Method for monitoring landslide in real time by using SBAS technology
A real-time monitoring and technical technology, applied in the direction of using re-radiation, measuring devices, radio wave measuring systems, etc., can solve problems such as no advantages, large field workload, and large consumption of human, material, and financial resources.
Pending Publication Date: 2021-01-12
SPEED SPACE TIME INFORMATION TECH CO LTD
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At the same time, affected by heavy rainfall, landslide geological disasters occur more frequently in Aba Prefecture. Landslide geological disasters have a large impact range, large deformation, and strong suddenness. Conventional measurement methods (such as GPS, precision leveling, etc.) exist The following defects: 1) a large workload in the field; 2) a large amount of manpower, material and financial resources are required; 3) the layout points are affected by the terrain; 4) the degree of automation is not high; no advantage
[0005] At present, although SBAS technology is widely used in landslide disaster monitoring, compared with PSI technology, its accuracy at highly coherent PS points is not high, and in the mountainous area of Aba Prefecture where landslide disasters occur frequently, GPS and level There are also certain difficulties in the layout of the points, which also makes the SBAS technology have no other measurement results for comparison after the measurement results are obtained, and the accuracy of the results cannot be guaranteed
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[0047] A method for real-time monitoring of landslides using SBAS technology, comprising the following steps:
[0048] Step 1. Select the SAR image data source.
[0049] The radar remote sensing satellite SAR image data source is selected, and the landslide area to be monitored is completely covered in the research time and geographic space dimensions. Among them, the radar remote sensing satellite should continue to operate normally in the same orbit for more than one year. The plane resolution of the SAR image data is m level, and the coverage space is highly overlapping and completely covers the landslide area to be monitored.
[0050] Step two, data preprocessing.
[0051] Select 9 pieces of SAR image data from the radar remote sensing satellite SAR image data source, and the time interval between the 9 pieces of SAR image data is 1s-5s. Among them, the number of the first SAR image data is N-4, and the number of the second SAR image data is N-4. The number of the data i...
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The invention discloses a method for monitoring landslide in real time by using an SBAS technology. The method comprises the following steps: step 1, selecting an SAR image data source; step 2, carrying out data preprocessing; step 3, selecting a landslide area which is mainly monitored; step 4, carrying out registration of SAR images; step 5, selecting an interference pair; step 6, decomposing anInSAR time sequence result by wavelet variation; step 7, selecting a ground stable point; step 8, estimating a residual terrain phase; step 9, removing the atmospheric phase and residual error; step10, analyzing a result.
Description
technical field [0001] The invention relates to synthetic aperture radar interferometry technology, in particular to a method for real-time monitoring of landslides using SBAS technology. Background technique [0002] Aba Tibetan and Qiang Autonomous Prefecture in Sichuan Province (abbreviated as Aba Prefecture) is located in the northwest of Sichuan Province. Aba Prefecture is located on the southeastern edge of the Qinghai-Tibet Plateau, at the junction of the northern end of the Hengduan Mountains and the alpine valleys in northwestern Sichuan. Its landforms are mainly plateaus and alpine valleys. The southeast is the alpine valley area, the central part is the mountain plain area, and the northwest is the plateau area. Earthquakes occur frequently in Aba Prefecture, such as the "5.12 Wenchuan Earthquake" in 2008 and the "8.8 Jiuzhaigou Earthquake" in 2017, which are among the most influential earthquakes. Aba Prefecture is located in the structural fault zone, earthquak...
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IPC IPC(8): G01S13/90
CPCG01S13/9023
Inventor 郝本明胡波朱必亮
Owner SPEED SPACE TIME INFORMATION TECH CO LTD