G31A-1094
Nontidal Loading Applied in VLBI Geodetic Analysis
Wednesday, 16 December 2015
Poster Hall (Moscone South)
Daniel S MacMillan, NVI, Inc., Planetary Geodynamics Laboratory, Goddard Space Flight Center, Greenbelt, MD, United States
Abstract:
<span">We investigate the application of nontidal atmosphere pressure, hydrology, and ocean loading series in the analysis of VLBI data. The annual amplitude of VLBI scale variation is reduced to less than 0.1 ppb, a result of the annual components of the vertical loading series. VLBI site vertical scatter and baseline length scatter is reduced when these loading models are applied. We operate nontidal loading services for hydrology loading (GLDAS model), atmospheric pressure loading (NCEP), and nontidal ocean loading (JPL ECCO model). As an alternative validation, we compare these loading series with corresponding series generated by other analysis centers.
