ashtech DG14, Reference Manual

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2 DG14 and DG16 Board & Sensor Reference Manual
The DG16 is designed for stand-alone and differential GPS (DGPS) operation; it
can operate as a base (reference) station or a remote (rover) station, providing or
using real-time differential GPS corrections in RTCM SC-104 format
(Version 2.2).
This chapter describes DG16 hardware and functionality, describes the RF
interface connector and the power/input/output connector, options, firmware
upgrades, and lists power requirements and environmental specifications.
Table 1.1. DG16 Performance Specifications
Position Accuracy (DGPS)
Horizontal CEP 40 cm
Horizontal (95%) 90 cm
Vertical (95%) 1.6 m
Time to First Fix (TTFF)
Re-acquisition 3 seconds
Hot Start 11 seconds
Warm Start 35 seconds
Cold Start 90 seconds
Physical Specifications
Size Board: 2.300” x 4.250” (± 0.005); 107.95 mm x 57 mm (± 0.13)
Sensor: 178 mm x 105 mm x 52 mm
Weight Board: 2.8 oz
Sensor: 1 lb, 4 oz
Humidity 95% Non-condensing
Shock RTCA DO-160C - op/crash safety:
• Operational —
±
40 G’s in the X, Y, or Z axis
• Non-operational —
±
75 G’s in the X, Y, or Z axis
Vibration • MILSPEC 810E
• Category 10: Minimum Integrity Test - General
• Sine Sweep:
• 8.9 G’s
• 5 to 200 Hz
• 52 Hours/Axis
Acceleration 20 G
Maximum Speed 1,000 knots
Maximum Altitude 60,000 ft