Remote sensing of water vapor using Global Navigation Satellite Systems (GNSS) is a well-established tool for weather and climate monitoring. The current challenges of GNSS meteorology are real-time performance and the inclusion of emerging GNSS, such as Galileo. We demonstrate that real-time GPS-only, Galileo-only, and GPS+Galileo solutions are consistent among each other. However, our results show that the Galileo-only solutions tend to underestimate Zenith Total Delay (ZTD) with respect to GPS. The Galileo-only real-time ZTD is less accurate as the one from GPS. The combination of both GNSS leads to a superior product. The daily solution availability increases by up to 50%, and the overall gain is 0.7% over the entire year. The accuracy improves by 3.7% to 8.5% and uncertainty is reduced by a factor of 1.5-2. A combined GPS and Galileo solution suppresses artifacts in a real-time ZTD product which otherwise would be attributed to high-frequency orbital effects.
%0 Journal Article
%1 hadas2020benefits
%A Hadas, Tomasz
%A Hobiger, Thomas
%D 2020
%J IEEE Geoscience and Remote Sensing Letters
%K myown from:tomasz.hadas 2020
%R 10.1109/LGRS.2020.3007138
%T Benefits of Using Galileo for Real-Time GNSS Meteorology
%U https://ieeexplore.ieee.org/document/9141353
%X Remote sensing of water vapor using Global Navigation Satellite Systems (GNSS) is a well-established tool for weather and climate monitoring. The current challenges of GNSS meteorology are real-time performance and the inclusion of emerging GNSS, such as Galileo. We demonstrate that real-time GPS-only, Galileo-only, and GPS+Galileo solutions are consistent among each other. However, our results show that the Galileo-only solutions tend to underestimate Zenith Total Delay (ZTD) with respect to GPS. The Galileo-only real-time ZTD is less accurate as the one from GPS. The combination of both GNSS leads to a superior product. The daily solution availability increases by up to 50%, and the overall gain is 0.7% over the entire year. The accuracy improves by 3.7% to 8.5% and uncertainty is reduced by a factor of 1.5-2. A combined GPS and Galileo solution suppresses artifacts in a real-time ZTD product which otherwise would be attributed to high-frequency orbital effects.
@article{hadas2020benefits,
abstract = {Remote sensing of water vapor using Global Navigation Satellite Systems (GNSS) is a well-established tool for weather and climate monitoring. The current challenges of GNSS meteorology are real-time performance and the inclusion of emerging GNSS, such as Galileo. We demonstrate that real-time GPS-only, Galileo-only, and GPS+Galileo solutions are consistent among each other. However, our results show that the Galileo-only solutions tend to underestimate Zenith Total Delay (ZTD) with respect to GPS. The Galileo-only real-time ZTD is less accurate as the one from GPS. The combination of both GNSS leads to a superior product. The daily solution availability increases by up to 50%, and the overall gain is 0.7% over the entire year. The accuracy improves by 3.7% to 8.5% and uncertainty is reduced by a factor of 1.5-2. A combined GPS and Galileo solution suppresses artifacts in a real-time ZTD product which otherwise would be attributed to high-frequency orbital effects.},
added-at = {2020-07-17T13:51:18.000+0200},
author = {Hadas, Tomasz and Hobiger, Thomas},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/23a7de78437746b50de359812c5783e9b/ins},
doi = {10.1109/LGRS.2020.3007138},
interhash = {53ca0aafe9f73f36b307746969560ee0},
intrahash = {3a7de78437746b50de359812c5783e9b},
journal = {IEEE Geoscience and Remote Sensing Letters},
keywords = {myown from:tomasz.hadas 2020},
timestamp = {2020-07-17T11:51:18.000+0200},
title = {Benefits of Using Galileo for Real-Time GNSS Meteorology},
url = {https://ieeexplore.ieee.org/document/9141353},
year = 2020
}