Javad DELTA Operator's Manual page 42

Specifications
Receiver Specifications
General Details
DGPS
Real time heading accuracy (for
DELTAD and DELTAQ only)
Roll/Pitch (for DELTAQ only)
Cold Start
Warm Start
Reacquisition
1. RTK update rate means the position update rate of the rover working in the "extrapolation" mode. In the
extrapolation mode you may use the base with measurements update rate = 1 Hz and run the rover at
100 Hz RTK update rate.
2. In-Band interference usually is caused by harmonics of external transmitters (like TV stations) located
close to GPS receiver. Interference decreases SNR and may stop receiver operation completely. Our In-
Band Interference Rejection technique suppresses interference and recovers SNR. Multipath signal
propagation worsens code/phase measurements. Advanced Multipath Reduction technique reduces this
harmful effect.
3. The accuracy estimate is applicable to base lines up to several hundreds of km. But normally RTK
works predictable on base lines up to 50 km.
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< 0.25 m Post Processing,
< 0.5 m Real Time
~ 0.004/L [rad] RMS, where L is the antenna separation in [m]
~ 0.008/L [rad] RMS, where L is the antenna separation in [m]
< 35 sec
< 5 sec
< 1 sec
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