Tying VLBI and GPS Terrestrial Frames: Case Study at Yebes Observatory
Abstract
Using the estimated coordinates in a common terrestrial frame, we have obtained the relative vector between the reference points of the GPS station and the 14-m and 40-m VLBI radio telescopes at the Yebes observatory. These vectors between both space geodetic instruments is a key issue for the realization of the International Terrestrial Reference Frame. As a preliminary assessment of the localtie survey, the estimation of the position and velocity in the ITRF2008 is used to derive the relative vector between these three instruments at the Yebes observatory. In the absence of systematic errors in the VLBI, the GPS, and the terrestrial survey observations, local-tie surveys and ITRF-derived relative vectors should agree. From the estimated coordinates of their reference points in the ITRF2008, we discuss the main issues of tying both VLBI and GPS terrestrial frames: how precisely is the relative position of both instruments determined? How does the data analysis and the observation setup impact the ITRF-derived vector?
- Publication:
-
Seventh General Meeting (GM2012) of the international VLBI Service for Geodesy and Astrometry (IVS
- Pub Date:
- December 2012
- Bibcode:
- 2012ivs..conf..152G