Hemisphere GPS A325, Руководство пользователя

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A325 GNSS Smart Antenna User Guide 22 PN 875-0318-000 Rev D2
Appendix B: Technical Specifications
Table B-1 through Table B-7 provide the GNSS sensor, horizontal accuracy, L-band sensor,
communication, power, environmental, and mechanical specifications for the A325.
Table B-1: GNSS sensor specifications
Item Specification
Receiver type GNSS L1 and L2 RTK with carrier phase
Signals received GPS, GLONASS, and GALILEO
1
Channels 270
GPS sensitivity -142 dBm
SBAS tracking 3-channel, parallel tracking
Update rate 10 Hz standard, 20 Hz optional (with subscription)
Pitch/roll accuracy 1º using tilt sensor
Timing (1PPS) accuracy: 20 ns
Cold start < 60 s typical (no almanac or RTC)
Warm start < 30 s typical (almanac and RTC)
Hot start < 10 s typical (almanac, RTC, and position)
Maximum speed 1,850 kph (999 kts)
Maximum altitude 18,288 m (60,000 ft)
Table B-2: Horizontal accuracy
Item Specification
RMS (67%) 2DRMS (95%)
RTK
2,3
10 mm+1 ppm 20 mm+2 ppm
L-band high precision service
2,4
0.1 m 0.2 m
SBAS (WAAS)
2
0.3 m 0.6 m
Autonomous, no SA
2
1.2 m 2.5 m
Table B-3: L-band DGNSS/HP/XP sensor specifications
Item Specification
Sensitivity -130 dBm
Channel spacing 7.5 kHz
Satellite selection Manual and Automatic
Reacquisition time 15 seconds (typical)
Rejection 15 kHz spacing > 30 dB
300 kHz spacing > 60 dB
Processor
DSP for demodulation and protocol decoding module provides processing for
the differential algorithms
Command support Reports L-band DGNSS/HP/XP region and satellite information
Allows input and status of L-band DGNSS/HP/XP subscription, bit error rate
(BER) output for reception quality indication, and manual frequency tuning