PhD graduate Yangzhao Gong from the Department of Land Surveying and Geo-Informatics (LSGI), Faculty of Construction and Environment, The Hong Kong Polytechnic University (PolyU), recently received a Young Author Best Paper Award (the third order) at the 12th China Satellite Navigation Conference (CSNC), Nanchang, China, 26 to 28 May 2021. The awarded paper was entitled “Augmenting GNSS PPP Accuracy in South China Using Water Vapor Correction Data from WRF Assimilation Results,” in which atmospheric water vapor data were remotely sensed by a network of GNSS ground receivers and then assimilated into the Weather Research and Forecasting model (a widely used Numerical Weather Prediction model). The water vapor data forecast by the WRF model were then utilized to correct the atmospheric errors in GNSS observations. The test results in the South China region showed that the accuracy of GNSS positioning and navigation solution can be significantly improved by 25% to 35% in static mode and 15% to 26% in kinematic mode.
This work was conducted under the supervision of Prof. George Liu of LSGI. Coauthored with Prof. George Liu, Mr. Pak Wai Chan and Mr. Kai Kwong Hon, both from the Hong Kong Observatory (HKO), this paper exemplified the importance of cross-disciplinary collaborative research between the GNSS and the meteorological communities. In addition to the use for precise GNSS positioning and navigation, accurate water vapor products have a wide range of applications in various research and application fields such as atmospheric science, climate change, and Earth Observation missions.
The CSNC conference, annually hosted by the Academic Exchange Center of the China Satellite Navigation Office, virtually is the largest international conference in the world in the field of Global Navigation Satellite System (GNSS). More than 5000 GNSS-related researchers participated in the CSNC conference in 2021.
Congratulations to Yangzhao!
