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Real-Time EDL Navigation Performance Using Spacecraft to Spacecraft Radiometric DataA two-year task sponsored by NASA's Mars Technology Program's Advanced Entry, Descent and Landing (EDL) work area includes investigation of improvements to EDL navigation by processing spacecraft-to-spacecraft radiometric data. Spacecraft-to-spacecraft navigation will take advantage of the UHF link between two spacecraft (i.e. to an orbiter from an approaching lander for EDL telemetry relay) to build radiometric data, specifically the velocity between the two spacecraft along the radio beam, that are processed to determine position and velocity in real time. The improved onboard state knowledge provided by spacecraft-to-spacecraft navigation will improve the performance of entry guidance by providing a more accurate state estimate and ultimately reduce the landed position error. A previous paper documented the progress of the first year of this task, including the spacecraft definitions, selection and documentation of the required algorithms and analysis results used to define the algorithm set. The final year of this task is reported here. Topics include modifications to the previously selected algorithm set for implementation, and performance of the implemented algorithms in a stand-alone filter, on an emulator of the target processor and finally on a breadboard processing unit.
Document ID
20060051691
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Burkhart, P. Daniel
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ely, Todd
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Duncan, Courtney
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lightsey, Glenn
(Texas Univ. Austin, TX, United States)
Campbell, Todd
(Texas Univ. Austin, TX, United States)
Mogensen, Andy
(Texas Univ. Austin, TX, United States)
Date Acquired
August 23, 2013
Publication Date
January 21, 2006
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Meeting Information
Meeting: AIAA Guidance, Navigation and Control Conference
Location: Keystone, CO
Country: United States
Start Date: August 21, 2006
End Date: August 24, 2006
Distribution Limits
Public
Copyright
Other
Keywords
navigation
Entry, Descent, Landing (EDL)
Electra

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