Research about Sounding Atmosphere Based on GNSS Radio Occultation

Tracking of the radio signals broadcast by the Global Navigation Satellite System (GNNS) satellites as they are occulted from a GNNS receiver by the Earth´s atmosphere can provide high resolution vertical profiles of atmospheric refractivity, temperature and water vapour.The phenomenon is regarded as Sounding Atmosphere based on GNSS Radio Occultation(GNSS RO).Compared to traditional radiosonde and radar probing, the GNSS RO is a powerful tool for atmospheric sounding, which have many traits such as no calibration, all-weather, almost uniform global coverage, high precision and vertical resolution. In this paper, investigative actuality which we make use of GNSS RO technique get atmosphere parameters like temperature, air pressure and humidity is introduced. At the same time, development direction of GNSS RO in the weather domain is put forward; undoubtedly, it will boost up use of GNSS RO technique for global climate.