Accession Number : AD0704141
Title : GRAPHS OF THE SOLAR DEPRESSION ANGLE FROM 0 DEG TO 32 DEG VS LOCAL HOUR ANGLE FOR LATITUDES O DEG TO 90 DEG.
Descriptive Note : Environmental research papers,
Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
Personal Author(s) : Sandford,Brian P. ; Doan,Lawrence R.
Report Date : 08 DEC 1969
Pagination or Media Count : 114
Abstract : The report presents graphs of local hour angle vs solar depression angles from 0 to 32 degrees for latitudes 0 to 90 degrees. Similar graphs are given in the Air Almanac for solar depression angles to 12 degrees, allowing computations of sunrise to sunset and twilight phenomena up to altitudes of approximately 100 kilometers. The graphs given in this report extend the altitude range of such computations to approximately 1000 kilometers. The tables can also be used for planets and stars, but for the moon considerable error will arise unless corrections for parallax are applied. (Author)
Descriptors : (*SUN, POSITION FINDING), (*TWILIGHT, ASTRONOMY), MATHEMATICAL PREDICTION, SUN, PLANETS, CORRECTIONS, STARS
Subject Categories : Astronomy
Distribution Statement : APPROVED FOR PUBLIC RELEASE