NorthStar 958, Руководство по установке

Страница: 49 / 50

APPENDIX A: 958 system technical specifications
958 Installation Manual, Rev. A1 Page 45
TABLE 17: 2701 technical specifications
Physical features Interfacing
Dimensions: 2.0” high x 4.68” wide x 8.9” deep
Weight: 2 pounds Primary power: 10 to 40 VDC (12V and 24V
systems). 10 watts typical.
RS-232, GPS, and beacon receiver comm ports
Performance Environmental
Velocity: 1852 km/h (514 m/sec) max.
Acceleration: 4 Gs (39.2 m/sec
2
, Jerk: 2 m/sec
3
Position accuracy: < 1 m circular error probability
(CEP), DGPS; < 2 m circular error probability (CEP),
WAAS.
Time-to-first-fix (TTFF): Hot start - 20 seconds typical,
with current almanac, position, time, and ephemeris.
Warm start - 45 seconds typical, with current
almanac, position, time, and ephemeris. Cold start - 2
minutes typical, no almanac, position, and time. With
WAAS acquisition, add 30 seconds typical (max. 1
minute)
Re-acquisition time: < 1 second typical to re-acquire
(5-second obscuration); 3 seconds typical to
re-acquire (60-minute obscuration).
Channels allocation: 10 GPS channels plus two
WAAS satellites.
Operating temperature:
Receiver: 0 degrees C to +50 degrees C.
Antenna/preamp: -40 degrees C to +50 degrees C.