GeoMax Zoom80 R, User Manual

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Technical Data
Formulas
 D
1
Atmospheric correction [ppm]
p Air pressure [mbar]
t Air temperature [°C]
h Relative humidity [%]

x (7.5 * t/(237.3 + t)) + 0.7857
If the basic value of 60 % relative humidity as used by the EDM is retained, the maximum possible error
in the calculated atmospheric correction is 2 ppm, 2 mm/km.
Reduction to mean sea
level
 D
2
The values for  D
2
are always negative and are derived from the following formula:
Projection distortion
 D
3
The magnitude of the projection distortion is in accordance with the projection system used in a particular
country, for which official tables are generally available. The following formula is valid for cylindrical
projections such as that of Gauss-Krüger:
In countries where the scale factor is not unity, this formula cannot be directly applied.
Atmospheric correc-
tions °C Atmospheric corrections in ppm with temperature [°C], air pressure [mb] and height [m] at 60 % relative
humidity.
Formula for visible red laser
TS_105
Δ
D
1
= 286.34 -
0.29525 · p
· 10
x
4.126 · 10
-4
· h
-
1
273.15
 D
2
Reduction to mean sea level [ppm]
H Height of EDM above sea level [m]
R 6.378 * 10
6
m
TS_106
Δ
D
2
= -
H
R
· 10
6
 D
3
Projection distortion [ppm]
X Easting, distance from projection zero line with the scale factor
1 [km]
R 6.378 * 10
6
m
TS_107
Δ
D
3
=
X
2
2R
2
· 10
6
TS_108
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
11
0
11
5 120
125
130
135
140
50°C 50°C
40°C 40°C
30°C 30°C
20°C 20°C
10°C 10°C
0°C 0°C
-10°C -10°C
-20°C -20°C
550 mb
5000 m 4500
600 650 700 750 800 850 900 950 1000 1050 mb
550 mb 600 650 700 750 800 850 900 950 1000 1050 mb
4000 3500 3000 2500 2000 1500 1000 500 0 m