———————————————————— —
—
Then the residual parallaxes are assumed to be caused by translations
dx , dy, a rotation da of one of the grids and the errors of the measure-
ments. The measured parallaxes dx and dy can consequently be expressed
in accordance with parts of (3) and (4) above or in formulae as working
correction equations according to (5) and (6)
<
H
dx, - ydo - dx (7)
Vv
4 dy + xda - dy (8)
We apply (7) and (8) to the 25 points of Fig.2 and find immediately the
normal equations, from which dx, dy and da are determined under the
condition that [v v ] * [v v ] = minimum.
x x y y
H
e
25 dx - [dx]
o
25 dy, - [dy]
Il
©
2 |
100a" do - aN 3 = 0
The solution is |
dx [dx]
o 25
Nass
da. | = To
N,53 is identical with the expression which was demonstrated above
under 1.3. The weight numbers are
1
Q, x 3/78
oo
Quo o
YoYo
gy x of) ngoud d
o 10Ca
Further
2 2 NA
[vv] = [dx^] + [dy^] i - 100
Jam