Bias Robustness of GPS Ambiguity Resolution
نویسنده
چکیده
GPS ambiguity resolution is the key to fast and high precision relative GPS positioning. Since unsuccessful ambiguity resolution, when passed unnoticed, will often lead to unacceptable errors in the positioning results, very high success rates are required for ambiguity resolution to be reliable. Biases which are unaccounted for will lower the level of the ambiguity success rate and thus increase the chance of unsuccessful ambiguity resolution. In this contribution we present a general formula that enables one to evaluate the success rates in the presence of such biases. As an example the formula is applied to the geometry-free GPS model and used to evaluate the models robustness against ionospheric biases. This will be shown for the single-, the dualand the future triple-frequency case.
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