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Multi-parameter adjustment for high-precision azimuthal intersection positioning.
Songtao Ai1, Shansi Wang1, Yuansheng Li2
1Chinese Antarctic Center of Surveying & Mapping, Wuhan University, Wuhan 430079, China.
Methodsx
|July 10, 2020
Summary
This study introduces a multi-parameter adjustment method for precise 3D positioning, improving upon traditional techniques by incorporating Earth curvature and atmospheric refraction corrections for greater accuracy.
Area of Science:
- Geomatics Engineering
- Photogrammetry
- Geodetic Surveying
Background:
- Traditional azimuthal intersection methods have limitations in accuracy, especially with varying distances between control stations.
- Simple height averaging is not rigorous due to inconsistent intersection distances.
Purpose of the Study:
- To develop a high-precision 3D positioning method overcoming limitations of traditional techniques.
- To enhance the accuracy of azimuthal intersections regardless of station quantity or distance.
Main Methods:
- A multi-parameter adjustment model was developed, integrating traditional space intersection principles.
- Earth curvature correction and atmospheric refraction correction models were incorporated into the adjustment process.
Main Results:
- The proposed method demonstrates robustness with varied distances between control stations and intersections.
- The inclusion of correction models significantly improves the accuracy of intersected points compared to traditional methods.
Conclusions:
- The multi-parameter adjustment method offers a rigorous and accurate approach to high-precision 3D positioning.
- This method is adaptable and not limited by the number or configuration of control stations.
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