MINIMAL DETECTABLE BIASES OF GPS DATA

In this contribution closed-form expressions are given for the minimal detectable biases of single-and dual-frequency pseudo-range and carri er-phase data. They are given for three different single-baseline mode ls. These are the geometry-free model and two variants of the geometry -based model, namely the roving and stationary variants. The baselines are considered to be sufficiently short such that orbital uncertainti es in the fixed orbits and residual ionospheric and tropospheric delay s can be assumed absent. The stochastic model used is one that permits cross-correlation and the use of different variances for individual G PS observables, including the possibility to weigh the observables in dependence on which satellite is tracked.