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Proceedings Paper

Energy balance model for imagery and electromagnetic propagation
Author(s): Henry Rachele; Arnold Tunick
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Paper Abstract

The optical turbulence structure parameter Cn2 typically appears in formulations used to estimate the effects of temperature and moisture (gradients) on imagery and electro- magnetic propagation. Temperature and moisture gradients can be approximated from sensible and latent heat flux estimates, and these fluxes can be obtained from radiation/energy balance equations. Numerous energy balance models exist requiring different kinds and numbers of inputs. The semiempirical model developed and presented in this paper was constrained to require a minimum number of conventional measurements at a reference level (2 m). These measurements include temperature, pressure, relative humidity, and windspeed. The model also requires a judgment of soil type and moisture (dry, moist, or saturated), cloud characteristics (tenths of cloud cover and density and an estimation of cloud height), day of the year, time of day, and longitude and latitude of the site of interest. Model estimates of net radiation, sensible and latent heat fluxes, and Cn2 are compared with measured values.

Paper Details

Date Published: 1 August 1992
PDF: 31 pages
Proc. SPIE 1688, Atmospheric Propagation and Remote Sensing, (1 August 1992); doi: 10.1117/12.137907
Show Author Affiliations
Henry Rachele, U.S. Army Atmospheric Sciences Lab. (United States)
Arnold Tunick, U.S. Army Atmospheric Sciences Lab. (United States)

Published in SPIE Proceedings Vol. 1688:
Atmospheric Propagation and Remote Sensing
Anton Kohnle; Walter B. Miller, Editor(s)

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