Accession Number:

ADA055774

Title:

Measurement of 200-400 nm Solar UV Fluxes at Altitudes Up to 39 km on the Stratcom VII-A Balloon Flight.

Descriptive Note:

Final rept. Aug 76-Sep 77,

Corporate Author:

PANAMETRICS INC WALTHAM MASS

Report Date:

1977-09-01

Pagination or Media Count:

32.0

Abstract:

Solar UV fluxes in the 200-400 nm range have been measured at up to 39 km altitude on the Stratcom VII-A balloon flight. A filter-wheel UV Spectrophotometer was used to make measurements at ten wavelengths over this range. Flux vs solar zenith angle data were obtained for ascent, descentsunset, sunrise and cut-down. Ascent, descentsunset, and load cut-down gave vertical profiles of solar UV flux to below 10 km. The total ozone values derived from the UVS measured fluxes allow ozone densities to be calculated for ascent and descent which are in good agreement with the measured local ozone densities. A good measurement of the 220 nm solar flux in the ozone-oxygen atmospheric windown was made. The results is .00000327 Wsq cm-nm, and together with other measurements indicates some dependence of the 220 nm solar flux on sunspot number and 2800 MHz solar flux.

Subject Categories:

  • Atmospheric Physics
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE