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Global Surface and Upper-Air Observations

The Hong Kong Observatory acquires surface and upper-air meteorological observations through the Global Telecommunication System (GTS) of the World Meteorological Organization. At fixed time intervals, the GTS data are decoded by the HKO main computer and quality control checks are applied. Objective analyses are then carried out for data at various standard pressure levels to produce grid point values. Charts showing flight level winds, temperatures and other information are made available at the Airport Meteorological Office (AMO) for the provision of flight documentation and airway winds.

Upper-air sounding balloons are launched routinely

Upper-air sounding balloons are launched at regular times every day from King's Park Meteorological Station