Accession Number:

ADA525090

Title:

Horizon Brightness Revisited: Measurements and a Model of Clear-Sky Radiances

Descriptive Note:

Journal article

Corporate Author:

NAVAL ACADEMY ANNAPOLIS MD

Personal Author(s):

Report Date:

1994-07-20

Pagination or Media Count:

10.0

Abstract:

Clear daytime skies persistently display a subtle local maximum of radiance near the astronomical horizon. Spectroradiometry and digital image analysis confirm this maximums reality, and they show that its angular width and elevation vary with solar elevation, azimuth relative to the Sun, and aerosol optical depth. Many existing models of atmospheric scattering do not generate this near-horizon radiance maximum, but a simple second-order scattering model does, and it reproduces many of the maximums details.

Subject Categories:

  • Atmospheric Physics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE