Environmental Tests of Meteorological Radiosondes Including Dynamic Temperature and Humidity Simulation in a Wind Tunnel.

摘要

An experimental investigation of the performance of meteorological radiosondes subjected to controlled variations of humidity and temperature in an environmental wind tunnel is described. Dynamic variations in temperature between -60and 40C and in relative humidity between 0and 100percent,representative of those encountered in atmospheric flight were simulated by injecting liquid nitrogen or steam,respectively,into the wind-tunnel air supply. Tests were conducted at free-stream velocities of 15and 75ft/sec duplicating the average ascent and descent rates,respectively,of balloon-borne rawinsondes and dropsondes. Free-stream static pressures appropriate to the 300-and 700-mb levels were employed. (Author)