  ǥ ȯ program    

1) GPS ϴ WGS84 ڰ ϴ  Ÿü ȯ( ȯ)
2)  ǥ ȯ( ȯ)
3)  ǥ ȭ Էâ ԷϿ   ϴ  ٿ, ȯ ʿ Ķ͵  ǥ Ͽ ԷϿ Ѳ Ͽ   Ͽ ϴ ϰȯ  ߰ Ǿ. (Ver 2.0)
4) WGS <->   ȯ     Ű  ̸, Ǽο  ۾ Ű ԽŰ , ȯ  1 -   ̰ ִ. ̸ ϱ Ͽ,  α׷ WGS   ƴ      ֺ  WGS-  踦 ̿Ͽ  ٽ  ֵ ϴ  ߰Ͽ. (Ver 2.0)

ϰȯ  Էµϸ + .out Ͽ ǹǷ μ⸦ ϰų ٸ α׷(ĳ, ) ҷ  ִ.

͸ Էϴ  ϰȯ ۼ gtrans.hwp ϰ Ǿ ,   ϰ Էµ  պκп  Ǿִ.
ϰ ȯ  ִ   5000̸,  200 Է  ִ.

 program Ÿü 츮󿡼 ϴ BesselŸü  ϰ
  ,ߺ, ο ⺻   ֵ  浵 ϴ
10.05ʴ ؼ ϰų    ֵ ߴ.
  , ߺ, ο ڵ ȯϰ Ͽ,    Ϸ   ϸ ȴ.
    Ÿü  ǥ( UTM) ڰ Է° ϵ ߴ.

1. WGS84    ȯ
     .
   1) WGS84  ߽ǥ ٲ۴.
      ̶ WGS84Ÿü ݰ, 򵵰 ȴ
   2)  WGS84߽ǥ踦  Ÿü ߽ǥ ȯѴ.
      ̶  Ÿü ݰ,   ȯ Ű  ȴ
   3)  Ÿü ߽ǥ  Ÿü  ȯѴ.
   4) ȯ 1  Ķ͵(dphi, dlam, dh) Ͽ Ѵ.
   5)  Ϳ Էµ WGS-     Ͽ Ѵ.

2.  ǥ ȯ
   Էµ Ÿü ݰ, ,  ,  X, Yǥ  
   ô Ͽ ȯѴ.

ȯ ϴ   program  Ǵ gpsreadme.hwpǴ ٸ    ,
source program gps.bas .

** ڷ **

1 Ÿü 
   GPS Ÿü : WGS1984   ݰ a = 6 378 137 m
                               f = 1 / 298.257 223 563
   츮  Ÿü : Bessel1841 ݰ a = 6 377 397.155
                                      f = 1 / 299.152 812 8

2. WGSǥ 츮 Besselǥ ȯ Ű 
  ȯ Ű ڿ     ټ ̰ ,     .

 dx, dy, dz, omega, phi, kappa, ds 
a) 128.535, -482.401, -664.745, 2.2004, 0.2038, -3.483, -0.3281 : Ǵ Moldensky ȯ
b) 199.538, -467.589, -607.207, 2.2004, 0.2038, -3.483, -0.3281 : Ǵ Bursa ȯ
c) 127.046, -478.916, -665.615, -2.156, -2.341, 1.714, -5.626   : ӿ 
d) 146.43   -507.89   -681.46, 0, 0, 0, 0 :   ۾
d-1) 115.80  -474.99  -674.11   1.16  -2.31  1.63   -6.43 ۾(2002.12.31)
e) 147, -506, -687, 0, 0, 0, 0 : ̱ α׷ , Tokyo datum, south Korea
f) 144.778, -503.702, -684.67, 0, 0, 0, 0 :  ӿ    <=== õ
g) 105.627, -462.37, -643.258, 0, 0, 0, 0 : GPS Korea
h) Ÿ
   128, -481, 664, 0, 0, 0, 0
   1472, -5002, 6872, 0, 0, 0, 0
   14820, 5075, 68520, 0, 0, 0, 0
    ﰢ Ͽ test , ۾, ӿ  3 parameter  , GPS Korea
  ü ȣ  .  Դ  10 Դ  m ȯ ̰ ߻, Ư ǥ
  ̵   ̰ ũǷ, ȯ ϴ   ̿ Ͽ ѹ 
  ϴ  ʿ  ȴ.

Datum.dat Ͽ  Ǵ Ÿü Ű ִ.

3 Ÿüκ ǥ ϱ

  WGSκ  Ÿü   Ÿü ȯ  ǥ     ִ.
   ǥ = Ÿü - geoid  ȴ.
    program   Ͽ geoid Ѵ. WGS   ȯϴ Ű   ޶,  󼭵 ޶. 츮 αٿ WGS Ÿü geoid 23 ~ 29m̸, Bessel Ÿü geoid -42 ~ -65m  Ѵ.  program       ϵϰ ִ.   Ϳ ִ WGSŸü - Ÿü ǥ 踦 Ͽ Ѵ.      پ,  Ȯ  ƴϹǷ  Ǹ Ѵ. ֱٿ 츮 ̵ ⿡    ǰ ִ(հб).  ǥ Ͽ     ȴ.


4  ǥ ȯ꿡 Ǵ    ô

    츮  ǥ ȯϴµ Ⱦ ī(Transverse Mercator)  ϸ,
    ǥ  ô  .

   ο     = 38     x = 500 000
              浵  = 125    y = 200 000
   ߺο   浵  = 127
   ο   浵  = 129
   ô mo (Ǵ S0) = 1.0000 (  0.9999, 0.9996 )

  츮 迡 Ե ְ ϱ Ͽ 浵 10.405ʸ Ѵ.
   ο   = 125- 00- 10.405Ȱ y = 200 000 ȴ. ﰢ ǥ 󼭴 ̰
  ؼ Ÿ 쵵 ְ  ʰ ǥ 쵵 ִ.

  UTM ȯ ϱϿ  Ͽ ԷѴ.
  Ÿü ݰ   (츮  Besselġ)
  ǥ  : 0 
                 Xo  : 0 (ݱ  10 000 000)

           浵 : 123 (120  126 )
                    129 (126  132 )
                   Yo  : 500 000
           ô = 0.9996
