| タイトル | A Microwave Radiometric Method to Obtain the Average Path Profile of Atmospheric Temperature and Humidity Structure Parameters and Its Application to Optical Propagation System Assessment |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150008348 |
| 著者（英） | Vyhnalek, Brian E.; Manning, Robert M. |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 2015-02-08 |
| 言語 | eng |
| 内容記述 | The values of the key atmospheric propagation parameters Ct2, Cq2, and Ctq are highly dependent upon the vertical height within the atmosphere thus making it necessary to specify profiles of these values along the atmospheric propagation path. The remote sensing method suggested and described in this work makes use of a rapidly integrating microwave profiling radiometer to capture profiles of temperature and humidity through the atmosphere. The integration times of currently available profiling radiometers are such that they are approaching the temporal intervals over which one can possibly make meaningful assessments of these key atmospheric parameters. Since these parameters are fundamental to all propagation conditions, they can be used to obtain Cn2 profiles for any frequency, including those for an optical propagation path. In this case the important performance parameters of the prevailing isoplanatic angle and Greenwood frequency can be obtained. The integration times are such that Kolmogorov turbulence theory and the Taylor frozen-flow hypothesis must be transcended. Appropriate modifications to these classical approaches are derived from first principles and an expression for the structure functions are obtained. The theory is then applied to an experimental scenario and shows very good results. |
| NASA分類 | Optics; Earth Resources and Remote Sensing |
| レポートNO | GRC-E-DAA-TN20911 |
| 権利 | No Copyright |
