EXTENSION OF PROGRAMS FOR CALCULATIONS OF GREAT CIRCLE PATHS AND SUNRISE-SUNSET TIMES

• Main Author: Crary, H. H.
• Other Authors: NATIONAL BUREAU OF STANDARDS BOULDER CO CENTRAL RADIO PROPAGATION LAB
• Format: Text
• Language: English
• Published: 1965
• Subjects: *ASTRONOMY; *SOLAR RADIATION; *CELESTIAL MECHANICS; COMPUTER PROGRAMMING; TIME; SUN; TWILIGHT; IONOSPHERIC PROPAGATION; SKY BRIGHTNESS; VERY LOW FREQUENCY; DIURNAL VARIATIONS; MATHEMATICAL PREDICTION; LIGHT TRANSMISSION; SUNRISE; SUNSET; Byrd; Byrd Station; Antarc*; Antarctica
• Online Access: http://www.dtic.mil/docs/citations/AD0611400; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0611400

A previous note by Brady and Crombie (NBS TN 209) describes methods and a program for calculating and plotting sunrise and sunset times at specified heights and distances along a great circle path determined by the locations of the end points. The program also plots the distribution of darkness or daylight along the path versus time. This program has been modified to remove some restrictions on the use of the earlier program, and to provide the option of calculating the short or long great circle path. In addition, transmitter, receiver, and solar bearings are also calculated and plotted. Some interesting characteristics of the short and long paths from Rugby, England, to Byrd Station, Antarctica, are shown. (Author) Available from Superintendent of Documents, GPO, Washington, D. C., 20402, $0.25, as C13.46:303. Available copy will not permit fully legible reproduction. Reproduction will be made if requested by users of DDC.