Full text: Commissions III (Part 5)

-28- 
Ref erring to equations 15, 16 and 17 the following partial 
derivatives could be obtained: 
¿fax) 
¿fa AX) 
) fax) 
¿(S3) 
¿(ax) 
c5 (c/A<v) 
¿fax) 
¿fax) - 
¿far) _ 
¿fas) 
¿far) 
() c/ax) 
¿(&r) = 
¿ fa'au/) 
b (At) 
¿fax) ' 
a (**) 
~WJj " 
fafafa) 
¿faA fa) 
¿(a//) 
¿M " 
(aX) 
~b(Jx) ' 
+ c/AX 
_ x J ) _ xr 
J-5V 3 
o 
-Y + fa 
XY 
3 
x x k z 
-5 
_ 
¿z 
£> 
+ z - 
zx 
£ 
y Y 
3 
- Y 
fa. - jC 
2 TW 
(57) 
(58) 
(59) 
(60) 
(61) 
(62) 
(63) 
(64) 
(65) 
(66) 
(67) 
(68) 
Before combining equations 57 thru 68 with equations 50 thru 53 to 
get the values of f4 A y and f-i A |_|, as given in equations 54 thru 
56, the propagation of errors in the quasi-observations, as well as 
those in A X , A Y and AH , should be studied. 
According to equations 50 thru 53, the accuracy (mean square 
error) of the different quasi-observations at any model N can be given 
(69) 
(70) 
(71) 
(72) 
as follows:
	        
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