, , , , . R a. :
( ) - ;
- ;
- ;
- .
a , R . , , , ( ):
= R×tg(a/2); = R×a = p R a180; = R [sec(a/2) - 1], (15.1)
a - .
, , , .
. :
= - ; = + ; = + /2. (15.3)
:
= + - ; = + /2. (15.4)
6 . .
7.16 |
d = D cos 2 υ.
OMN 7.16 , i + MN = h + V,
MN = h ' = d tg υ, h = i + h ' V = d tg υ + i V
(7.11) tg υ = sin υ / cos υ, h = D cos 2 υ sin υ / cos υ + i V,
, , h = 0,5 D sin 2υ + i V (7.13)
300 , f = 0,42 d 2 / R,
R .
: h = d tg υ + i V + f.
i V 1 , d tg υ . , υ.
. : m = (∂ h / ∂ d ) 2 m + (∂ h / ∂υ) 2 m + m + m + m . mi mv 1 , . f 300 1 , .
|
|
: (∂ h / ∂ d ) = tg υ; (∂ h / ∂υ) = d cos 2 υ (7.16):
m = tg m + ( d 2 / cos ) ( m / ρ 2 (7.17) ρ ; ρ = 57,3 = 3438' = 206265''.
(7.17), . -30 ( m υ = 0,5') d = 100 , 1:300 υ ≤ 5, 0,04 100 . 12 . , . 9 16 , .