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Satellite Realtime Navigation: Difference between revisions
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From the very beginning it was | From the very beginning it was realized that these systems could also be used for a wide range of scientific and other civil applications. New tracking methods that were not foreseen by the original developers of the systems, like carrier tracking, were proposed and, as soon as it was possible, successfully tested and used. One of the applications that was soon envisioned was the use of GPS for navigation of spacecraft. The first onboard receiver was installed and flown in a Landsat satellite even before the complete GPS constellation was deployed. Since that time, more receivers have been flown on satellites, at first as a demonstration of increasingly precise uses and now as the main operational means of navigation<ref>[http://www.esa.int/esapub/bulletin/bullet90/b90mur.htm Satellite Navigation Using GPS, T.J. Martín Mur & J.M. Dow, ESA Bulletin Nr. 90, May 1997]</ref>. | ||
== Application Architecture == | == Application Architecture == | ||
For Satellite Realtime Navigation it is not usually possible to rely on post-processing algorithms and ground based station networks. For Low Earth Orbit spacecrafts kinematic point position solutions present a similar accuracy has terrestrial applications<ref>GNSS Applications and Methods - Chapter 13 - Space Applications, E. Gleen Lightsey, Artech House</ref>. This accuracy can be improved by using algorithms that incorporate a dynamic model of the spacecraft's orbit. | |||
Experiments with the Proba-2 satellite show that 1-2 m positioning accuracy could be achieved using onboard advanced real-time navigation filters<ref name="Proba2">[http://www.esa.int/esaMI/Proba/SEMAZ65PVFG_0.html Laser tag caps Proba-2’s technology-testing year], ESA Portal, November 2010</ref>. | |||
== Application Characterization == | == Application Characterization == | ||
== Application Examples == | == Application Examples == | ||
*ATV - Automated Transfer Vehicle - Expendable, unmanned resupply spacecraft developed by the European Space Agency. GPS and a star tracker is used to automatically rendezvous with the International Space Station and at a distance of 249 m, the ATV computers use videometer and telegoniometer data for final approach and docking manoeuvres<ref>[[Wikipedia:Automated Transfer Vehicle|Automated Transfer Vehicle in Wikipedia]]</ref>. | |||
*Proba-2 - The Proba satellites are part of ESA’s In-orbit Technology Demonstration Programme, missions dedicated to the demonstration of innovative technologies<ref>[http://www.esa.int/esaMI/Proba/SEMJJ5ZVNUF_0.html About Proba-2], ESA Portal, November 2010</ref>. Proba-2 incorporates two experimental GPS receivers for demonstration of Satellite Realtime Navigation and Precise Orbit Determination<ref name="Proba2"/>. | |||
== Notes == | == Notes == | ||
Revision as of 11:37, 31 August 2011
| Applications | |
|---|---|
| Title | Satellite Realtime Navigation |
| Author(s) | GMV. |
| Level | Medium |
| Year of Publication | 2011 |
From the very beginning it was realized that these systems could also be used for a wide range of scientific and other civil applications. New tracking methods that were not foreseen by the original developers of the systems, like carrier tracking, were proposed and, as soon as it was possible, successfully tested and used. One of the applications that was soon envisioned was the use of GPS for navigation of spacecraft. The first onboard receiver was installed and flown in a Landsat satellite even before the complete GPS constellation was deployed. Since that time, more receivers have been flown on satellites, at first as a demonstration of increasingly precise uses and now as the main operational means of navigation[1].
Application Architecture
For Satellite Realtime Navigation it is not usually possible to rely on post-processing algorithms and ground based station networks. For Low Earth Orbit spacecrafts kinematic point position solutions present a similar accuracy has terrestrial applications[2]. This accuracy can be improved by using algorithms that incorporate a dynamic model of the spacecraft's orbit.
Experiments with the Proba-2 satellite show that 1-2 m positioning accuracy could be achieved using onboard advanced real-time navigation filters[3].
Application Characterization
Application Examples
- ATV - Automated Transfer Vehicle - Expendable, unmanned resupply spacecraft developed by the European Space Agency. GPS and a star tracker is used to automatically rendezvous with the International Space Station and at a distance of 249 m, the ATV computers use videometer and telegoniometer data for final approach and docking manoeuvres[4].
- Proba-2 - The Proba satellites are part of ESA’s In-orbit Technology Demonstration Programme, missions dedicated to the demonstration of innovative technologies[5]. Proba-2 incorporates two experimental GPS receivers for demonstration of Satellite Realtime Navigation and Precise Orbit Determination[3].
Notes
References
- ^ Satellite Navigation Using GPS, T.J. Martín Mur & J.M. Dow, ESA Bulletin Nr. 90, May 1997
- ^ GNSS Applications and Methods - Chapter 13 - Space Applications, E. Gleen Lightsey, Artech House
- ^ a b Laser tag caps Proba-2’s technology-testing year, ESA Portal, November 2010
- ^ Automated Transfer Vehicle in Wikipedia
- ^ About Proba-2, ESA Portal, November 2010