GPS data processing of networks with mixed single- and dual-frequency receivers for deformation monitoring

Details GPS data processing of networks with mixed single- and dual-frequency receivers for deformation monitoring GPS data processing of networks with mixed single- and dual-frequency receivers for deformation monitoring

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010adspr..46..130z&link_type=abstract

Advances in Space Research, Volume 46, Issue 2, p. 130-135.

Physics

Scientific paper

In order to obtain crustal deformations of higher spatial resolution, existing GPS networks must be densified. This densification can be carried out using single-frequency receivers at moderate costs. However, ionospheric delay handling is required in the data processing. We adapt the Satellite-specific Epoch-differenced Ionospheric Delay model (SEID) for GPS networks with mixed single- and dual-frequency receivers. The SEID model is modified to utilize the observations from the three nearest dual-frequency reference stations in order to avoid contaminations from more remote stations. As data of only three stations are used, an efficient missing data constructing approach with polynomial fitting is implemented to minimize data losses. Data from large scale reference networks extended with single-frequency receivers can now be processed, based on the adapted SEID model. A new data processing scheme is developed in order to make use of existing GPS data processing software packages without any modifications. This processing scheme is evaluated using a sub-network of the German SAPOS network. The results verify that the new scheme provides an efficient way to densify existing GPS networks with single-frequency receivers.

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