Do GNSS parameters always benefit from integer ambiguity resolution? A PPP-RTK network scenario
MetadataShow full item record
All rights reserved. In this contribution we study the impact of integer ambiguity resolution (IAR) on the precision of GNSS estimable parameters. In doing so, a multivariate formulation of the GNSS undifferenced observation equations of a PPP- RTK network is presented, where appropriate one-to-one transformations to the parameters ease our analysis. Functions of the estimable slant ionospheric delays are shown to have distinct responses to IAR, ranging from zero (of a satellite-/receiver-averaged type) to very significant (of a double-differenced type). While the satellite-/receiver- Averaged components of the estimable clocks and phase biases on a particular frequency remain unaffected after IAR, the precision of their single-differenced (SD) counterparts experiences improvement. In particular, the precision improvement gets larger as the geometry of the model gets weaker. This is, however, not the case with the wide-lane satellite phase biases, since their precision is almost insensitive to the geometry of the model. Supported by numerical results, our analytical expressions show that the precision improvement of the SD satellite clocks and phase biases increases as the number of stations increases. We also highlight the zero-correlation property between the double-differenced ambiguities and the code biases that get estimable on the third frequency and beyond.
Showing items related by title, author, creator and subject.
Arora, Balwinder Singh (2012)The precise positioning applications have long been carried out using dual frequency carrier phase and code observables from the Global Positioning System (GPS). The carrier phase observables are very precise in comparison ...
El-Mowafy, Ahmed; Deo, M.; Rizos, C. (2016)© 2016 IOP Publishing Ltd. Various types of biases in Global Navigation Satellite System (GNSS) data preclude integer ambiguity fixing and degrade solution accuracy when not being corrected during precise point positioning ...
A method for processing GNSS data from regional reference networks to enable single-frequency PPP-RTKZhang, B.; Odijk, Dennis (2015)Global Navigation Satellite System (GNSS) data from reference station networks deployed globally can facilitate positioning, navigation and timing applications. To enable precise positioning for dual-frequency users, ...