Solar Illumination Calculator

reportActive / Technical Report | Accession Number: ADA040091 | Open PDF

Abstract:

A model of the earths orbital relationship to the sun is developed. Equations for computing the solar declination, the equation of time, sunrise, sunset, the starting and ending times of the twilights, and the solar elevation and azimuth angles are developed. An explanation of the meaning of the cosine of the Greenwich Hour Angle Exceeding or - 1.0 is given. The accuracy of the equations is discussed. The equations presented in this report were incorporated into a computer program written at USAFETAC for use by the World Wide Military Command and Control System WWMCCS.

Author(s):
Goldsmith, Richard A.
Author Organization(s):
AIR FORCE ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER SCOTT AFB IL
Descriptive Note:
Technical rept.
Supplementary Note:
DOI: 10.21236/ADA040091
Pagination:
0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Availability: Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
USAFETAC-7261
Monitor Series:
7261, USAFETAC
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_6_Net Centric; JCA_6.4.1_Secure Information Exchange; JCA_6.4_Information Assurance
Modernization Areas:
Fully Networked C3
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*SUNSET, *COMPUTATIONS, *SUNRISE, ORBITS, TIME, COORDINATES, EQUATIONS, ELEVATION, AZIMUTH, DAYLIGHT, CELESTIAL MECHANICS, SUN, TWILIGHT
Field(s)/Group(s):
Astronomy, Celestial Mechanics
Keyword(s):
EQUATION OF TIME
Report Date:
1977 Feb 01