Energy Balance Model for Imagery and Electromagnetic Propagation
ARMY LAB COMMAND WHITE SANDS MISSILE RANGE NM ATMOSPHERIC SCIENCES LAB
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The optical turbulence structure parameter C2n typically appears in formulations use to estimate the effects of temperature and moisture gradients on imagery and electromagnetic propagation. Temperature and moisture gradients can be approximated from sensible and latent heat flux estimates, and these fluxes can be obtained from radiationenergy balance equations. Numerous energy balance models exist requiring different kinds and numbers of inputs. The semiempirical model developed and presented in this report 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 estimate 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 C2n are compared with measured values.
- Radiofrequency Wave Propagation