Paper Info
Title
The Tracking, Occultation And Ranging (Tor) Instrument Onboard Terrasar-X And On Tandem-X
Abstract
TerraSAR-X, to be launched at the end of May, 2007, will carry the Tracking, Occultation and Ranging (TOR) Category A payload instrument package. The TOR consists of a high-precision dual-frequency GPS receiver, called Integrated GPS Occultation Receiver (IGOR), for precise orbit determination and atmospheric sounding and a Laser retro-reflector (LRR) serving as target for the global Satellite Laser Ranging (SLR) ground station network. The TOR is supplied by the GeoForschungsZentrum Potsdam (GFZ) Germany, and the Center for Space Research (CSR), Austin, Texas. The objective of the German/US collaboration is twofold: provision of atmospheric profiles for use in numerical weather predictions and climate studies from the occultation data and precision SAR data processing based on precise orbits and atmospheric products. GFZ will also supply the TOR instrumentation for the follow-on mission TanDEM-X. For the scientific objectives of the TanDEM-X mission, i.e. bi-static SAR together with TerraSAR-X, the dual-frequency GPS receiver is of vital importance for the millimeter level determination of the baseline between the two spacecrafts.In the following, the TOR instrumentation is characterized by the features of and accuracies achievable with the GPS receiver and the LRR. The data flow is shown, as GFZ operates a high latitude data receiving station for fast data access, and runs a data system for preprocessing, archiving and retrieval. With this data system, higher level products will he generated for TerraSAR-X, including near real-time orbits by GFZ and post-processed precise science orbits by GFZ and CSR. In the case of TanDEM-X, GFZ will operationally determine the inter-satellite baseline on the millimeter level. CSR will produce calibration orbits to support the GFZ operational activity. Orbit results in terms of latency and accuracy from current missions are given and achievable results for TerraSAR-X and TanDEM-X are discussed.
Year
DOI
Venue
2007
10.1109/IGARSS.2007.4423980
IGARSS: 2007 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-12: SENSING AND UNDERSTANDING OUR PLANET
Keywords
Field
DocType
numerical weather prediction,orbit determination,atmospheric sounding,data flow,packaging,payloads,satellite laser ranging,climatology,data systems,data processing,weather forecasting,collaboration,data access,global positioning system,near real time
Orbit determination,Satellite laser ranging,Computer science,Occultation,Remote sensing,Atmospheric sounding,Ranging,Global Positioning System,Space research,Payload
Conference
ISSN
Citations 
PageRank 
2153-6996
2
1.08
References 
Authors
0
9
Name
Order
Citations
PageRank
Markus Rothacher121.76
Byron D. Tapley221.42
Cristoph Reigber321.08
Rolf König422.10
Carsten Falck551.57
Ludwig Grunwaldt621.08
Wolfgang Koehler721.08
Franz-Heinrich Massmann821.42
Grzegorz Michalak921.42