ultraviolet radiometers, Among other things, customers use PR-Series radiometers, to remotely sense soil, sea, snow, ice and vegetation properties in frequency channels ranging from 1.4 to 89 GHz. Portable, modular, rugged PR-Series radiometers are ideal for accurate and reliable atmospheric and earth surface observations. They have been operated from aircraft, trailer, snowmobile and dogsled platforms. PR-Series radiometers of different bands can be used simultaneously to solve “custom” problems or collect research data.