Device and method of using radar remote sensing data for monitoring wheat lodging

A technology of remote sensing data and wheat, applied in the direction of measurement device, utilization of re-radiation, radio wave measurement system, etc., can solve problems such as lack of means of wheat lodging status

Active Publication Date: 2014-08-06
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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  • Description
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: there are certain limitations in monitoring the lodging status of wheat based on optical remote sensing spectrum technology, and the problem of lack of means for quickly monitoring the lodging status of wheat in large areas

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  • Device and method of using radar remote sensing data for monitoring wheat lodging
  • Device and method of using radar remote sensing data for monitoring wheat lodging
  • Device and method of using radar remote sensing data for monitoring wheat lodging

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Embodiment Construction

[0063] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0064] Embodiments of the present invention propose a method for monitoring wheat lodging using radar remote sensing data, such as figure 1 shown, including the following steps:

[0065] S1: Obtain the full polarization SAR remote sensing image of the monitoring area;

[0066] S2: process the synthetic aperture radar remote sensing image, and extract the backscatter coefficients of different polarization channels; specifically include: performing radiation calibration on the four polarization channels of the synthetic aperture radar remote sensing image; Generating intensity data from the complex data of each polarization channel; performing geocoding on the intensity data of each polarization channel; performing geometric fine correction and speckle noise removal processing on the geocoded image data.

[0067] Wherein, the intensity data generated fro...

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Abstract

The invention relates to a device and a method of using radar remote sensing data for monitoring wheat lodging. The method includes: acquiring a completely-polarized synthetic-aperture radar remote-sensing image of a monitored area; processing the synthetic-aperture radar remote-sensing image and extracting back scattering coefficients of different polarization channels; extracting plot units of a wheat planting region in the monitored area; calculating an average back scattering coefficient, on different polarization channels, of all pixels of each plot unit, and using the average back scattering coefficient to set up a polarization index; using the polarization index as a judgment index to judge wheat lodging conditions. Using the method and device can realize large-area quick and accurate monitoring of the wheat lodging conditions to well know wheat lodging occurrence range and severity, and well knowing the wheat lodging occurrence range and severity is critical for disastrous situation diagnosis, timely prevention and control and loss assessment; the radar remote-sensing data is insusceptible to weather, radar remote-sensing observation is pretty sensitive to structural change, and using completely-polarized synthetic-aperture radar data for monitoring lodging is more advantageous.

Description

technical field [0001] The invention relates to the technical field of agricultural disasters and radar remote sensing applications, in particular to a method and device for monitoring wheat lodging by using radar remote sensing data. Background technique [0002] Wheat lodging is one of the common disasters in agricultural production. Once wheat lodging occurs, the water, nutrient operation and photosynthesis of the plant will be reduced, and various diseases and insect pests will be induced, which will seriously affect the grain filling process, and finally affect the formation of wheat yield and grain quality. In severe lodging, the yield loss can reach 27%. . In addition, because lodging is not conducive to mechanical harvesting, the increase in labor harvesting costs will also aggravate the loss of farmland income. Large-scale and rapid monitoring of wheat lodging is the key to mastering disasters, timely prevention and control, and assessing losses. It is of great va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/90
CPCG01S7/41G01S13/90G01S13/9027
Inventor 赵春江杨浩杨贵军杨小冬徐新刚顾晓鹤宋晓宇张竞成董彦生冯海宽
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI
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