For airand spaceborne weather radars, which typically operate at frequencies of 10 GHz and above, attenuation correction is usually an essential part of any rain estimation procedure. For ground-based radars, where the maximum range within the precipitation is usually much greater than that from airor spaceborne radars, attenuation correction becomes increasingly important at frequencies above ...

A prototype Validation Network (VN) is currently operating as part of the Ground Validation System for NASA’s Global Precipitation Measurement (GPM) mission. The VN supports precipitation retrieval algorithm development in the GPM prelaunch era. Postlaunch, the VN will be used to validate GPM spacecraft instrument measurements and retrieved precipitation data products. The period of record for ...

In this work, the feasibility of estimating rain rate based on polarimetric Global Navigation Satellite Systems (GNSS) signals is explored in theory. After analyzing the cause of polarimetric signals, three physical-mathematical relation models between co-polar phase shift (KHH, KVV), specific differential phase shift (KDP), and rain rate (R) are respectively investigated. These relation models...

F1.1 Terrestrial Fixed Radio Systems Active studies of rain attenuation characteristics are continuing for developing broadb quasi-millimeter wave band. It is based on a trend that the use of microwave band gradually from the fixed use to the mobile use. Results of those stu and systems above has been changing dies will be reflected in developing a multipoint-to-multipoint system, a mesh type w...

Cell area coverage and cell-site diversity in mm-wave fixed cellular systems were studied by simulating radio paths and cells on radar images. Coverage was computed by considering the joint impact of rain attenuation and lognormal shadowing loss. A prediction model was developed for diversity gain as a function of angular separation between the serving hubs, which might be at different distance...

Although is not a major error source at C-band, attenuation may degrade the radar measurement to a considerable degree in situations like a precipitation event in the radar shadow of a strong convective cell, or may affect precipitation accumulation estimates at distances far from the radar site. For C-band radars, attenuation can be corrected using different methods depending on the type of me...