1. what kind of noise/errors/uncertainties/unmodeled things affect the GPS precision : AS, SA, orbits, clocks, ionosphere, troposphere, antenna phase centers, centering (tribrachs), etc... 2. how do we evaluate GPS uncertainties ? (difference b

Many manufacturers of Real-Time Kinematic (RTK) Global Positioning System (GPS) positioning software ignore the temporal correlations found in GPS measurement errors. To understand the statistical value of GPS positions, temporal correlations must be