The significant accuracy achieved through DGPS can be improved further if carrier-smoothing is applied to the pseudoranges. The SatNav Toolbox offers two functions to do this. HATCH implements the traditional Hatch filter and COMPKALM implements single-state complementary Kalman filters for each satellite being tracked. The results here show a tight cluster of points with the exception of a few strays which occured while the filter was converging.
