Ephemeris is a program that lets you enter a date and a location and then computes the time and azimuth (compass bearing) or sunrise, sunset, moonrise and moonset. In addition, it displays a schematic representation of the phase of the moon and its % illumination. It can also generate a table listing the positions of the sun and moon in the sky and the length of shadows cast by the sun at 15 minute intervals for a given day. In Calendar mode, it can display the phases of the moon for any given month. Finally there is Compass mode — just point your pocket PC at the sun or moon and it tells you which way is north. For more information, see the readme.txt and help files.

To install Ephemeris, first establish a connection between your desktop PC and your Pocket PC, then run Ephem.exe on your desktop PC and follow the on-screen instructions.