Sensitivity of C2 sub n to Random Variations of Windspeed, Sensible Heat Flux, and Latent Heat Flux
Abstract
The optical turbulence structure parameter, (C sub n)sq, is a primary parameter in expressions used to characterize electromagnetic energy and image propagation through the atmosphere. Examples of these expressions include the receiver coherence diameter and the atmospheric modulation transfer function. In this analysis the authors write (C sub n)sq in terms of windspeed (V), sensible heat flux (H), and latent heat flux (L'E) assuming that their values are measured or modeled. Then the authors consider the effect on 2 (C sub n)sq if estimates of H, L'E, and V are assumed to be in error or vary (that is, due to sensor error and/or natural atmospheric variations). Micrometeorological data from Davis, California, are used to comprise two case studies. The results presented include bar charts of the modeled distributions of H; L'E; the surface friction velocity, U; the temperature and specific humidity scaling parameters, T and q; the Obukhov scaling length, L; the reference level (1 m) windspeed, V sub r; and finally (C sub n)sq for each case.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1992
- Accession Number
- ADA248696
Entities
People
- Arnold Tunick
- Henry Rachele