Spectra Precision Survey Pro CE v3.6 User Manual - Manual (Page 332)

Cogo Menu
R-175
HD/VD to SD/ZA
&RJR +'9' WR 6'=$ 
The HD/VD to SD/ZA screen will convert a vertical and horizontal
distance to an equivalent slope distance and zenith angle.
Horz Dist : is the horizontal distance from the
occupy point to the foresight point.
Vert Dist : is the vertical distance from the
occupy point to the foresight point.
HI : is the distance that the total station is above
the ground.
HR : is the length of the rod.
;
Earth Curvature Adjust : When checked, the
resulting zenith angle and slope distance will
account for the curvature of the earth and
refraction.
6ROYH : computes the equivalent slope distance and zenith angle from
the data entered.
Results
Zenith : is the computed zenith angle from the occupy point to the
foresight point.
Slope Dist : is the computed slope distance from the occupy point to
the foresight point.