Data fusion method and system for monitoring aerosol optical thickness by polar orbit satellite

A technology of optical thickness and data fusion, applied in instruments, character and pattern recognition, computer parts, etc., can solve problems such as inability to monitor all-weather haze, and achieve the effect of strong practicability, novel ideas and clear processes

Active Publication Date: 2019-01-25
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The invention provides a data fusion method and system for monitoring aerosol optical thickness by polar-orbiting satellites to

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  • Data fusion method and system for monitoring aerosol optical thickness by polar orbit satellite
  • Data fusion method and system for monitoring aerosol optical thickness by polar orbit satellite
  • Data fusion method and system for monitoring aerosol optical thickness by polar orbit satellite

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Embodiment 1

[0050] The data fusion method for monitoring aerosol optical depth by polar-orbiting satellites of the present embodiment includes the following steps:

[0051] (1) Daily polar-orbiting satellite data acquisition.

[0052] Determine the observation area G, and divide the area G into S×R grids. According to the daily orbit reports of MODIS polar-orbiting satellites and FY series polar-orbiting satellites, the number n of satellites passing through area G is obtained. Sort each passing satellite according to the time sequence of the day's transit, and number it as ST 1 , ST 2 ···ST n .

[0053] (2) Calculation of satellite monitoring values ​​of aerosol optical depth.

[0054]According to the sequence of satellites determined in step (1), the daily transit satellite data are received, and the aerosol optical depth on the grid point is calculated. For S×R grids, if the satellite does not pass through the grid point, the aerosol optical depth Thickness takes a value of 0. T...

Embodiment 2

[0084] This embodiment is an application example of Embodiment 1, and this embodiment is described by taking satellite monitoring of aerosol optical depth in a certain province on a certain day as an example for fusion calculation. This embodiment includes the following steps:

[0085] (1) Polar-orbiting satellite data acquisition.

[0086] Determine the observation area as 20°N-30°N, 105°E-115°E, marked as G, and divide the area G into 10×10 grids. According to the orbit reports of MODIS polar-orbiting satellites and FY series polar-orbiting satellites on that day, the number of satellites passing through area G3 is obtained. Sort each passing satellite according to the time sequence of the day's transit, and number it as ST 1 , ST 2 , ST 3 .

[0087] (2) Calculation of satellite monitoring values ​​of aerosol optical depth.

[0088] According to the sequence of satellites determined in step (1), receive the daily transit satellite data, and judge whether the satellite ...

Embodiment 3

[0115] This embodiment provides a data fusion system for monitoring aerosol optical depth by polar-orbiting satellites, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, any of the above-mentioned Example steps.

[0116] In summary, based on the ground observation results, the present invention evaluates the inversion quality of the aerosol optical depth retrieved by different polar-orbiting satellites. According to the inversion quality, the fusion weights of different polar-orbiting satellite data are constructed, respectively. The satellite monitoring of aerosol optical depth at each point is fused to obtain the distribution of aerosol optical depth in the whole region.

[0117] The invention adds ground observation information to satellite observation information, the process is intuitive and simple, the accuracy rate is high, the monitoring accuracy of pollution is ...

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Abstract

The invention discloses a data fusion method and system for monitoring aerosol optical thickness by a polar orbit satellite. The method comprises the following steps: dividing an observation area intoa plurality of grids, and obtaining satellite monitoring values of aerosol optical thickness of each grid; Collect ground-based observations of aerosol optical depth recorded at each ground-based observation point at the time of transit of each satellite; Calculating a correction value of the aerosol optical depth of each satellite at a grid point and a weight of each satellite according to the position of the ground observation point and the ground observation value of the aerosol optical depth and the satellite monitoring value of the aerosol optical depth of each grid point; According to the weights, the aerosol optical depth of all satellites in each grid is calculated synthetically to obtain the aerosol optical depth. The invention adds the ground observation information to the satellite observation information, improves the monitoring accuracy of pollution, improves the utilization rate of the satellite information in the wide-area monitoring of pollutants, and has clear calculation flow and high practicability.

Description

technical field [0001] The invention relates to the technical field of smog monitoring, in particular to a data fusion method and system for monitoring aerosol optical thickness by polar-orbiting satellites. Background technique [0002] With the development of industrialization and the expansion of urbanization, atmospheric smog occurs frequently in the central and eastern regions of China. In severe cases, aircraft are grounded and schools are closed, which affects people's normal production, life, health and safety. Studies have shown that one of the main causes of persistent smog is the increase in pollutant emissions, and industrial production is the main source of emissions. [0003] Environmental protection departments usually use ground observation points to monitor pollution, but due to the sparse distribution of stations, they cannot cover the entire area, resulting in incomplete monitoring. With the development of satellite remote sensing technology, satellite mo...

Claims

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Application Information

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IPC IPC(8): G06K9/62
CPCG06F18/251
Inventor 陆佳政冯涛徐勋建郭俊蔡泽林邸悦伦李丽怀晓伟
Owner STATE GRID HUNAN ELECTRIC POWER
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