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10 UPLOADING PHASE MEASUREMENT DATA
A long press on F1 transmits the PIU information back to the reference. Data logging software
can capture the raw data from any connected PIU and its reference for subsequent processing.
This information includes the GPS position of the PIU at the time of the F1 button press, along
with the date/time. Having access to this information, allows the import to third party software,
such as to overlay the identified phase in a Geographical Information System (GIS).