This viewer is a Windows GUI application that supports most of the basic mission planning functionality for all currently operational GNSS space vehicles (GPS, Glonass, WAAS/EGNOS, Giove-A and -B). Specifically, this viewer allows users to view the following information:
This software uses TLE sets, not system specific almanac files, to calculate satellite orbits.
Satellite health flags are downloaded from the Current GNSS Status page of our website on program startup. Such approach ensures that the user always has access to the most current satellite health information. This is a significant advantage over the "standard" approach when the satellite health flags are retrieved from the user selected almanac files and therefore may be out of date (if the almanacs are several days old).
Note that TLE sets are downloaded from http://celestrak.com/NORAD/elements/.