Thursday, October 1 2020 1:47:05

CPD by Others
Code : 2017055
Event Name : Application of GPS for Hong Kong Weather Forecasting and Crustal Movement Monitoring
CPD Code : Formal Events
Speaker : Mr. WOO Wang-chun has worked as a Scientific Officer in various positions in the Hong Kong Observatory, including weather forecast, broadcast meteorology, geophysical science, time services, and currently on forecast development with an emphasis on precipitation now casting

Mr. HUI Tai-wai, David, Scientific Officer of the Hong Kong Observatory. He joined the department some 20 years ago and has been working in various fields including weather forecasting, climate modelling, hydrometeorology, broadcast meteorology and recently the geophysical science and time services.
Event Date : 28/04/2017
Event Time : 7:00 - 8:30 pm
CPD Hour(s) : 1.5
Divisional PQSL Hour(s) : 1.5
Venue : Surveyors Learning Centre, Room 1207, 12/F, Wing On Centre, 111 Connaught Road Central, Sheung Wan, Hong Kong
Division : LSD
Closing Date : 14/04/2017
Fee : HK$120 for members; HK$150 for non-members (HK$30 walk-in surcharge on all prices listed)
Priority : LSD members; First-come-first-served
Language : Cantonese supplemented by English
Details :

GPS signals experience propagation delays in the ionosphere and troposphere, partially resulting from the existence of water vapour. Through analysing the delays, the content of water vapour known as Precipitable Water Vapour (PWV) in the atmosphere could be derived for weather forecast. The Hong Kong Observatory (HKO) has been operating a system that collects GPS data from the ground stations in Hong Kong and Guangdong for monitoring the evolution of rainstorms in the region. The speaker, Mr. WOO Wang-chun, would like to share with us how the HKO makes use of such information for monitoring and forecasting the weather.


Apart from weather forecasting, HKO has also employed the GPS technology to monitor the crustal movement. Through continuous monitoring of the movement of GPS station at Tate's Cairn since 2006 and comparison of the measurement results among other locations in Hong Kong, it is found that this area has been steadily drifting east-southeastward at an average speed of about 3cm a year. The speaker, Mr. HUI Tai-wai, David, would like to share with us their approaches and result of the project.