Method for inversion of sea surface air pressure by MWTS-II and MWHTS fusion

A pressure and inversion technology, applied in the field of microwave remote sensing, can solve problems such as sea surface pressure inversion that has not yet been realized, and achieve the effect of enriching sea surface pressure information, high precision, and simple operation

Active Publication Date: 2021-01-22
LUOYANG NORMAL UNIV
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AI Technical Summary

Problems solved by technology

For space-borne microwave radiometers to detect sea surface pressure, due to the limitation of space-borne platforms, sea surface pressure retrieval by fusing 60 GHz and 118 GHz detection data has not yet been realized

Method used

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  • Method for inversion of sea surface air pressure by MWTS-II and MWHTS fusion
  • Method for inversion of sea surface air pressure by MWTS-II and MWHTS fusion
  • Method for inversion of sea surface air pressure by MWTS-II and MWHTS fusion

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Embodiment 1

[0031] The brightness temperature was observed by using MWTS-II and MWHTS of Fengyun-3D star, the time range is from September 2018 to August 2019, and the geographical range is (25°N-45°N, 160°E-220°E). Match the observed brightness temperature data of MWTS-II and MWHTS according to the matching rule that the time error is less than 0.2 s and the longitude and latitude error is less than 0.01°, and then perform quality control on the observed brightness temperature in the matched data according to the screening rule of greater than 180K and less than 310K, If any observed brightness temperature in the matching data is less than 180K or greater than 310K, then discard this set of matching data, and finally form MWTS-II and MWHTS brightness temperature matching pairs as 1,060,162 pairs.

[0032]Using the European Center for Medium-Range Weather Forecasts (ECMWF) reanalysis of sea surface pressure in the dataset ERA-Interim, the time range is September 2018 to August 2019, and th...

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Abstract

The invention discloses a method for inversion of sea surface air pressure by MWTS-II and MWHTS fusion. The method comprises the following steps: establishing a brightness temperature matching pair ofMWTS-II observation brightness temperature and MWHTS observation brightness temperature in time and space; establishing a matching data set of the brightness temperature matching pair and the sea surface air pressure in time and space, and forming an analysis data set and a verification data set; training a BP neural network by utilizing the analysis data set, and sorting contribution of the observation brightness temperature of each channel to inversion of sea surface air pressure according to a training result; increasing the observation brightness temperatures of the channels one by one according to the descending order of the contribution of the observation brightness temperature of each channel to inversion of the sea surface air pressure, training a BP neural network, and an optimalchannel combination for inversion of the sea surface air pressure by MWTS-II and MWHTS fusion can be established according to the training result. Compared with a single satellite-borne microwave radiometer for inversion of the sea surface air pressure, the method can acquire higher inversion precision, and is simple and easy to operate.

Description

technical field [0001] The invention relates to a method for satellite-borne microwave remote sensing sea surface air pressure, which belongs to the technical field of microwave remote sensing, in particular to a method for merging MWTS-II and MWHTS to invert sea surface air pressure. Background technique [0002] Sea surface pressure is a basic parameter describing the state of the atmosphere and plays an important role in applications such as numerical weather prediction, tropical cyclone analysis and forecasting, and climate change research. The acquisition of high-precision sea surface pressure values ​​has always been one of the hotspots in the fields of atmospheric science and ocean science. At present, sea surface pressure data are obtained mainly through direct observation methods such as buoys, merchant ships, and airborne platform dropsondes. Direct observation data has disadvantages such as low spatial resolution, high detection cost, and inconsistent detection a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L11/00G06N3/04G06N3/08
CPCG01L11/002G06N3/084G06N3/044
Inventor 贺秋瑞张永新李德光金彦龄贾世杰任桢琴周莉
Owner LUOYANG NORMAL UNIV
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