By William Jeffrey Rankin, Thu June 16 2022
Stephen L. Moshier's venerable aa program (an astronomical almanac used to calculate planet and star positions), compiled for Cygwin (gcc version 11.3.0). It can be used interactively, or input can be directed from a text file.
aa - Astronomical Almanac, version 5.6 (aa-5.6.tar.gz, 161K)
Used interactively, simply ./aa. Or with input directed from a file, ./aa < Mars-2022-06.txt. Sample input file Mars-2022-06.txt to display data for Mars in June, 2022. The second set of numbers, ending with -1, tells aa to quit.
Longitude, latitude, altitude, and other local parameters are specified in the aa.ini file. Note: this file must reside in the same directory as the aa executable.
-84.17 ;Terrestrial east longitude of observer, degrees 39.95 ;Geodetic latitude, degrees 252.0 ;Height above sea level, meters 10.0 ;Atmospheric temperature, deg C 1000.0 ;Atmospheric pressure, millibars 1 ; 0 - TDT=UT, 1 - input=TDT, 2 - input=UT 0.0 ;Use this deltaT (sec) if nonzero, else compute it.
Refer to the read.me file included with the distribution.