Method for testing sensitivity of MWTS-II to sea surface air pressure based on natural atmosphere

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

Active Publication Date: 2021-02-09
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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  • Method for testing sensitivity of MWTS-II to sea surface air pressure based on natural atmosphere
  • Method for testing sensitivity of MWTS-II to sea surface air pressure based on natural atmosphere
  • Method for testing sensitivity of MWTS-II to sea surface air 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 air pressure based on natural atmosphere, and belongs to the technical field of microwave remote sensing. The method comprises the following steps of: establishing a matching data set of MWTS-II observation brightness temperature and a natural atmosphere data set, and establishing a clear sky matching data set;calculating an MWTS-II channel weight function based on the clear sky matching data set, and respectively establishing a clear sky adjustment data set for each channel of the MWTS-II according to thedistribution rule of atmospheric layers where the peak value of the weight function of each channel of the MWTS-II is located; according to the atmospheric layers where the peak value of the weight function of each channel of the MWTS-II is located, based on the clear sky adjustment data sets, respectively establishing a test data set for testing the sea surface air pressure sensitivity for each channel of the MWTS-II; as for each channel of the MWTS-II, respectively establishing the change relation of the observation brightness temperature of each channel of the MWTS-II along with the sea surface air pressure, and completing the sensitivity test of the MWTS-II on the sea surface air pressure. According to the method, the change relation of the observation brightness temperature of each channel of the MWTS-II along with the sea surface air pressure can be reflected more truly, the sensitivity of the sea surface air pressure can be tested more accurately, and the operation is simple andeasy to implement.

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 Applications(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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