Strengthening the GNSS based kinematic positioning of low Earth orbiters for gravity field determination
(B03)
Subject Area
Geophysics
Geodesy, Photogrammetry, Remote Sensing, Geoinformatics, Cartography
Term
from 2014 to 2019
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 239994235
Within the first funding period, B03 investigated new approaches for kinematic orbit determination of low Earth orbiter satellites based on simulated and real GPS data. The first focus was on the concept of receiver clock modelling, which lead to an improved 3D RMS of 29 % for real data analysis. The second topic is the virtual receiver, which combines data from multiple GNSS antennas and strengthens the observation geometry for the radial component by 43 %. This concept will be further investigated in the second funding period. In addition, the direct velocity estimation based on GPS Doppler observations and its impact on gravity field recovery will be studied in detail.
DFG Programme
Collaborative Research Centres
