| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: surface controlled area is irradiated at azimuth angle ?1.Reflected signal is recorded that allows detection from changed signal level of the surface abnormal area, signal being reflected therefrom features lower level compared with background signal magnitude. Then, controlled area is irradiated at azimuth angle ?2 at the same radio wave incidence angle to record the signal reflected from abnormal and background areas. Signals from abnormal areas obtained at irradiation at azimuth angles ?1 and ?2 and those from background area obtained at irradiation at azimuth angles ?1 and ?2 are interrelated. Said relationships are compared to define availability of contamination of analysed surface.EFFECT: higher probability of detection of contamination and lower probability of false alarms.1 cl, 1 dwg |
