The International DORIS Service July 2003 – December 2005 report

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IDS Report – July 2003 to December 2005 22 could not be recovered between 1990 and 1992, due to computer and data format limitations. With the exception of this time period, all DORIS-equipped satellites have provided continuous data to the IDS data centers. Please note the large increase in the number of DORIS satellites around mid-2002. Figure 9. DORIS observations available at the IDS Data Centers (April 2006). A DORIS (and CERTO) receiver dedicated to global ionospheric measurements should fly on- board STPSAT1 (Plasma Physics and Space Systems Development Divisions, Naval Research Laboratory) by the end of 2006 (launch scheduled November 2006). There won’t be any new launch before 2008: - Jason-2/OSTM: June 2008 - CryoSat-2: March 2009 - Alti-KA: June 2009
7 IDS DATA FLOW COORDINATION IDS Report – July 2003 to December 2005 23 Carey Noll (1) (1) NASA/GSFC Two data centers currently support the archiving and access activities for the IDS: • Crustal Dynamics Data Information System (CDDIS), NASA GSFC, Greenbelt, MD USA • Institut Géographique National (IGN), Paris France These institutions have archived DORIS data since the launch of TOPEX/Poseidon in 1992. 7.1 FLOW OF IDS DATA AND PRODUCTS The flow of data, products, and information within the IDS is analogous to what is utilized in the other IAG geodetic services (IGS, ILRS, and IVS) and is shown in Figure 10. IDS data and products are transmitted from their source to the IDS data centers. DORIS data are downloaded from the satellite at the DORIS control and processing center, SSALTO (Segment Sol multi- missions d'ALTimétrie, d'Orbitographie et de localisation précise) in Toulouse, France. After validation, SSALTO transmits the data to the IDS data centers (at this time, CDDIS only). IDS analysis centers as well as other users retrieve these data files from the data centers and produce products, which in turn are transmitted to the IDS data centers. Network Stations Continuously operational Timely flow of data Data Centers Interface to network stations Perform QC and data conversion activities Archive data for access to analysis centers and users Analysis Centers Provide products to users (e.g., station coordinates, precise satellite orbits, Earth orientation parameters, atmos. products, etc.) Central Bureau/Coordinating Center Management of service Facilitate communications Coordinate activities Governing Body General oversight of service Future direction Figure 10. Routine flow of data and information for the IAG Geodetic Services
Page 1 and 2: The International DORIS Service Jul
Page 3 and 4: IDS Report - July 2003 to December
Page 5 and 6: 1 INTRODUCTION IDS Report - July 20
Page 11 and 12: 4.2 WEB AND FTP SITES 4.2.1 IDS WEB
Page 13 and 14: 4.3 THE MAIL SYSTEM IDS Report - Ju
Page 17 and 18: • Mount Stromlo (Australia) • C
Page 19 and 20: 5.4 IDS EXPERIMENTS IDS Report - Ju
Page 21: IDS Report - July 2003 to December
Page 25 and 26: 7.2 DORIS DATA IDS Report - July 20
Page 29 and 30: 8 ANALYSIS COORDINATION IDS Report
Page 33 and 34: Analysis Center (AC) DORIS IGN-JPL
Page 43 and 44: 8.7 ANALYSES OF STATION STABILITY I
Page 57 and 58: 14 CONCLUSION IDS Report - July 200
Page 61 and 62: 16 REFERENCES IDS Report - July 200

The International DORIS Service July 2003 – December 2005 report

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