Atmospheric Noise in Interferometer Radars -Observaf/ons on GE Mod III Tracking System

Recent low elevation angle space missions have provided a means of detecting random atmospheric propagation noise in range rate difference radar data while tracking a moving target. The range rate difference data noise increases as the elevation angle approaches the horizon. The noise increases as an approximate function of E esc 2 E down to about 4 degrees elevation and increases less rapidly below 4 degrees