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II analog water body water leaving radiance inversion method

A technology of radiance and water body, applied in the field of satellite remote sensing data processing

Active Publication Date: 2011-02-16
常熟紫金知识产权服务有限公司
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for retrieving radiance from water of type II water body, so as to solve the problem of atmospheric correction of water color remote sensing of type II water body

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  • II analog water body water leaving radiance inversion method
  • II analog water body water leaving radiance inversion method
  • II analog water body water leaving radiance inversion method

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Embodiment Construction

[0022] The active satellite sensor of the embodiment provided by the present invention adopts the CALIOP sensor carried on the CALIPSO satellite, and the passive satellite sensor adopts the MODIS sensor carried on the Aqua satellite. The center wavelength of the shorter wavelength channel of the CALIOP sensor is 532nm, which is only 1nm different from the center wavelength of the 531nm band used for chlorophyll concentration detection in the passive satellite sensor used in water color remote sensing. Taking advantage of this consistency between the two, the CALIOP aerosol optical depth inversion value is used to improve the aerosol optical depth inversion results of the water color remote sensing data, and then realize the high-precision atmospheric water color satellite remote sensing images of the II water body area Correction. Especially for the MODIS / Aqua sensor whose transit time is only about 1 minute and 30 seconds different from the CALIPSO satellite, the aerosol data...

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Abstract

The invention relates to a class II water body water-leaving radiance inversion method, which utilizes the advantage that surface signals have little influence on an active satellite sensor when detecting atmosphere and combines detection results of a passive satellite sensor to obtain the improved data of optical thickness distribution of high precision atmospheric aerosol above the class II water body and acquire the influence of aerosol radiation according to the data through the correlativity analysis between aerosol optical thicknesses obtained from two detection modes above a low reflection area, thereby realizing the inversion of the class II water body water-leaving radiance and achieving the purpose of atmospheric correction by combining the remote sensing modes of active and passive satellites and auxiliary water color remote sensing data. The method adopts the technical proposal having the prospects of business-based promotion and application, and the precision is higher than that of the existing other business-based methods.

Description

technical field [0001] The invention belongs to the technical field of satellite remote sensing data processing, and in particular relates to a method for retrieving radiance from water of type II water body. Background technique [0002] At present, the general operational water color remote sensing atmospheric correction methods rely on passive satellite sensors, mainly using the characteristics of strong absorption of water bodies in the near-infrared band. The spectral expansion of aerosol radiation, and finally the atmospheric correction of water color remote sensing. This method is relatively mature, and a standard atmospheric correction algorithm for water color remote sensing has been established in data processing. However, this scheme is not suitable for turbid water, because the concentration of suspended sediment and chlorophyll in turbid water is relatively high, and the backscattering in the near-infrared band is relatively strong, so that the radiance from th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/88G01S17/95G01S7/497G01S7/48
CPCY02A90/10
Inventor 田礼乔陈晓玲龚威马盈盈陆建忠陈莉琼张伟于之锋朱忠敏
Owner 常熟紫金知识产权服务有限公司