Geography Reference
In-Depth Information
b
aa
2,
T
2
tan
.
(17)
T
cos
2
1
2
1,2
1,
T
2
2,
T
From the first expression, we obtain:
1,2
2,
T
;
(18)
1,
T
tan
cos
T
2
2,
T
1
and from the second expression it results that:
cos
tan
2,
T
1,2
2
2,
T
T
2
;
(19)
1,
T
cos
tan
2
2 ,
T
T
2
So by elimianatig the
parameter, we obtain:
1,
T
cos
tan
2,
T
1,2
2
2,
T
T
1,2
2,
T
2
and :
tan
tan
T
T
1
2
tan
tan
cos
tan
tan
;
1,2
2,
T
T
2,
T
T
1,2
2
2,
T
T
T
2
1
1
2
On this basis, the following implicit computing relation of the latitude angular difference
is obtained:
2,
T
tan
T
cos
tan
2
(20)
2,
T
1,2
1,2
2
2,
T
T
tan
tan
1
T
T
1
2
and in continuation:
(21)
T
2
2,
T
With the determinated in this mode value of the angular difference
, can be calculated
2,
T
in this phase and the value
of the longitude angular difference by means of one of the
two explicit relations (7.1) or (7.2).
1,
T
In similar mode:
(22)
T
1
1,
T
After obtaining, in the presented mode, of the target geographic coordinates, and , in
continuation it is possible to calculate and the linear distances:
a
1
,
a
2
and
b
1
,
b
2
, on the
longitude and respectively latitude directions, between the video camera successive
positions and, respectively, between these positions and the sighted target, with the
relations:
