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A target positioning precision optimization method based on multi-type surveying and mapping satellite repeated observation

A technology for observing targets and positioning accuracy, applied in satellite radio beacon positioning systems, measuring devices, structured data retrieval, etc., to meet application requirements and improve positioning accuracy

Inactive Publication Date: 2019-04-09
中国人民解放军32021部队
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, the uncontrolled positioning results of targets based on repeated observations by surveying and mapping satellites are relatively independent, and there are only random accidental errors and gross errors

Method used

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  • A target positioning precision optimization method based on multi-type surveying and mapping satellite repeated observation
  • A target positioning precision optimization method based on multi-type surveying and mapping satellite repeated observation
  • A target positioning precision optimization method based on multi-type surveying and mapping satellite repeated observation

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Embodiment Construction

[0035] This embodiment is mainly based on the uncontrolled positioning result of a certain type of surveying and mapping satellite repeated observation.

[0036] Take the target field control measurement results as the benchmark, respectively calculate the error of the optimized estimation value of the target based on the repeated observation of a certain type of surveying and mapping satellite uncontrolled positioning result and the median error of the single observation uncontrolled positioning result, and evaluate the optimized estimation by comparing the sizes of the two effect. The smaller the value of the median error, the higher the accuracy of target positioning.

[0037] Set the target field control measurement Gauss coordinate value as (X outer ,Y outer ,H outer ); Based on a certain type of surveying and mapping satellite observation uncontrolled positioning Gaussian coordinates (X i ,Y i ,H i ), where i=1, 2,...,n, n is the number of repeated observations; the opt...

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Abstract

The invention discloses a target positioning precision optimization method based on multi-type surveying and mapping satellite repeated observation. in order to improve the positioning precision of asatellite repeated observation target, the single observation positioning precision and the nominal overall positioning precision of the satellite are utilized; The method comprises the following steps: establishing an error model, carrying out standardization processing on residual errors to correct a weight function, determining an optimal harmony coefficient through satellite simulation data and actual observation data experiments, eliminating or reducing the weight of an observation value with abnormal error distribution, and optimizing a target repeated observation positioning result to improve the positioning precision of the target repeated observation positioning result.

Description

Technical field [0001] The invention relates to a target positioning accuracy optimization technology under repeated observation positioning conditions. Background technique [0002] Surveying and mapping satellites conduct multiple coverage observations in the same area with a high frequency. Each time the satellite is effectively taken, the ground application system produces a positioning result and accuracy. These results are almost completely different. With the increase of surveying satellites with different resolutions and different photographic image scales, the positioning solutions of the same target on the ground also increase correspondingly, and the positioning accuracy of different types of satellites is different. Therefore, how to mine the massive observation data of surveying and mapping satellites, optimize the positioning results of repeated observations, and improve the positioning accuracy of the target points is a problem worthy of study. [0003] According to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/2458G06F16/29G01S19/42
Inventor 吴世英杨俊峰柳丽锦晓曦李保东张志恒王海岩董小环
Owner 中国人民解放军32021部队