Stonex R25/R25LR Total Station - User Manual 120
Appendix II: Correction for refraction and earth curvature
The factory setting for the refraction coefficient K is 0.142.
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:
NOTE:
• Refer to the 5.3. EDM setting to change the value.
• These designs, figures and specifications are subject to change without notice. We shall not be held
liable for damages resulting from errors in this instruction manual.
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