| 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NO | AAS 07-235 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
