SCATTERED ULTRAVIOLET-RADIATION IN THE UPPER-STRATOSPHERE .2. MODELS AND MEASUREMENTS

Scattered ultraviolet radiation in the 40 to 46 km altitude range is e valuated using an analytic, single-scattering description and results from the atmospheric ultraviolet radiance integrated code (AURIC). The calculations are compared with measurements obtained from a balloon-b orne spectrometer at 1.5-nm resolution. The analytic approach is usefu l for approximating the angular and spectral dependence of scattered U V radiation; however, use of a single scale height to describe the ver tical distribution of absorbers and scatterers leads to errors of 50% or greater at intermediate ozone opacities. Results from AURIC general ly are compatible with the observations, particularly below 210 nm whe re large discrepancies have been noted in prior model/measurement comp arisons.