On the use of water vapour radiometry for assessment of wet delay estimates from space geodetic techniques

Paper i 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.