Distance corrections for single- and dual-color lasers by ray tracing
| Autor: | Eduard Berg, Jerry A. Carter |
|---|---|
| Rok vydání: | 1980 |
| Předmět: |
Atmospheric Science
Soil Science Aquatic Science Oceanography law.invention Optics Geochemistry and Petrology Approximation error law Observatory Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Water Science and Technology Physics Ecology business.industry Paleontology Humidity Forestry Laser Geophysics Space and Planetary Science Ray tracing (graphics) business Arc length Refractive index Dual color |
| Zdroj: | Journal of Geophysical Research: Solid Earth. 85:6513-6520 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jb085ib11p06513 |
| Popis: | The physical arc length difference between the red and blue beam of a dual-color laser generates an error term in determining Delta-n as well as n (the refractive index) and D (the line length). Numerical ray trace examples and theoretical approximations show that the resulting relative error Delta-D/D increases as D-squared. Error reduction by a factor of nearly 10 is possible by using the pressure, temperature, and humidity of both endpoints to calculate n. The present study results from a desire to improve the precision of monitoring the local and regional position of the Lunar Laser Ranging Observatory atop Haleakala, Maui, Hawaii; the monitoring of the earth's crustal deformation and strain is a primary concern of the study. |
| Databáze: | OpenAIRE |
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