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2.7.6. Precise Point Positioning
With the Precise Point Positioning technique, you may accurately determine base
coordinates anywhere in the world without real-time correction or base station nearby
however it may take a considerable time to get coordinates.
General steps:
1. Enable logging of raw data and record log for a few hours.
2. Export log with the collected data from Emlid Flow to your mobile device or PC.
3. Upload the collected file to PPP service (for example, NRCan).
After you get the coordinates you may enter them manually in Base coordinates section.
2.7.7. Placing the base station in the field
Caution: The mismeasured height of the antenna above the mark is probably the most
pervasive and frequent blunder in GPS control surveying.
2.7.8. Placing Reach RS2/RS2+
When placing your Reach RS2/RS2+ in the field, make sure your Reach device is placed
precisely above the marked point on the tripod and leveled. If you are setting up base
coordinates manually, you need to measure the antenna height offset. Follow the steps
below:
1. Measure the distance between the mark and the bottom of your Reach (h on Figure
6).
2. Specify the measured distance in Emlid Flow. It will automatically calculate the
antenna height.
Reach RS2/RS2+ antenna height: For Reach RS2/RS2+, the antenna height is the
distance between the mark and the bottom of the receiver (h on Figure 6) plus the receiver's
height to the antenna reference point (ARP) which is equal to 134 mm and automatically
added by Emlid Flow.
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