Computation of Times of Sunrise, Sunset, and Twilight in Or Near Mountainous Terrain
Title | Computation of Times of Sunrise, Sunset, and Twilight in Or Near Mountainous Terrain PDF eBook |
Author | Bill C. Ryan |
Publisher | |
Pages | 6 |
Release | 1977 |
Genre | Sun |
ISBN |
An electronic calculator with trigonometric functions can be used to compute times of sunrise, sunset, or twilight, or time of desired illumination at any location in mountainous terrain. The method is more convenient and versatile, and less cumbersome than using tables. Latitude, longitude, elevation, day of the year (1 to 366), and slope to the horizon at the azimuth of the sun at sunrise and sunset are necessary for the computations. The effects of elevation of the observation point and blocking of the sun's radiation by terrain surrounding tlie observation point are included in the computations.
Computation of Times of Sunrise, Sunset, and Twilight in Or Near Mountainous Terrain
Title | Computation of Times of Sunrise, Sunset, and Twilight in Or Near Mountainous Terrain PDF eBook |
Author | Bill C. Ryan |
Publisher | |
Pages | |
Release | 1977 |
Genre | |
ISBN |
U.S.D.A. Forest Service Research Note PSW
Title | U.S.D.A. Forest Service Research Note PSW PDF eBook |
Author | Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.) |
Publisher | |
Pages | 152 |
Release | 1975 |
Genre | Forests and forestry |
ISBN |
U.S.D.A. Forest Service Research Note PSW.
Title | U.S.D.A. Forest Service Research Note PSW. PDF eBook |
Author | |
Publisher | |
Pages | 92 |
Release | 1976 |
Genre | Forests and forestry |
ISBN |
Publications
Title | Publications PDF eBook |
Author | |
Publisher | |
Pages | 20 |
Release | 1978 |
Genre | Forests and forestry |
ISBN |
Monthly Catalog of United States Government Publications
Title | Monthly Catalog of United States Government Publications PDF eBook |
Author | |
Publisher | |
Pages | 1066 |
Release | 1979 |
Genre | Government publications |
ISBN |
Monthly Catalogue, United States Public Documents
Title | Monthly Catalogue, United States Public Documents PDF eBook |
Author | |
Publisher | |
Pages | 1136 |
Release | 1979 |
Genre | Government publications |
ISBN |