Barneveld, P.W.L. and Montenbruck, Oliver and Visser, Pieter (2008) Differential Ionospheric Effects in GPS Based Navigation of Formation Flying Spacecraft. 3rd International Symposium on Formation Flying, Missions and Technology, 2008-04-23 - 2008-04-25, Noordwijk.
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For the Tandem-X and TerraSAR-X forma- tion to achieve its scientific goals, a rela- tive positioning accuracy is required of 1 mm. This formation is characterised by rel- atively small baselines (less than 1 km). Sin- gle differenced ionospheric delays in the GPS observations are therefore expected to be small, which can be exploited in a filter con- struction. This paper investigates the ionospheric de- lays that might be expected on small base- lines. As a test case for Tandem-X and TerraSAR-X the GRACE switch manoeuvre is taken. From the investigation some results are derived on the influence of spacecraft separation on a relative navigation Kalman filter. The relative navigation algorithms gener- ally make use of the observation data on both GPS carrier frequencies to eliminate ionospheric interference. Using the iono- sphere free combination of these frequencies comes at the cost of introducing some addi- tional noise to the observables. This noise affects the ambiguity resolution process. It is shown that high precision relative naviga- tion with only one GPS frequency is feasible for short baselines and might benefit the in- teger ambiguity resolution process.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Differential Ionospheric Effects in GPS Based Navigation of Formation Flying Spacecraft|
|Keywords:||Relative Navigation, Differenbtial ionospheric Effects, GPS, TanDEM-X|
|Event Title:||3rd International Symposium on Formation Flying, Missions and Technology|
|Event Type:||international Conference|
|Event Dates:||2008-04-23 - 2008-04-25|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W - no assignement|
|DLR - Research area:||Space|
|DLR - Program:||W - no assignement|
|DLR - Research theme (Project):||W -- no assignement (old)|
|Institutes and Institutions:||Space Operations and Astronaut Training|
|Deposited By:||Dr.rer.nat.hab. Oliver Montenbruck|
|Deposited On:||22 Jan 2009|
|Last Modified:||27 Apr 2009 15:44|
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