Automatic assimilation method for multi-source thermal infrared wave band data of polar-orbit meteorological satellite

A meteorological satellite, thermal infrared technology, applied in the field of remote sensing information processing, can solve the problems of multi-source data analysis and application of backward data acquisition and update, data assimilation preprocessing is difficult to do well, etc.

Inactive Publication Date: 2008-12-17
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Meteorological satellites are a source of information that can be received free of charge, and the data are easy to share. However, the analysis and application of multi-source data lag far behind the acquisition and update of data. Among them, the difficulty of data assimilation and preprocessing is one of the important reasons.

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  • Automatic assimilation method for multi-source thermal infrared wave band data of polar-orbit meteorological satellite
  • Automatic assimilation method for multi-source thermal infrared wave band data of polar-orbit meteorological satellite
  • Automatic assimilation method for multi-source thermal infrared wave band data of polar-orbit meteorological satellite

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Embodiment Construction

[0069] The following is based on Figure 1-Figure 5 Provide a preferred embodiment of the present invention, describe in detail as follows:

[0070] 1. Select the satellite data used in the instance (see figure 2 Step 10 in , store the received data on the computer disk in IAS format after preliminary geometric correction and adding geographic information):

[0071] Taking the Yangtze River Delta region of China as the test area, the meteorological satellite data with better quality were selected according to the signal-to-noise ratio and cloud cover of the images in the test area. In the example, the Chinese polar-orbiting meteorological satellite FY1D at 7:00 on April 1, 2005, the satellite FY1D at 8:00 on April 7, and the NOAA-17 meteorological satellite data of the US NOAA series at 10:00 on April 8 were selected. , and intercept the sub-area according to the latitude (28.0746N-33.1446N) of the test area, but keep the column number 2048 of the original data unchanged. ...

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Abstract

The invention discloses a thermal-infrared band data automatic disposal method of multi-source polar orbit meteorological satellite with radiating assimilation subcourse and geometrical assimilation subcourse, which is characterized by the following: scaling the primitive data by radiation then correcting through satellite zenith angle; finishing radiation assimilation after correcting corresponding channel difference; accomplishing geometrical assimilation through distinguishability normalization, standard space projection transformation and image translation; finishing self-judgment of the same name pixel point through relative matching; reaching direct comparison of different satellite detecting radiation values without artificial operation; improving the precision of geometrical position for multi-source data; paving the base of data disposal and appliance of polar orbit satellite remote sensing data.

Description

technical field [0001] The invention relates to the field of remote sensing information processing, in particular to a method for automatically completing data assimilation in thermal infrared bands of multi-source polar-orbiting meteorological satellites. Background technique [0002] In many applications of thermal infrared remote sensing, such as the detection of atmospheric and oceanic physical phenomena, monitoring of sudden disasters (such as earthquakes, volcanic eruptions, forest fires, etc.), monitoring of pollution sources, etc., it is necessary to quickly update remote sensing images to reflect the "hour" level. change status. Polar-orbiting meteorological satellites have many advantages such as strong macroscopicity and short period, and their thermal infrared band data are very suitable for applied research in the above fields. However, due to the limitation of weather conditions and satellite time equivalence factors, relying on a single satellite cannot meet ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48G01S17/95G01S17/89
CPCY02A90/10
Inventor 尹球胡勇祝善友周宁罗庆洲巩彩兰
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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