Real Time Kinematic Measuring - Javad ALPHA Operator's Manual

Setup and Measuring

Real Time Kinematic Measuring

Collect Data
is changed to static mode to collect data. So, while moving, the Rover is in kinematic mode, and
while collecting data, the Rover is in static mode.
1. Set up the Rover at an unknown point and press power. Allow the Rover to collect static
data for two to ten minutes. The REC LED will be yellow.
2. Check the STAT light for satellites tracked.
3. When finished, press the FN button for less than 1 second to assign the Rover to
kinematic.
4. Move the Rover to the next location (measuring point), and press the FN button for less
than a second to collect the data in static mode for two to ten minutes.
5. Repeat steps five and six until all points have been measured. The occupation time for the
points depends on the same factors as for the static measuring method.
6. When finished, press the FN button for one to five seconds to stop logging data. Turn off
the Rover if needed. This method of GNSS measuring allows the operator to reduce the
point occupation time, thus permitting field crews to measuring many more points
compared to the other methods available.
Note:
Remember, if the REC LED blinks green, the current mode is dynamic, if it blinks yellow, the
current mode is static.
4.5. Real Time Kinematic Measuring
With RTK measuring, as with kinematic measuring described above, one receiver serves as the
reference station and conducts observations with its antenna affixed to a stationary tripod or some
other device. The other receiver functions as a rover and conducts observations (using an antenna)
affixed to a mobile pole and moved to observation points.
Unlike post-processed kinematic measurings, RTK measurings utilize a communications link
between the Base and Rover. Using a radio modem link, the Base receiver transmits its
measurement and location data to the Rover receiver. The Rover, based on the transmitted data
and its own observation data, immediately conducts a baseline analysis and outputs the results.
For specific settings used in RTK measurings, see "Configuring the Internal GSM Module" on
page 42 and "Configuring the Receiver" on page 51.
Usually, the receiver will start to output the coordinates of the antenna's phase center along with
the solution type within 10–30 seconds. However, GSM phones may take as long as 60 seconds to
synchronize.
The geodetic coordinates displayed on the Location tab are always computed in WGS84 and have
four solution types.
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