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Research on Airborne Inar DEM Block Adjustment with Independent Model

Author: WangNingNa
Tutor: HuangGuoMan
School: Chinese Academy of Surveying and Mapping
Course: Photogrammetry and Remote Sensing
Keywords: Airborne InSAR DEM Independent model method block adjustment Absolute orientation Spatial similarity
CLC: P207
Type: Master's thesis
Year: 2011
Downloads: 122
Quote: 0
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Abstract


SAR interferometric techniques to obtain high-precision ground three-dimensional information is one of the key technologies of the SAR topographic mapping . By interferometric processing without geocoding DEM ( hereinafter referred to as slant range DEM ) , has a higher relative elevation accuracy , but because of the slant range expression can not be used directly ; interference geometric scaling errors exist , to slant range DEM elevation information to bring the error . Firstly, the slant range DEM convert from the DEM , ideological similarity transformation space model proposed absolute orientation . Slant range on the basis of this model Airborne InSAR DEM data block adjustment independent model method , solving the model orientation parameters and encryption point coordinates , to obtain highly accurate three-dimensional point . The main work of this paper are the following: 1 , oblique from DEM absolute orientation model . The characteristics of the radar side imaging , on the basis of analysis of the existing SAR conformation model , relative elevation information , the ramp from the ground away from land converted from the DEM as a rigid body , the use of space similarity transformation model space rectangular coordinates converted into camera coordinate measurement , converted Geographical coordinates , thereby establishing the functional relationship between the coordinates of the model points with the ground . 2, based on the absolute orientation model independent model method block adjustment . Based on the absolute orientation mathematical models , each aircraft to bring each felled at DEM as a cell model , the common point between the use of the model of the respective units connected into a region , orientation parameters and encryption of the operator of each model based on least squares original understood point coordinates, multi - Air with a joint regional network adjustment . 3, the absolute orientation of the test block adjustment test . Select Shaanxi Weinan data the absolute orientation test , the test results meet 1:10000 mapping accuracy requirements . Select the Maqu the data block adjustment test , the test results meet 1:50000 mapping accuracy requirements .

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > General issues > Measurement error and Adjustment
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