JPL Technical Report Server

Tracking capability for entry, descent and landing and its support to NASA Mars Exploration Rovers

Show simple item record Pham, Timothy Chang, Christine Fort, David Satorius, Edgar Finley, Susan White, Leslie Estabrook, Polly 2006-04-12T18:03:08Z 2006-04-12T18:03:08Z 2003-09-23
dc.identifier.citation ESA 3rd Workshop on Tracking, Telemetry and Command Systems for Space Applications, Darmstadt, Germany, September 23, 2003. en
dc.identifier.clearanceno 04-2430
dc.description.abstract This paper described a new capability recently deployed in the NASA Deep Space Network to support the entry, descent and landing of the two Mars Exploration Rovers - Spirit and Opportunity. This final segment of a 7-month journey was critical step in enabling successful mission operation. The EDL Data Analysis (EDA) equipment processed the open loop recording samples from the existing radio science receivers, extracted the MFSK-modulated tones, and provided information on the occurrence of associated events happened onboard spacecraft. The EDA software supported real-time as well as post pass processing. The design flexibility allowed the track to be divided into different segments, each could be processed with a configuration optimized for its signal conditions and uncertainties. The use of dynamic lock state concept enabled signal detection be done with minimum required computing power - less was spent when signal was steadily detected and more when signal fluctuated. With the server-client design, the EDA supported connections to different remote operation centers for monitor purpose. The paper also presented the field results from both Spirit and Opportunity landings. The detection were much better than anticipated. All critical event tones were seen in real time. Surprising detection of LCP signal was found with Spirit landing, resulted in a reconfiguration for Opportunity landing to maximize signal detection. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 324963 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2003. en
dc.subject entry en
dc.subject descent en
dc.subject landing en
dc.subject entry, descent and landing (EDL). en
dc.subject communications en
dc.subject tracking en
dc.subject Mars Exploration Rovers (MER) en
dc.title Tracking capability for entry, descent and landing and its support to NASA Mars Exploration Rovers en
dc.type Preprint en

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