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.
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.
GPS
microwave radiometry
wet delay
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