five 
41) 
  
The standard error of unit weight of the image coordinates is: 
m VE = ve (42) 
3 
The standard error of the standard error of unit weight becomes 
S 
  
so V 6 
tions. 
Seo = ——-  -— 04ls, since there are only three redundant observa- 
The affinity can be expressed by the affinity coefficient: 
de. — de 
A, = x 
C 4a 
=|y| 
  
where a = | x 
  
  
is. ! 
= Rh R3 (43) 
The corrections to the preliminary elements of orientation are found 
as follows 
  
  
c 4a C 4a 
de = — Rast Ro (45) 
8a 
5 ec / 4 … 
dp = — — (— [dx] — R5 — Rg (46) 
"EE a ( ; ie ; 
5 c2 /4 
do = — — [— [dy] — R; — Rg 47 
cdo Sr : [dy] «| (47) 
[dx] = cde 
Ee e CE (48) 
dx”, s + 5 
a, = ET [gp BH) ce (49) 
5 c2 5 
After recomputation of the standard error of unit weight of the 
image coordinate mesurements for the photographs 20 and 2 the follow- 
ing results are found: 
39