STONEX R2 PLUS - Appendix IV Connect the R2 PLUS series and PDA with Bluetooth

Stonex R2 PLUS Total Station - User Manual 132
Appendix II： Correction for refraction and earth
curvature
Considering the correction of refraction and earth curvature for distance measurement,
the formula for slope distance, horizontal distance and vertical distance applied in the
instrument are as followings:
The conversion formula for horizontal and vertical distance is as follows when correction
for refraction and earth curvature is not applied:
HD=SD COS§ VD=SD ∣SIN§∣
NOTE:
The factory setting for the refraction coefficient K is 0.142.
Refer to the “§3.8.1 Measure Condition Setting” to change the value.