On the use of water vapour radiometry for assessment of wet delay estimates from space geodetic techniques
Paper in proceeding, 2023
We have studied the impact of liquid water drops in the atmosphere on the retrieval accuracy of the wet propagation delay using microwave radiometry
through a comparison with the corresponding results from ground-based GPS observations. Using all data available acquired at the Onsala Space Observatory during 2022 we find, as expected, the best agreement for the conditions with no, or a very small, liquid water content (LWC). For the LWC interval 0.0–0.1mm the bias and the standard deviation of the equivalent zenith wet delay (ZWD) agreement between the WVR and the GPS estimates are 3.3mmand 4.2 mm, respectively.
through a comparison with the corresponding results from ground-based GPS observations. Using all data available acquired at the Onsala Space Observatory during 2022 we find, as expected, the best agreement for the conditions with no, or a very small, liquid water content (LWC). For the LWC interval 0.0–0.1mm the bias and the standard deviation of the equivalent zenith wet delay (ZWD) agreement between the WVR and the GPS estimates are 3.3mmand 4.2 mm, respectively.
wet delay
microwave radiometry
GPS
Author
Gunnar Elgered
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Tong Ning
The Swedish Mapping, Cadastral and Land Registration Authority
Proceedings of the 26th European VLBI Group for Geodesy and Astrometry Working Meeting
50-54
26th EVGA Working Meeting
Bad Kötzting, Germany,
Bad Kötzting, Germany,
Driving Forces
Sustainable development
Subject Categories
Meteorology and Atmospheric Sciences
Earth and Related Environmental Sciences
Roots
Basic sciences
Infrastructure
Onsala Space Observatory
DOI
10.14459/2023md1730292