Quantitative estimates of the brightness of the terrestrial halo at specific distances from within the shadow cone of the earth have been obtained by a method that combines refraction and multiple scattering theory with observed twilight phenomena. Results are presented for a range of radial altitudes from 10,000 km to 250,000 km. Both the luminance, or surface brightness, of the atmospheric halo and the total brightness, or illumination, received by an observer within this altitude range are given. 27 pp. Bibliog.
This report is part of the RAND Corporation Paper series. The paper was a product of the RAND Corporation from 1948 to 2003 that captured speeches, memorials, and derivative research, usually prepared on authors' own time and meant to be the scholarly or scientific contribution of individual authors to their professional fields. Papers were less formal than reports and did not require rigorous peer review.
This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit www.rand.org/pubs/permissions.
The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.