GNSS data processing for precise point positioning network side is considered in the article. To calculate the corrections related to the satellites system core center collects and filters huge amount of observations. Among the others routine matrix algorithms are applied to estimate the polynomial coefficients, it requires a lot of computational resources. Instead of the application of matrix operations we suggest to apply a linear combination of the previous measurements to represent a polynomial value. Two network structures are analyzed and significant reduction of computational cost is shown.
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