High-temporal-resolution wet delay gradients estimated from multi-GNSS and microwave radiometer observations

Ning, Tong; Elgered, Gunnar

doi:https://doi.org/10.5194/amt-14-5593-2021

Articles | Volume 14, issue 8

https://doi.org/10.5194/amt-14-5593-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-14-5593-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 14, issue 8

Research article

|

17 Aug 2021

Research article |

| 17 Aug 2021

High-temporal-resolution wet delay gradients estimated from multi-GNSS and microwave radiometer observations

Tong Ning and Gunnar Elgered

Data sets

High temporal resolution wet delay gradients estimated from multi-GNSS and microwave radiometer observations Gunnar Elgered and Tong Ning https://doi.org/10.5878/fyt8-bs80

ERA5 Reanalysis (0.25 Degree Latitude-Longitude Grid) European Centre for Medium-Range Weather Forecasts (ECMWF) https://doi.org/10.5065/BH6N-5N20

Short summary

We have estimated horizontal gradients of the propagation delay caused by water vapour in the atmosphere using two independent techniques, namely global navigation satellite systems (GNSS) and microwave radiometry. The highest resolution was 5 min. We found that the sampling of the atmosphere in different directions is an important factor for high correlations between the two techniques and that GNSS data can be used to detect large short-lived gradients, however, with increased formal errors.