Javad ALPHA Operator's Manual page 98

Specifications
Receiver Specifications
General Details
Elevation
Solution mode
Process interval
Latency
Raw Data logging
Status
Results
Ambiguity fixing level
Base or Rover
Autonomous
Static, Fast Static
Kinematic, RTK
RTK (OTF)
DGPS
Cold Start
Warm Start
Reacquisition
98
0 to 90 degrees (independent of data logging)
Delay (synchronization)
Extrapolation (not synchronized)
1, 5, 10, 20, 50, 100 Hz optional
Delay mode – 20 msec to 20 sec (depends on latency which receives corrections
data from base receiver)
Extrapolation – 20 to 30 msec
The receiver can record raw data at another interval during RTK operation
Fix, Float, DOP, Data Link Status, Modem Latency, Common Satellites,
Percentage of fixing
RTK coordinates, HRMS, VRMS, Covariance Matrix
Selectable thresholds
Low: 95%;
Medium: 99.5%;
High: 99.9%
Measuring Modes
Static, Fast Static
Kinematic (Stop and Go)
RTK (Real-time Kinematic)
DGPS (Differential GPS)
SBAS DGPS
Measuring Accuracy
< 2 m
Horizontal: 0.3 cm + 0.5 ppm * base_line_length
Vertical: 0.5 cm + 0.5 ppm * base_line_length
Horizontal: 1 cm + 1 ppm * base_line_length
Vertical: 1.5 cm + 1.5 ppm * base_line_length
Horizontal: 1 cm + 1 ppm * base_line_length
Vertical: 1.5 cm + 1.5 ppm * base_line_length
< 0.25 m Post Processing,
< 0.5 m Real Time
< 35 sec
< 5 sec
< 1 sec
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