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A method for testing the sensitivity of MWTS-II to sea surface pressure based on natural atmosphere

A test method and sensitivity technology, applied in the field of microwave remote sensing, can solve problems such as actual discrepancy, radiation transfer model calculation error, inaccurate sensitivity test results, etc., and achieve the effect of accurate test and simple operation.

Active Publication Date: 2022-01-07
LUOYANG NORMAL UNIV
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Problems solved by technology

However, the actual brightness temperature observed by the microwave radiometer is the result of the joint action of atmospheric parameters such as temperature, humidity, and sea surface pressure. The sensitivity test method of artificially disturbing atmospheric data not only ignores the correlation between temperature, humidity, and The calculation error of the radiation transfer model caused the sensitivity test results of the microwave radiometer channel to the sea surface pressure to be inaccurate, and even inconsistent with the actual situation.

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  • A method for testing the sensitivity of MWTS-II to sea surface pressure based on natural atmosphere
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  • A method for testing the sensitivity of MWTS-II to sea surface pressure based on natural atmosphere

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Embodiment 1

[0041] The climatological data set chosen to be used is the Interim reanalysis data set of the European Center for Medium-Range Weather Forecasting (ECMWF), the time range is from September 2018 to August 2019, and the geographical range is (25°N—45°N, 160° E—220°E), the data resolution is 0.5°×0.5°, and the pressure layer corresponding to the profile data is a 37-layer grid layered from the ground (1000 hPa) to the upper air (1 hPa): 1000 hPa, 975 hPa , 950 hPa, 925 hPa, 900 hPa, 875 hPa, 850 hPa, 825 hPa, 800 hPa, 775 hPa, 750 hPa, 700 hPa, 650 hPa, 600 hPa, 550 hPa, 500 hPa, 450 hPa, 400 hPa, 350 hPa , 300 hPa, 250 hPa, 225 hPa, 200 hPa, 175 hPa, 150 hPa, 125 hPa, 100 hPa, 70 hPa, 50 hPa, 30 hPa, 20 hPa, 10 hPa, 7 hPa, 5 hPa, 3 hPa, 2 hPa and 1 hPa. Select the temperature profile, humidity profile, cloud cover profile, cloud water profile, 2 m temperature, 2 m humidity, skin temperature, 10 m u wind speed, 10 m v wind speed and sea surface pressure in the ECMWFInterim rean...

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Abstract

The invention discloses a method for testing the sensitivity of MWTS‑II to sea surface pressure based on natural atmosphere, which belongs to the field of microwave remote sensing technology. The method includes establishing a matching data set of MWTS-II observation brightness temperature and natural atmospheric data sets, and establishing a clear sky matching data set; based on the clear sky matching data set, calculating the MWTS-II channel weight function, according to the MWTS-II each channel weight function According to the distribution law of the atmospheric layer where the peak value is located, a clear-air adjustment data set is established for each channel of MWTS-II; The test data sets for testing the sensitivity of sea surface pressure are established for each channel; for each channel of MWTS‑II, the relationship between the observed brightness temperature of each channel of MWTS‑II and the change of sea surface pressure is established, and the sensitivity test of MWTS‑II to sea surface pressure is completed. This method can more truly reflect the relationship between the observed brightness temperature of each channel of MWTS-II and the change of sea surface pressure, and conduct a more accurate test of the sensitivity of sea surface pressure, and the operation is simple and easy.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a method for testing the sensitivity of MWTS-II to sea surface air pressure based on natural atmosphere. Background technique [0002] Sea surface pressure plays an important role in applications such as numerical weather prediction, current weather analysis, and climate change research. The acquisition of high-precision sea surface pressure values ​​is one of the research hotspots in the field of earth science. The spaceborne microwave radiometer is an important detection instrument for global intensive detection of sea surface pressure. It can detect sea surface pressure by measuring the total absorption of vertical columns of oxygen. In the microwave band, the oxygen absorption line forms a resonant absorption band centered at 60 GHz. The microwave radiometer set at the 60 GHz frequency band can measure the total absorption of the vertical column of oxygen, a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/00
CPCG01L11/00G01L11/002
Inventor 贺秋瑞李德光张永新王振玲周莉高新科郭晓
Owner LUOYANG NORMAL UNIV
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