Geography Reference
In-Depth Information
a
a
,
1
2
1
T
,
T
T
,
T
T
b
,
L
,
2
2
2
b
2
L
,
1
1
1
Figure 21.
In plane projection of the target sighting field
min.
min.
1
T
1,2
a
2
R
cos
;
a
2
R
cos
;
1
T
2
T
360
60
360
60
min.
min.
1,2
2,
T
b
2;
R
b
2.
R
(23)
1
2
360
60
360
60
On this basis, it is, also, possible to calculate the direct distances between the target
T
and
the positions,
L
and
L
, of the two video cameras by means of the relations:
2
2
2
2
LT
a
b
b
and
LT
a
a
b
(24)
1
1
1
2
2
1
2
2
Moreover, in conformity with the schema presented in figure 22, the height
h
of the target
T in the horizontal plane O.P. of the reference ellipsoid can also be calculated with one of the
relations:
hh LT
sin
or :
hh LT
sin
(25)
TL
1
T
TL
2
T
1
1
2
2
