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

A passive microwave remote sensing and radio frequency interference technology, which is applied in the field of microwave remote sensing, can solve the problems of poor positioning accuracy, inability to locate, and malfunction of the navigation system

Active Publication Date: 2015-04-22
HUAZHONG UNIV OF SCI & TECH +1
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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 freq

Method used

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

Examples

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Embodiment 1

[0040] Example 1: Radio frequency interference of SMOS satellite data in China

[0041] In this embodiment, using the radio frequency interference detection method proposed above, by processing the L1-c level data provided by the SMOS satellite on August 18, 2013-August 20, 2013, obtained: the L-band radio frequency interference in China location distribution, such as figure 2 shown; the geographical coordinates of radio frequency interference in China are given in Table 1. exist figure 2 In , the black dots indicate the location of the RF interference and its source.

[0042] Table 1 Geographic coordinates of radio frequency interference in China

[0043] RFI source name

latitude / longitude

RFI source name

latitude / longitude

Beijing

116.3340.00

Xi'an, Shaanxi

108.9634.26

Tianjin

117.1539.15

Shaanxi Baoji

107.2734.39

Shanghai

121.5631.83

Hanzhong City, Shaanxi

106.9633.01

Guangzhou, Guangd...

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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...

Claims

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Application Information

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IPC IPC(8): H04B17/345H04B7/185
Inventor 李青侠李浩卢海梁李一楠李炎徐珍
Owner HUAZHONG UNIV OF SCI & TECH
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