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Retrieving Precipitable Water Vapor From Shipborne Multi‐GNSS Observations
Author(s) -
Wang Jungang,
Wu Zhilu,
Semmling Maximilian,
Zus Florian,
Gerland Sebastian,
Ramatschi Markus,
Ge Maorong,
Wickert Jens,
Schuh Harald
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl082136
Subject(s) - gnss applications , radiosonde , precise point positioning , satellite , satellite system , precipitable water , remote sensing , environmental science , geodesy , meteorology , global positioning system , geology , water vapor , geography , computer science , engineering , telecommunications , aerospace engineering
Precipitable water vapor (PWV) is an important parameter for climate research and a crucial factor to achieve high accuracy in satellite geodesy and satellite altimetry. Currently Global Navigation Satellite System (GNSS) PWV retrieval using static Precise Point Positioning is limited to ground stations. We demonstrated the PWV retrieval using kinematic Precise Point Positioning method with shipborne GNSS observations during a 20‐day experiment in 2016 in Fram Strait, the region of the Arctic Ocean between Greenland and Svalbard. The shipborne GNSS PWV shows an agreement of ~1.1 mm with numerical weather model data and radiosonde observations, and a root‐mean‐square of ~1.7 mm compared to Satellite with ARgos and ALtiKa PWV. An improvement of 10% is demonstrated with the multi‐GNSS compared to the Global Positioning System solution. The PWV retrieval was conducted under different sea state from calm water up to gale. Such shipborne GNSS PWV has the promising potential to improve numerical weather forecasts and satellite altimetry.