100. 00 
+g 
li 
J 
i 
rd 
i 
for the first stage, with two iterations; P was computed for (x, y, 
z) and X, Y, Z) respectively from: 
EXP (-0,05(Kv/oo) **^ (2.4.4) 
J 
il 
and à à 
EXP(-0,05(V/00) ' ) (2.4.5) 
ae 
Il 
for the second stage, with other two iterations; and recomputed from 
EXP (-0,05(KV/00) ^*9 (2.4.6) 
a 
Il 
and 
FJ 
il 
EXP (-0,05(v/9o) ?*9 (2.4.7) 
for the third and last stage, with two more iterations. K, in 
equation (2.4.4) and (2.4.6) is a multiplication factor, that acts, 
together with the initial weight difference (100 and 1) to show in 
the down strip points coordinates, practically, real size residuals. 
K was experimentaly established arround 4.7. 
To test the algorithm, eight photo strips, analytically formed as 
discrebed in 2.3, were used. Gross errors were itentionally 
introduced in the point coordinates. 
Table 2.4.1 gives the tie point coordinates in both strips. Table 
2.4.2 presents the residual from least squares adjustment, and Table 
2.4.3, the residuals when robust estimation was applied. Many other 
practical tests were made, with the algorithm, that confirm the 
detection power of the approach. 
TABLE 2.4.1 Give the list of strips coordinates of tie points of 
two adjacent strips (upper and down). Point 131 has 
1mm blunder in everyone of its componentes. 
UPPER STRIP DOWN STRIP 
POINT X(mm) Y(mm)  Z(mm) x (mm) y (mm) z (mm) 
*131 1.979 87.058 -193.605 -0.011 -95.472 -189.027 
132 95.136 86.305 -211.690 292.114 -96.922 -208. 397 
125 141.593 132.142 -186.855 138.516 -50.993 -183.550 
133 187.702 85.968 -161.114 184.832 -97.096 -158.024 
134 278.679 84.636 -159.527 275.846 -98.159 -156.687 
142 324.356 37.050 -203.477 321.554 -145.519 -200.855 
135 370.730 83.099 -167.342 367.897 -99.411 -164.732 
170 324.858 83.475 -182.109 321.977 -99.117 -179.396 
* Point in which blunders were introduced. 
- 449 -