ashtech GG Surveyor, Reference Manual

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2 GG24 Surveyor GPS+GLONASS Reference Manual
relative to the World Geodetic System WGS-84 reference ellipsoid when the receiver
is used in GPS or MIX mode, and in PZ-90 when in GLN only mode.
Upon application of power, the GG Surveyor runs a self-test of internal memories,
and thereafter periodically self-tests various functions during normal operation. Test
results are stored for commanded output. After self-test, the GG Surveyor initializes
the battery-backed RAM. If the battery-backed-up RAM fails self-test (due, for
example, to a low battery condition), the GG Surveyor clears and reports the loss of
stored data, then initializes the 24 channels and begins searching for all satellites
within the field of view of the antenna.
Technical Specifications
Table 1.1 lists the technical specifications of the GG Surveyor.
Table 1.1: Technical Specifications
Characteristic GG Surveyor Specifications
Tracking • 12 channels L1 GPS code and carrier
• 12 channels L1 GLONASS code and carrier
Size 7.2 cm wide × 5.8 cm height × 22.5 cm depth
Weight 3.4 lbs
Operating temperature -30° to +55°C
Storage temperature -40° to +85°C
Environment
•
Humidity
• Vibration
• Shock
• Resistant to wind-driven rain and dust to MIL-STD-810E
• N/A
• N/A
Power consumption 3 watts
Input Voltage 6 to 15 VDC
Speed (Maximum) 1,000 knots (higher velocities available under validated export
license)
Altitude (Maximum) 60,000 ft (higher altitude available under validated export license)
Interface • Three bi-directional RS-232 ports via DB 25 connector up to
115,200 bps
• One antenna port
• Event marker and 1PPS via DB25 connector
• optional external reference connector
• optional radio antenna connector