Emlid Reach RS3 Tilt Accuracy Test

You can collect building corners and other hard to reach points more easily than ever by using the Emlid Reach RS3's built-in tilt compensation.  

The IMU in each RS3 is factory calibrated, so you don't have to calibrate in the field.  The IMU accuracy spec is 2 mm + 0.3 mm/°.

To test the accuracy of the RS3s tilt compensation, we compared plumb shots with tilt shots, and compared those two shots.  

At each location the Reach RS3 tilt compensation was disabled and a shot was taken with a plumb rod.  Next the tilt was enabled on the same location and a shot was taken with a plumb rod.  Lastly the rod was tilted and a shot was recorded.  

The root mean squared error in feet for the RS3 with a plumb rod with tilt turned on in the Northing, Easting and Elevation, was 0.07', 0.05', and 0.02' respectively.

The root mean squared error in feet for the RS3 with a tilted rod with tilt turned on in the Northing, Easting and Elevation, was 0.05', 0.06', and 0.04' respectively.

The results of this test show that the RS3 maintains high accuracy using the tilt compensation.

The shot-by-shot results are shown below.