Accession Number:

ADA248696

Title:

Sensitivity of C2 sub n to Random Variations of Windspeed, Sensible Heat Flux, and Latent Heat Flux

Descriptive Note:

Final rept.

Corporate Author:

ARMY LAB COMMAND WHITE SANDS MISSILE RANGE NM ATMOSPHERIC SCIENCES LAB

Personal Author(s):

Report Date:

1992-03-01

Pagination or Media Count:

34.0

Abstract:

The optical turbulence structure parameter, C sub nsq, 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 nsq in terms of windspeed V, sensible heat flux H, and latent heat flux LE assuming that their values are measured or modeled. Then the authors consider the effect on 2 C sub nsq if estimates of H, LE, and V are assumed to be in error or vary that is, due to sensor error andor 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 LE 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 nsq for each case.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE