NDLI: Absolute IGS antenna phase center model igs08.atx: status and potential improvements

Content Provider	Springer Nature Link
Author	Schmid, R. Dach, R. Collilieux, X. Jäggi, A. Schmitz, M. Dilssner, F.
Copyright Year	2015
Abstract	On 17 April 2011, all analysis centers (ACs) of the International GNSS Service (IGS) adopted the reference frame realization IGS08 and the corresponding absolute antenna phase center model igs08.atx for their routine analyses. The latter consists of an updated set of receiver and satellite antenna phase center offsets and variations (PCOs and PCVs). An update of the model was necessary due to the difference of about 1 ppb in the terrestrial scale between two consecutive realizations of the International Terrestrial Reference Frame (ITRF2008 vs. ITRF2005), as that parameter is highly correlated with the GNSS satellite antenna PCO components in the radial direction.For the receiver antennas, more individual calibrations could be considered and GLONASS-specific correction values were added. For the satellite antennas, all correction values except for the GPS PCVs were newly estimated considering more data than for the former model. Satellite-specific PCOs for all GPS satellites active since 1994 could be derived from reprocessed solutions of five ACs generated within the scope of the first IGS reprocessing campaign. Two ACs separately derived a full set of corrections for all GLONASS satellites active since 2003.Ignoring scale-related biases, the accuracy of the satellite antenna PCOs is on the level of a few cm. With the new phase center model, orbit discontinuities at day boundaries can be reduced, and the consistency between GPS and GLONASS results is improved. To support the analysis of low Earth orbiter (LEO) data, igs08.atx was extended with LEO-derived PCV estimates for big nadir angles in June 2013.
Starting Page	343
Ending Page	364
Page Count	22
File Format	PDF
ISSN	09497714
Journal	Journal of Geodesy
Volume Number	90
Issue Number	4
e-ISSN	14321394
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-12-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Receiver antenna calibration Satellite antenna phase center corrections International GNSS Service (IGS) Global navigation satellite systems (GNSS) GPS GLONASS Geophysics/Geodesy Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Geophysics Geochemistry and Petrology Computers in Earth Sciences

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