GNSS Data Processing Workflow and Strategies

This chapter discusses the typical processing workflow and strategies for estimating parameters from GNSS data. The scope is based on processing which starts with raw GNSS observables. However, in the case of data reprocessing, normal equations become the starting point of the processing workflow. Information on preprocessing step which is common in GNSS software packages for quality control of data before the actual processing occurs is included. There is also a discussion on ambiguity resolution for precise positioning (and other parameter estimations) and reprocessing using normal equations. Important processing strategies and brief examples on PPP and orbits and clocks estimations are also included.