Impact of Double Differences Correlation on the Adjustment of Small GNSS Networks
Publication: Journal of Surveying Engineering
Volume 145, Issue 2
Abstract
The effect of correlations in global navigation satellite system (GNSS) double difference observation has been investigated, and it has been empirically found that such effect is small in local networks (baseline up to a few kilometers). In this work, we show that if the extension of the network is very small (a few kilometers), if all receivers of the network observe the same satellites (no occlusion), and the network baselines are created by the star strategy, the discussed correlations do not have an impact at all on the estimates of the coordinates. The equivalence between the network solution and the single baseline solutions is first derived theoretically and then tested on a small real network. A method to derive the overall covariance matrix of the network from single baseline solutions is given.
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Published In
Journal of Surveying Engineering
Volume 145 • Issue 2 • May 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Apr 19, 2018
Accepted: Aug 28, 2018
Published online: Mar 6, 2019
Published in print: May 1, 2019
Discussion open until: Aug 6, 2019
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