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OEM6 Family Installation and Operation User Manual Rev 7
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.
Standalone:
L1 only
1.5 m RMS
L1/L2
1.2 m RMS
SBAS
b
b. GPS-only.
0.6 m RMS
DGPS
0.4 m RMS
NovAtel
CORRECT
TERRASTAR-D
c
c. TERRASTAR-D subscriptions are available from NovAtel.
6 cm
Veripos Apex2
d
d. Veripos Apex
2
marine subscriptions are available directly from Veripos (www.veripos.com).
RT-2
1 cm + 1 ppm
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
a
e
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.
638