| 摘要 |
PROBLEM TO BE SOLVED: To provide a weather radar device for an airfield, its wind observation operation method, and a wind observation system allowing wind observation even if only a few echoes from water drops such as rain and wind, which are collectively called as rainfall below, are observed for observing wind direction/velocity in a takeoff and landing route including a runway without respect to a rainfall/cloud generation condition. SOLUTION: A radar pulse is radiated from an antenna device 15 for receiving a rainfall echo, and in a signal processor 11, a rainfall condition is observed from signal magnitude of the received rainfall echo for selectively carrying out a changeover between a rainfall time observation mode and a non-rainfall time observation mode according to a rainfall condition. In the rainfall time observation mode, an echo component is observed, and the wind direction/velocity is calculated from the observation result. In the non-rainfall time observation mode, receipt signals are integrated for improving SN, and the echo component due to Bragg scattering is observed for calculating the wind direction/velocity from the observation result. COPYRIGHT: (C)2007,JPO&INPIT
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