35
A-1-2 PPK with PPP-Derived Base
Figure A-3
At places where there is no cellular phone network, PPK post-processing can be performed to derive
accurate position of the collected rover data logs.
A pair of S100 RTK receivers are needed to perform this operation as shown in Figure A-3.
The procedure steps to do this:
1. The base logs data for longer time period for online PPP processing to derive accurate base
position.
2. The rover logs data for a minute or two for each survey point.
3. Back in office, convert base log file to RINEX format, and upload to online PPP service to obtain
accurate position coordinate P
1
of the mobile RTK base.
4. Use RTKLIB’s RTKPOST to post-process each rover log file against base log file, using P
1
as base
position, to derive accurate rover position. Do this for all survey point collected rover log files.
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