeled and uniquely identified. The document discusses general naming schemes for data volumes, data sets, data and label files. Standards used to generate the product are explained. Software that may be used to access the product is explained. The design of the data set structure and the data product is given, with examples in appendix. INSTRUMENT FLIGHT USER MANUAL ----------------------------- FLIGHT_USER_MANUAL.PDF This document contains all the information needed to correctly operate in-flight Spicav in both nominal and emergency conditions.It describes the specific operational rules (and constraints) to operate the instrument during the spacecraft non-ground lifetime. It defines the mission objectives, physical and functional configuration and operations modes of the instrument and also describes how the instrument can be controlled, operated and monitored by ground operations. INSTRUMENT TM/TC DOCUMENT (TMTC) -------------------------------- TMTC.DOC This document describes extensively the working modes and the telecommanding interface for the SOIR instrument and the structuring of the telemetry and housekeeping data packages. INSTRUMENT PAPER ---------------- INSTRUMENT_PAPER.DOC A new compact space borne high resolution spectrometer developed for the ESA Venus Express spacecraft is described. It operates in the IR wavelength range of 2.2 to 4.3 um and measures absorption spectra of minor constituents in the Venusian atmosphere. It uses a novel echelle grating with groove density of 4 lines per mm in a Littrow configuration, in combination with an IR Acousto-Optic Tunable Filter for order sorting and an actively cooled HgCdTe Focal Plane Array of 256 by 320 pixels. It is designed to obtain an Instrument Line Profile of 0.2 cm-1. First results on optical and spectral properties are reported. INSTRUMENT CALIBRATION PAPER ---------------------------- INSTRUMENT_CALIB_PAPER.DOC SOIR that is part of the SPICAV instrument on board Venus Express combines an echelle grating spectrometer with an Acousto-Optical Tunable Filter. It performs solar occultation measurements in the IR region at a high spectral resolution better than all previously flown planetary spectrometers. The wavelength range probed allows a detailed chemical inventory of the Venusian atmosphere above the cloud layer with an emphasis on the vertical distribution of the gases. A general description of the instrument is given and its in-flight performances are described. The different calibrations and data corrections are investigated, in particular the dark current and thermal background, the non-linearity, and the pixel to pixel variability of the detector; the overall sensitivity of the instrument; the tuning relation and band pass function of the AOTF; the spectral calibration and resolution.