[IEEE Third International Kharkov Symposium 'Physics and Engineering of Millimeter and Submillimeter Waves' - Kharkov, Ukraine (15-17 Sept. 1998)] Third International Kharkov Symposium 'Physics and Engineering of Millimeter and Submillimeter Waves'. MSMW'98. Symposium Proceedings (Cat. No.98EX119) - Monitoring spatially - temporary distributions of fields of harmful impurities in atmosphere by methods of microwave sounding it from a surface of the earth and from space