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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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Atmos. Meas. Tech., 10, 15-34, 2017
http://www.atmos-meas-tech.net/10/15/2017/
doi:10.5194/amt-10-15-2017
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
03 Jan 2017
Open-loop GPS signal tracking at low elevation angles from a ground-based observation site
Georg Beyerle and Florian Zus
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Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC1: 'Review of paper by G.Beyerle and F.Zus', Anonymous Referee #1, 22 Jun 2016 Printer-friendly Version Supplement 
AC1: 'Response to reviewer 1', Georg Beyerle, 09 Sep 2016 Printer-friendly Version Supplement 
 
RC2: 'Referee Report', Anonymous Referee #2, 24 Jun 2016 Printer-friendly Version 
AC2: 'Response to reviewer 2', Georg Beyerle, 09 Sep 2016 Printer-friendly Version Supplement 
Publications Copernicus
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Short summary
Ground-based observations of GPS satellites disappearing below the local horizon are analysed. Starting at +2 degree elevation angle the GPS signals are recorded in open-loop tracking mode down to −1.5 degrees. The open-loop Doppler model has negligible influence on the derived data products for strong signal-to-noise ratios; at lower signal levels, however, a notable bias is uncovered. These results may have implications for the design of future space-based GPS radio occultation missions.
Ground-based observations of GPS satellites disappearing below the local horizon are analysed....
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