PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM RELEASE_ID = 0001 REVISION_ID = 0000 INSTRUMENT_HOST_NAME = "VENUS EXPRESS" INSTRUMENT_HOST_ID = "VEX" MISSION_NAME = "VENUS EXPRESS" OBJECT = TEXT PUBLICATION_DATE = 2007-01-31 NOTE = "VEX ASPERA-4 HIGH LEVEL DATA ARCHIVE" END_OBJECT = TEXT END VEX ASPERA-4 HIGH LEVEL DATA ARCHIVE 1. Overview ============================================================================== This archive contains solar wind parameters derived from ion data from the Ion Mass Analyzer (IMA) component of the ASPERA-4 instrument from the Venus Express mission. The general scientific objectives of ASPERA-4 are to study the solar wind and atmosphere interaction, and to characterize the plasma and neutral gas environment in the near-Venus space through energetic neutral atom (ENA) imaging and in-situ plasma measurements. The specific science measurements to carry out these goals are: 1. Integral ENA fluxes in the energy range of 0.1 to 60 keV. Neutral Particle Imager (NPI) 2. Mass/energy resolved neutral hydrogen and oxygen atom spectra in the energy range of 0.1 to 10 keV. Neutral Particle Detector (NPD) 3. Ion energy/mass/angle resolved spectra in the energy range of 0.01 to 36 keV/q for the main ion components H+, H2+, He+, O+, and for the group of molecular ions 20 < M/q < ~80; with 4pi steradian coverage. Ion Mass Analyzer (IMA) 4. Electron spectra in energy range of 10 eV to 20 keV, with up to 4pi steradian coverage. However, due to spacecraft blockage, 4pi coverage is never really achieved. Electron Spectrometer (ELS) The ASPERA-4 archived data sets contain data measurements necessary to satisfy the scientific goals and objectives. Getting Started: ---------------- For more information and detail concerning the organization and contents of the ASPERA-4 data sets, refer to the ASPERA-4 Experiment to Archive Interface Control Document (EAICD) found in the DOCUMENT directory (VEX_ASP_IRF_EAICD_V2_0.PDF). The ASPERA4_SWM.CAT file found in the CATALOG directory provides the solar wind parameters data set description. Look in the DOCUMENT directory for the following: Algorithm Description Documents SWM_REPORT.PDF - Provides detailed information about the solar wind parameters 2. Online Deliveries and Data Releases ============================================================================== The ASPERA-4 data files and labels are organized onto logical archive e-volumes (electronic volumes). A single ASPERA-4 data set (e.g., ELS EDR, NPI EDR/RDR, etc.) for a specified time interval is organized as a single archive e-volume. The PSA release object/mechanism is used for archive e-volume generation and submission. This means that each logical e-volume is a data release since they are for specific time periods. In other words, a logical archive e-volume is identical to a data set release. The collection of data set releases comprises the entire data set (all data for the whole mission). Once the data and files are generated and organized for a data release, the archive e-volume (or data set release) is ready for validation. The PSA Volume Validation (PVV) software tool is used to ensure all files are present and conform to PSA/PDS standards and to deliver the e-volume to PSA/PDS. 3. File Formats ============================================================================== The PDS Table object is used for the ASPERA-4 solar wind parameter data, and the data are in ASCII form. 4. Applicable Software ============================================================================== Any software or library that can read ASCII text files with the data in columns. 5. Whom to Contact for Information ============================================================================== VEX Project Scientist: H. Svedhem email: Hakan.Svedhem@esa.int phone: (31) 71 565 3370 fax: (31) 71 565 4697 smail: Postbus 299, 2200 AG Noordwijk, NL PSA Science Lead: S. Besse e-mail: sbesse@sciops.esa.int phone: (34) 91 81 31 542 fax: (34) 91 81 31 325 smail: ESAC, SRE-OOT, PO BOX 78, E-28691, Villanueva De La Canada, Madrid, Spain VEX Archive Scientist: E. Grotheer e-mail: egrotheer@sciops.esa.int phone: (34) 91 81 31 463 fax: (34) 91 81 31 325 smail: ESAC, SRE-OOT, PO BOX 78, E-28691, Villanueva De La Canada, Madrid, Spain For any PSA related issues: PSA Helpdesk: psahelp@cosmos.esa.int ASPERA-4 PI: Dr. Yoshifumi Futaana Swedish Institute of Space Physics (IRF), Kiruna, Sweden email: futaana@irf.se Co-PI: Dr. Stas Barabash Swedish Institute of Space Physics (IRF), Kiruna, Sweden email: stas@irf.se Co-PI: Dr. Jean-Andre Sauvaud Centre d'Etude Spatiale des Rayonnements (CESR), Toulouse, France email: Jean-Andre.Sauvaud@cesr.fr NASA PDS Archivist: Mr. Steve Joy UCLA-IGPP Los Angeles, CA, 90095-1567 email: sjoy@igpp.ucla.edu ASPERA-4 Operation Manager: Mr. Futaana Yoshifumi Swedish Institute of Space Physics (IRF), Kiruna, Sweden email: futaana@irf.se ASPERA-4 Operations and Data Engineer: Mr. Leif Kalla Swedish Institute of Space Physics (IRF), Kiruna, Sweden email: leif@irf.se