Benefits of Using Galileo for Real-Time GNSS Meteorology
Tomasz Hadaś , Thomas Hobiger
AbstractRemote 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.
|Journal series||IEEE Geoscience and Remote Sensing Letters, ISSN 1545-598X, e-ISSN 1558-0571, (N/A 140 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Galileo, Geodesy, Global Navigation Satellite System, real-time, remote sensing, troposphere|
|License||Journal (articles only); published final; ; with publication|
|Not used for evaluation||yes|
|Publication indicators||: 2018 = 1.723; : 2018 = 3.534 (2) - 2018=3.484 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.