A dataset provided by the European Space Agency

Name VEX-V-VRA-1-2-3-NMP-0040
URL ftp://npsa01.esac.esa.int/pub/mirror/VENUS-EXPRESS/VRA/VEX-V-VRA-1-2-3-NMP-0040-V1.0
DOI https://doi.org/10.5270/esa-e1zgdib
Abstract This is a Target Gravity measurement covering the time 2006-09-10T03:23:26.500 to 2006-09-10T04:08:02.500. This data set contains archival raw, processed, and supporting radio science Doppler data acquired from the Venus Express Radio Science Experiment (VeRa). The data were recorded using the closed loop receiver facilities at the European Space Agency (ESA) groundstations or at the NASA Deep Space Network (DSN) groundstations.
Description Data Set Overview The Venus Express (VEX) Radio Science (VeRa) Data Archive is a time-ordered collection of raw and partially processed data collected during the Venus Express Mission. This is a Target Gravity measurement covering the time 2006-09-10T03:23:26.500 to 2006-09-10T04:08:02.500. This is a Target Gravity measurement on Venus. These kind of measurements were typically conducted during Venus Express pericenter over interesting geophysical structures. This particular measurement was conducted over Atalanta Planitia Coronae. This data set was collected during the VEX science subphase 2 (PH2) 2006. For more information see MISSION.CAT. Mission Phase Definition ------------------------ The mission phases which are used in the Data Set Identifier 'DATA_SET_ID' correspond to the following table: Phase name | abbreviation | time span Nominal Mission Phase | NMP | 2005-11-09 - 2007-10-02 ---------------------------------------------------------------Extended Mission 1 | EXT1 | 2007-10-03 - 2009-05-31 ---------------------------------------------------------------Extended Mission 2 | EXT2 | 2009-06-01 - tbd The mission phases are further divided into science subphases. Mission phase and science subphase definitions can be found in CATALOG/MISSION.CAT and DOCUMENT/ESA_DOC/VEX_ARCHIVE_CONVENTIONS.PDF. Data files ---------- Data files are: the tracking files from Deep Space Network (DSN) and from the Intermediate Frequency Modulation System (IFMS) used by the ESA ground station New Norcia, Level 1a to level 2 data are archived, the predicted and reconstructed Doppler and range files, the Geometry files. All Level 1a binary data files will have the file name extension eee = .DAT IFMS Level 1a ASCII data files will have the file name extension eee = .RAW Level 1b and 2 tabulated ASCII data files will have the file name extension eee = .TAB B...
Instrument VRA
Temporal Coverage 2006-09-10T03:23:26Z/2006-09-10T04:08:02Z
Version V1.0
Mission Description Mission Overview Venus Express is ESA's first mission to Venus. It reuses the design of the Mars Express spacecraft. Many of the instruments are simply upgraded versions of those developed for ESA's Mars Express and Rosetta missions. The scientific objectives of the mission is to study the atmosphere, the plasma environment, and the surface of Venus in great detail. Venus Express was launched by a Soyuz-Fregat launcher from the Baikonour Cosmodrome on 9 November 2005. After separation, Venus Express, of mass 1244 kg, was placed into an interplanetary transfer orbit during approximately 150 days. After a 153 day cruise to Venus the spacecraft entered Venusian orbit on 11 april 2006. The first capture orbit was an eccentric polar and lasted 9 days. Several manoeuvres over the period 15 April-6 May 2006 lowered the spacecraft into its operational orbit: a 24-hour elliptical, quasi-polar orbit. The pericentre altitude is 250 kms and the apocentre altitude is 66000 kms. Pericentre altitude 250 km Apocentre altitude 66000 km Period 24 h Inclination ~90 deg Pericentre latitude 80 deg The mission has been described in many papers [ESABUL2005; HUNTER2004]. Details about the mission launch sequence and timeline can be obtained from the Mission Calendar [VEX-ESC-TN-5002] and from the Consolidated Report on Mission Analysis (CREMA)[VEX-ESC-RP-5500]. Mission Phases The mission timeline defines the different spacecraft and payload operations required per phase to prepare the spacecraft for Venus operational orbit acquisition, science data acquisition and transmission. Six nominal mission phases plus the pre-launch phase are defined for achieving the scientific mission objectives. They are detailed below. PRELAUNCH --------- Pre-launch operations started approximately 6 months before the launch and covered the period from delivery of the spacecraft to the launch site until L-8 hrs in the launch count...
Date Published 2010-10-18
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2010-10-18, VEX-V-VRA-1-2-3-NMP-0040, V1.0. https://doi.org/10.5270/esa-e1zgdib