we are currently testing the accuracy of the Emlid products we use for our UAV surveys and reference data collection.
In one of the tests we mounted a RS2+ unit on a 2.1 meter carbon survey pole wit attached bipod to keep it stable during point measurements. The total distance from the antenna is reported as 2.234m (Adjusting for the Antenna of the RS2+)
The carbon pole has a bubble level with an accuracy of 40’. If we do the math: sin((40/60)°) * 2.234m = 26mm. So we could have an lateral error of 26mm in our measurement which is not neglibile.
Now we could order a more precise bubble level or get a smaller pole to reduce this error. However i was wondering whether we actually need to be that precise or if the Emlid reach units already account for this.
We set the pole length in Emlid Reach and the units have an IMU which can measure the level.
Do the Emlied Reach units correct for off-level placement ? And if yes do we need be accurate with leveling at all? If we can just eyeball the pole to be approximately level this can speed up point acquisition a lot.
2.6cm isn’t good? Who makes a 2.1m pole? Just so I can make sure I never accidentally buy one. We use 40’ vials all the time and hit within our 0.10ft tolerance easily every time. If you need more accuracy you need a robot.
Or Javad makes a collapsible Monopod for their units that includes a dual 8min/40min bubble vial. Only thing is that it uses a 1/4-20 thread, so you would need an adapter to fit the RS2 5/8 thread. They also sell the double vial by itself.