Postdeployment calibration of a tropical UHF profiling radar via surface- and satellite-based methods

However, reflectivity from calibrated profilers can reveal many atmospheric attributes beyond winds. Establishing ways to calibrate these radars even after they have been taken out of service would expand the utility of archived profiler data.

We have calibrated one operating mode of a 915-MHz profiler deployed at Manus, Papua New Guinea (1992-2001), using two methods. The first method adjusts a radar parameter until the profiler's estimate of rainfall during stratiform events closely matches surface observations. The second adjusts the parameter so that mean brightband heights observed by the profiler (July 1992-August 1994) match the mean brightband reflectivities over the profiler as observed by the TRMM Precipitation Radar (January 1998-July 2001).