Emlid Reach RS2+ with Tilt - Accuracy Test

You can collect building corners and other hard to reach points more easily than ever by using X-PAD's X-TILT function with any Emlid receiver, including the Reach RS2+ and Reach RX.  

X-TILT uses the sensors on your Android device for tilt compensation on your GNSS receiver.  Simply collect two shots of the same point at two different angles, and X-TILT does the rest.  Check out the video below to see how it works.

 

The tilted pole shots must be accurate in order to be useful for building corners and other hard to reach shots.  To test the accuracy of the X-TILT function, we compared level shots and tilted shots with points collected with a robotic total station.

Using two control points, we ran a resection with the GeoMax Zoom95 Robotic Total Station.  Then, we collected ten points with the Zoom95 in order to compare the GNSS shots taken.  

Next the Reach RS2+ was used by leveling the rod and storing points at each of the ten locations.  Finally the RS2+ was used again, this time tilting the rod and using the X-TILT function to compensate for the tilt.  

The root mean squared error in feet for the RS2+ without tilt in the Northing, Easting and Elevation, was 0.04', 0.10', and 0.03' respectively.

The root mean squared error in feet for the RS2+ using X-TILIT in the Northing, Easting and Elevation, was 0.02', 0.08', and 0.03' respectively.

The results of this test show that the RS2+ maintains high accuracy using the tilt compensation of the X-TILT function.  

The shot-by-shot results are shown below. 

Control
1000 572468.309 2205741.687 1192.149
1001 572586.441 2205756.001 1195.344
GNSS No Tilt
100 572486.405 2205757.285 1192.964
101 572501.161 2205757.031 1193.774
102 572508.558 2205756.911 1194.181
103 572515.879 2205756.79 1194.592
104 572525.85 2205756.691 1194.685
105 572534.973 2205756.603 1194.758
106 572544.115 2205756.541 1194.895
107 572561.178 2205756.34 1195.084
108 572569.602 2205756.237 1195.16
109 572578.139 2205756.132 1195.274
Tilt
OFS_0001 572486.411 2205757.323 1192.984
OFS_0002 572501.21 2205757.048 1193.789
OFS_0003 572508.59 2205756.917 1194.195
OFS_0004 572515.935 2205756.828 1194.563
OFS_0005 572525.901 2205756.714 1194.69
OFS_0006 572535.015 2205756.627 1194.748
OFS_0007 572544.121 2205756.554 1194.903
OFS_0008 572561.183 2205756.365 1195.1
OFS_0009 572569.631 2205756.292 1195.15
OFS_0010 572578.154 2205756.178 1195.26
Robot
200 572486.412 2205757.416 1192.958
201 572501.184 2205757.152 1193.764
202 572508.606 2205757.015 1194.18
203 572515.931 2205756.89 1194.544
204 572525.898 2205756.792 1194.691
205 572535.018 2205756.706 1194.742
206 572544.158 2205756.632 1194.854
207 572561.2 2205756.414 1195.045
208 572569.649 2205756.331 1195.118
209 572578.21 2205756.218 1195.238