Nikon DTM-502 Series Instruction Manual page 93

• In case the plane is defined by two points (by
selecting [2Pt]), that vertical plane will be the
same with the one used in V-Pln function but
the indicating factors (Sta/dZ vs a/b) are
different. (See p.3-64)
3
･
Once the plane is defined, the calculated 'a', 'b'
values are updated as you move the telescope. No
distance measurement is required.
a = Distance between P1 and the point which is
perpendicular to the target point along the
P1-P2 line
b = Length of the perpendicular line from the
target point to the P1-P2 line
Switching screens by [DSP]
To record the point, press the [ENT] key on any
screen (S-PLN1/3 to S-PLN3/3).
Input PT and CD, then press the [ENT] key.
= Sample records in [PRG]
CO,3ptPlane P1:1062 P2:2902 P3:1547
CO,a=31.497 b=14.239
SS,30123-A49,1.6110,0.0000,234.3210,86.0955,16:07:18,
3-67
PLN1/3 PLN2/3
a:
X:
b: Y:
Z:
→
[7:S-Plane] =
(Temp P3)
b
P2
P1
a
PLN3/3
HA:
VA: