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タイトルSingle-Frequency GPS Relative Navigation in a High Ionosphere Orbital Environment
本文(外部サイト)http://hdl.handle.net/2060/20070014901
著者(英)Naasz, Bo J.; Conrad, Patrick R.
著者所属(英)NASA Goddard Space Flight Center
発行日2007-01-01
言語eng
内容記述The Global Positioning System (GPS) provides a convenient source for space vehicle relative navigation measurements, especially for low Earth orbit formation flying and autonomous rendezvous mission concepts. For single-frequency GPS receivers, ionospheric path delay can be a significant error source if not properly mitigated. In particular, ionospheric effects are known to cause significant radial position error bias and add dramatically to relative state estimation error if the onboard navigation software does not force the use of measurements from common or shared GPS space vehicles. Results from GPS navigation simulations are presented for a pair of space vehicles flying in formation and using GPS pseudorange measurements to perform absolute and relative orbit determination. With careful measurement selection techniques relative state estimation accuracy to less than 20 cm with standard GPS pseudorange processing and less than 10 cm with single-differenced pseudorange processing is shown.
NASA分類Space Communications, Spacecraft Communications, Command and Tracking
レポートNOAAS 07-235
権利Copyright, Distribution as joint owner in the copyright


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