OEM6 Family Installation and Operation User Manual Rev 12
162
Appendix E
OEM638 Technical Specifications
E.1 OEM638 Receiver
PERFORMANCE (SUBJECT TO GPS SYSTEM CHARACTERISTICS)
Position Accuracy
a
a. Typical values. All position and velocity RMS values are based on Horizontal position accuracy. Performance specifications
are subject to GPS system characteristics, U.S. DOD operational degradation, ionospheric and tropospheric conditions,
satellite geometry, baseline length and multipath effects.
Single point
L1 only
1.5 m RMS
L1/L2
1.2 m RMS
NovAtel
CORRECT
SBAS
b
b. GPS-only.
0.6 m RMS
DGPS
0.4 m RMS
PPP
cd
c. Requires a TerraStar subscription which is available direct from NovAtel
www.novatel.com/products/novatel-correct-ppp
.
d. Performance dependent on local observing conditions.
4 cm RMS
RTK
1 cm + 1 ppm RMS
Time to First Fix
Hot: <35 s (Almanac and recent ephemeris saved and approximate position and
time entered)
Cold: <50 s (No almanac or ephemeris and no approximate position or time)
Reacquisition
0.5 s L1 (typical)
1.0 s L2 (typical)
1.0 s L5 (typical)
Data Rates
Measurements
Position
100 Hz
100 Hz
Time Accuracy
ae
e. Time accuracy does not include biases due to RF or antenna delay.
20 ns RMS
Velocity Accuracy
a
0.03 m/s RMS
Measurement Precision
GPS
GLO
Code
Carrier
Code
Carrier
L1 C/A
4 cm
0.5 mm
8 cm
1.0 mm
L2 P(Y)
f
f. L2 P for GLONASS
8 cm
1.0 mm
8 cm
1.0 mm
L2C
g
g. L2 C/A for GLONASS
8 cm
0.5 mm
8 cm
1.0 mm
L5
3 cm
0.5 mm
-
-
Dynamics
Velocity
515 m/s
h
h. In accordance with export licensing.