Small scale atmospheric variations sensed with very short baseline interferometry (VSBI) and microwave radiometry
Paper in proceeding, 2021

We have compared differential zenith wet delays, estimated between the 20 m telescope and the twin telescopes at Onsala, with linear horizontal gradients from a water vapour radiometer (WVR). The east and north gradients from the WVR are projected on to the baseline between the telescopes. The formal errors of the estimated differential zenith delays are comparable to the size of the estimated values.We obtain correlation coefficients for specific 24 h experiments in the range from 0 to 0.2, and the overall correlation is 0.1. Although the correlations are low, we use simulations to verify that they are in the expected range.

microwave radiometry

wet delay

horizontal gradients


Gunnar Elgered

Geoscience and Remote Sensing

Rüdiger Haas

Geoscience and Remote Sensing

Proceedings of the 25th European VLBI Group for Geodesy and Astrometry Working Meeting

978-91-88041-41-8 (ISBN)

The 25th European VLBI Group for Geodesy and Astrometry Working Meeting
Cyberspace, Sweden,

Driving Forces

Sustainable development

Subject Categories

Meteorology and Atmospheric Sciences

Other Earth and Related Environmental Sciences

Geosciences, Multidisciplinary


Basic sciences


Onsala Space Observatory

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7/4/2022 2