APPENDIX A SMART7 Technical Specifications
SMART7 Installation and Operation User Manual v6
135
Maximum Data Rate
Measurements
Position
up to 20 Hz
up to 20 Hz
Time to First Fix
Hot: <20 s typical (Almanac and recent ephemeris saved and approximate position
and time entered)
Cold: <40 s typical (No almanac or ephemeris and no approximate position or time)
Signal Reacquisition
L1
0.5 s typical
L2
<1.0 s typical
Time Accuracy
1
20 ns RMS
Velocity Accuracy
2
<0.03 m/s RMS
The IMU performance specifications apply to the SMART7-S and SMART7-SI only.
Gyroscope Performance
Input Rate (max)
±150 °/second
Bias Repeatability
0.5 °/second
Bias Instability
3.5 °/hour
Angular Random Walk
0.1 °/√hour
Accelerometer Performance
Accelerometer Range
±5 g
Bias Repeatability
15 mg
Bias Instability
0.1 mg
Velocity Random Walk
0.05 m/s/√hour
Attitude Accuracy
RMS
95%
Roll
0.03
0.06
Pitch
0.03
0.06
Heading
0.1
0.5
Table 23: SMART7-S IMU Performance
1
Time accuracy does not include biases due to RF or antenna delay.
2
Export licensing restricts operation to a maximum of 515 meters per second.
