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- G23C-0301: Estimating local tie vectors by co-observation of GNSS satellites with the Very Long Baseline Array and GNSS antennas
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Board 0301‚ Hall EFG (Poster Hall)NOLA CC
Author(s):Generic 'disconnected' Message
Joe Skeens, University of Texas at Austin (First Author, Presenting Author)
Johnathan York, University of Texas at Austin
Leonid Petrov, NASA Goddard Space Flight Center
Kyle Herrity, University of Texas at Austin
Richard Ji-Cathriner, University of Texas at Austin
Srinivas Bettadpur, The University of Texas at Austin, Center for Space Research
This work introduces a new way to find the precise distance between a radio telescope used for Very Long Baseline Interferometry (VLBI) and a nearby Global Navigation Satellite System (GNSS) antenna. Instead of relying on traditional laser ranging surveys, we find this distance by observing the same GNSS satellites with both antennas. Using the differences in the arrival time of the satellite signals at the antennas, we can calculate the separation of the two antennas to within a few millimetres. This distance, called a local tie vector, is essential when data from different space‑geodetic techniques (GNSS, VLBI, SLR, and DORIS) are used together to build the most accurate global reference frames.
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