Ex Mensura, Scientia
High-precision range calculator. Companion to Wndsn Telemeters: Low tech, high utility graphical distance & altitude computers from the Wndsn applied science lab.
By way of using a Wndsn Quadrant or Telemeter measuring degrees or a hairline graticule measuring mil or moa or any other instrument or technique that returns the angular size of a known object, we can determine the distance to that object.
s = 5.8
α = 1 degrees
or 17.453 MIL
(MRAD) or 17.7778 MIL
(NATO-MIL) or 60 MOA
1/tan(1°)
: d = s · 57.29
d = 332.2818
The display precision set is .4
. To change that, edit the variable &digits=x
in the URL where 0 <= x <= 9
.
[Load sample values (JSON) (XML) (CSV).]
Compare MIL vs. MRAD vs. NATO-MIL.
d = s · 1/tan(α)
d = 5.8 · 1/tan(1°)
tan(1°) = opposite/adjacent
5.8/d = tan(1°)
d/5.8 = 1/tan(1°)
d = 332.2818
1 rad = 57.3 deg 6.2832 rad = 360 deg = 6283.2 mil = 21,600 minutes (moa) 0.017453 rad = 1 deg = 17.453 mil = 60 minutes (moa) 0.0573 deg = 1 mil = 3.438 minutes (moa) 0.05625 deg = 1 natomil