Abstract:

Combining with a radar height error alarm case in Dalian sounding station on July 26 of 2011, the height error alarm mechanism was analyzed based on its formation mechanism, and reasons of errors and their solutions were summarized. The results show that height errors are caused by pressure "flying spot", incorrect distance tracking tolerance, sidelobe radar tracking, deviation because of lowering the gain arising from "Flying point "tolerance level alarm and ultra poor weather conditions and so on. Causes and solutions of height error are summarized in terms of three aspects, i.e. recurring deviation alarm, occasionally tolerance alarm and special weather-induced tolerance alarm. The results could provide references for aerological sounding.

Key words: L-band radar, Pressure altitude, Spherical coordinate’s height, Height error