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Ray tracing evaluation of a technique for correcting the refraction errors in satellite tracking data
Applied Optics
|March 6, 2010
Summary
Satellite laser tracking can achieve centimeter-level range resolution. This is feasible for satellite elevation angles above 10 degrees with corrected tracking data.
Area of Science:
- Geodesy
- Satellite Geodesy
- Atmospheric Science
Background:
- Satellite laser tracking (SLT) is crucial for precise orbit determination and Earth science.
- Atmospheric refraction introduces errors in SLT range measurements.
- Accurate modeling of atmospheric effects is essential for high-precision geodesy.
Purpose of the Study:
- To evaluate the impact of atmospheric refraction on SLT data accuracy.
- To determine the feasibility of achieving centimeter-level range resolution in SLT.
- To assess the effectiveness of different correction formulas for refraction errors.
Main Methods:
- Ray tracing simulations were performed using three-dimensional (3-D) refractivity profiles.
- Analysis of simulated SLT data to quantify refraction-induced range errors.
- Application and evaluation of spherical and gradient correction formulas.
Main Results:
- Refraction errors were successfully modeled using ray tracing through 3-D refractivity profiles.
- A range resolution of 1 cm or less was found to be feasible.
- Feasibility is contingent upon satellite elevation angles exceeding 10 degrees.
Conclusions:
- Centimeter-level range resolution in SLT is achievable.
- Effective correction of tracking data using spherical and gradient formulas is key.
- The findings support enhanced precision in satellite laser tracking applications.
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