The unit also allows users to directly input Keplerian parameters to make new or change an existing almanac.
Users can save constellations for future use.
Other features include animated ground tracks and orbital deployment, an unlimited number of RS, a map of Japan and the world for site coordinate input, and graphs of dilution of precision, satellite number, availability, and visibility. DX Antenna Company, Ltd., Tokyo, Japan. Position accuracy is said to be 25 meters, with a satellite reacquisition time of 100 milliseconds. Septentrio, Leuven, Belgium. These devices can be tuned to the L1 GPS frequency with user-specified offset for radon effect.