Nexcom VTC 7260 - Technical Specifications

Copyright © 2022 NEXCOM International Co., Ltd. All Rights Reserved.
64
Appendix D: GPS with Dead Reckoning Feature
VTC 7260 Series User Manual
Technical Specifications
Parameter Specification
Receiver type 72-channel u-blox M8 engine
GPS L1C/A, SBAS L1C/A, QZSS L1C/A
GLONASS L1OF, BeiDou B1, Galileo E1B/C
2
GNSS
GPS &
GLONASS
GPS &
BeiDou
GPS
Time-To-First-Fix
3
Cold start 27 s 28 s 30 s
Hot start 1.5 s 1.5 s 1.5 s
Aided starts
4
4 s 6 s
5
3 s
Sensitivity
6
Tracking &
Navigation
7
-160 dBm -160 dBm -160 dBm
Reacquisition -159 dBm -159 dBm -159 dBm
Cold start -147 dBm -147 dBm -147 dBm
Hot start -156 dBm -156 dBm -156 dBm
Navigation
GPS &
GLONASS
GPS &
BeiDou
GPS
Horizontal Position
accuracy
8
Autonomous 2.5 m 2.5 m 2.5 m
SBAS 2.0 m 2.0 m 2.0 m
Velocity accuracy
9
0.05 m/s 0.05 m/s 0.05 m/s
Heading accuracy
9
0.3 degree 0.3 degree 0.3 degree
ADR position error
10
Gyro + speed pulse +
accelerometer
typ. 3 % of distance
travelled without GNSS
Frequency of time
pulse signal
0.25 Hz ... 10 MHz
Maximum navigation
rate
(High Rate output)
11
20 Hz
Navigation
GPS &
GLONASS
GPS &
BeiDou
GPS
Maximum navigation
rate
(Measurement rate)
2 Hz
Navigation latency
12
300 ms nominal
Maximum sensor
measurement
message output rate
10 Hz
Sensor measurement
message output
bandwidth
13
nominal 50% of output
rate
Accuracy of time
pulse signal RMS 99%
30 ns
60 ns
30 ns
60 ns
30 ns
60 ns
Operational limits Dynamics
Altitude
Velocity
≤ 4G
50,000m
500 m/s
2
Ready to support Galileo E1B/C when available with a flash firmware update
3
All signals at - 130 dBm
4
Dependent on aiding data connection speed and latency
5
BeiDou assisted acquisition is not available
6
Demonstrated with a good external LNA
7
Optimized for best navigation performance with dead-reckoning
8
GNSS fix available, CEP, 50%, 24 hours static, -130dBm, > 6 SVs
9
GNSS fix available, 50% @ 30 m/s
10
Typical road and vehicle conditions
11
For update rates > 2 Hz, extrapolation techniques are applied.
12
Dependent on signal conditions but measurements are delivered with time-stamp corresponding
to measurement time
13
Higher bandwidths are used for navigation
14
Assuming Airborne < 4 g platform