Topcon GR-5 User Manual

Collecting Almanacs and Ephemerides
P/N 7010-1004
2-27
• Bluetooth address – the unique electronic address for the
module.
• Firmware base – the current firmware base version.
• Firmware version – the current firmware version of the
Bluetooth module.
Figure 2-21. Bluetooth Parameters
5. Click OK then Device  Disconnect to quit TRU.
Collecting Almanacs and
Ephemerides
Each satellite broadcasts a navigation message that includes the
ephemeris parameters of the satellite, the almanac, and various other
information. The ephemeris parameters describe the orbital motion of
the satellite and are used to predict its location/trajectory. The
almanac gives the approximate orbit (course) for the transmitting
satellite and all other satellites in the same system.
• GPS and GLONASS satellites broadcast ephemeris data
cyclically, with a period of 30 seconds.
• GPS satellites broadcast almanac data cyclically with a period of
12.5 minutes; GLONASS satellites broadcast almanac data
cyclically with a period of 2.5 minutes.

Topcon GR-5 Specifications

General

Brand	Topcon
Model	GR-5
Category	Receiver
Language	English