21
Corrected Horizontal Distance:
D=S×[cos
α
+si
nα
×S×cos
α
(K-2) / 2Re]
Corrected Elevation:
H=S×[sin
α
+cos
α
×S×cos
α
(1-K) / 2Re]
If the Atmospheric refraction and the earth curvature are not corrected,
the formula for calculating horizontal distance and elevation are as followed:
D=S×cos
α
H=S×sin
α
In the formula:
K=0.14: Atmospheric refraction coefficient (can be selected
according to actual position)
Re=6370 km: Radius of the earth curvature.
α
: The vertical angle (counted from the horizon)
S: Slope distance
Alternative values for K are 0, 0.14, 0.2.
3.8.
Set up the minimum reading of the angle
See 9: Operating Menu.
The operation on the instrument follows: “MENU
→
5,
Options
→
6, Mini readout (Angle).”
3.9.
Setup of Automatic Shutdown
See reference in 9. Operating Menu.
The setup of automatic shutdown on the instrument follows
“MENU
→
5, Options
→
9, Auto shut down. Options displayed are as follows
You may choose ‘Never’ to cancel the auto shutdown. When choosing 5,
10, 20 minute options, the instrument will shut down automatically if there is no
key pressed. Use the ‘
▲
’or ‘
▼
’keys to move indicator ‘>’ up and down to the
option desired. Press the soft key ‘Enter’ or ‘ENT’ to save the setting. Pressing
ESC will result in no changes of settings.
3.10.
Set up the Addictive Constant and the Multiplying Constant
See reference in 9. Operating Menu.
The setup of addictive and multiplying constants on the instrument follows
“MENU
→
6, Calibrate & config
→
3, Add const.” The constants are already set
Summary of Contents for Total Station ATS-120 Series
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