Track satellites with this tool. PreviSat is a satellite tracking program for observing purposes. Very easy-to-use, it shows the positions of the satellites in real-time or manual mode. PreviSat is able to make predictions of their passes and also predictions of Iridium flares.

PreviSat Features:
1. NORAD SGP4 model (Vallado, 2006)
2. Real time / manual mode
3. Topocentric / Equatorial / Terrestrial coordinates (satellites, Sun, Moon)
4. Osculating elements, satellite informations
5. Intuitive interface (handling of TLE, selection of location, options for display)
6. Prediction of passes, Iridium flares, orbital events, ISS transits (very fast calculations)

The license of this software is Free, you can free download and free use this calculator software.