Schreiber's Differencing Scheme Applied to Carrier Phase Observations in the MAFA Method

The subject of the article is Schreiber's scheme of carrier phase differencing in precise GNSS positioning. There is no need to assume the reference satellite in this approach. In this contribution the idea of Schreiber's scheme of differencing was modified and implemented into Modified Ambiguity Function Approach method. The modification of the original idea is based on preparing only double differences and applying them to MAFA functional model. In this approach the integer nature of ambiguities is taken into account. The functional model of this approach is described in details. The numerical tests were carried out. The comparison of the results from the proposed method and a classic approach was performed. For long static session no differences between both methods occur. However in single-epoch positioning results show that using a proposed method allows to obtain more correct solutions than in classic approach.