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http://dx.doi.org/10.5139/JKSAS.2002.30.8.078

The Block Decorrelation Method for Integer Ambiguity Resolution of GPS Carrier Phase Measurements  

Tran, Binh Quoc (베트남 하노이대학교 지리학과)
Lim, Sam-Sung (인하대학교 지리정보공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.30, no.8, 2002 , pp. 78-86 More about this Journal
Abstract
The GPS carrier phase measurements include integer ambiguities and the decorrelation process on the variance-covariance matrix is necessary to resolve these ambiguities efficiently. In this paper, we introduce a new method for the ambiguity de-correlation. This method divides the variance-covariance matrix into 4 smaller blocks and decorrelates them separately. The decorrelation of each block is processed recursively so that the result of the previous step is not affected by the next step. A couple of numerical examples chosen in random show that this method is better than or comparable to other decorrelation methods, however, the speed of this is relatively faster because the computations are performed on small blocks of the variance-covariance matrix.
Keywords
GPS; Integer Ambiguity; Decorrelation; Variance-Covariance Matrix;
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