High‐Accuracy DGPS and Precise Point Positioning Based on Ohio CORS Network

In the precise point positioning (PPP) module of the Multi Purpose GPS Processing Software (MPGPSTM), developed at The Ohio State University, International GPS Service (IGS) products are tested along with the MPGPSTM-derived ionosphere models to provide instantaneous, kinematic, and static positioning. In this paper, we present an analysis of the accuracy of PPP during high and low daily total electron content (TEC) levels when 1 h of GPS data, either single- or dual-frequency, is available. The primary objective of the tests presented here is to verify the feasibility of both decimeter-level absolute GPS positioning in kinematic and static modes using the PPP approach, and submeter positioning using instantaneous PPP and differential GPS (DGPS). The multistation PPP and DGPS solutions are simulated in postprocessing using algorithms designed for real-time application. Static observations are used in the kinematic processing mode to evaluate the positioning accuracy obtained with both PPP and DGPS.