Radio frequency interference detection method based on satellite passive microwave remote sensing data

Abstract

The invention discloses a radio frequency interference detection method based on satellite passive microwave remote sensing data. The method comprises the steps of data screening 1, geological positioning 2, mean processing 3, geographical indication 4 and comprehensive analysis 5, wherein in data screening 1, only land data in the satellite passive microwave remote sensing data is extracted for analysis; in the geological positioning 2, each group of data in which radio frequency interference is detected is subjected to (0.001 degree)* (0.001 degree) grid point cubic polynomial interpolation, and a position coordinate corresponding to a maximum brightness temperature value after extraction and interpolation is taken as a position of radio frequency interference; in the geographical indication 4, the geographical position distribution characteristic, brightness temperature distribution characteristic and occurrence rate of radio frequency interference can be obtained through analysis; and in the comprehensive analysis 5, the change of radio frequency interference along with time and directions can be obtained through analysis. Compared with statistics based on frequency domains and signal characteristics, the radio frequency interference detection method is well applicable to radio frequency interference detection of the satellite passive microwave remote sensing data.

Description

technical field [0001] The invention belongs to the technical field of microwave remote sensing, and more specifically relates to a radio frequency interference detection method based on satellite passive microwave remote sensing data (including SMOS, Aquarius, WindSat and other satellite data working within the frequency range of passive microwave remote sensing), which can be used for satellite It provides a reference for the application of remote sensors and radio frequency interference detection and suppression, and also provides a reference for radio management. Background technique [0002] Soil Moisture and Ocean Salinity (SMOS) satellites work in the 1400-1427MHz frequency range of passive microwave remote sensing. interference. Radio frequency interference is mainly caused by human factors, which can overwhelm the original remote sensing signal, greatly reduce data utilization and data quality, and eventually lead to a sharp decline in the quality of subsequent dat...

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Problems solved by technology

[0004] These radio frequency interferences not only have an impact on earth exploration satellites working in the passive remote sensing frequency range; they will also have a serious impact on radio astronomy telescopes working in the same frequency band and its adjacent frequency bands, resulting in reduced sensitivity or even failure to work normally; It will also cause the positioning accuracy of the navigation system in the adjacent frequency band to deteriorate or fail to locate

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