Zenith Tropospheric Delay	Precipitable Water Vapor

The map images above show the real-time ZTD (left) and PWV (right) over the Japanese islands. It is processed at Nippon GPS Solutions (NGS), Tokyo, Japan, with RTNet software. PWV is mapped from forecast pressures from Clock for Weather (CFW) GPS enhanced forecast system. True real-time processing of tropospheric delay and other GPS estimates such as coordinate and inospheric delays are possible to be provided with RTNet software with real-time.

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ZTD forecast in the eastern asian region.