68 
Table 14. Weight and correlation numbers. The Nacka test field. 
*0 
^0 
c 
c X 0 
io- 2 
cY, 
10- 2 
c Z 0 
io- 2 
c (p 
C CO 
C K 
*0 
2.032 
>0 
0.003 
3.143 
C 
—0.197 
0.007 
2.062 
c Xq 10 —2 
—2.008 
—0.063 
—4.323 
36.380 
c Y 0 10- 2 
—0.003 
3.765 
0.006 
—0.053 
10.408 
c Z 0 10- 2 
—0.065 
—0.003 
—0.741 
1.854 
—0.003 
0.295 
c <p 
2.124 
—0.016 
0.684 
—9.086 
0.013 
—0.311 
3.683 
C (X). 
0.002 
1.915 
0.005 
—0.044 
1.161 
—0.002 
0.011 
1.428 
C K 
—0.002 
—0.049 
—0.003 
0.029 
—0.135 
0.001 
—0.007 
—0.015 
0.195 
for c — 150 mm, that the standard errors of points on the ground must be 4 mm 
and on the antennas 2 mm. Even if we could tolerate 3 and perhaps 4 ^m on the 
negative this does not help us very much, because the geodetic work would be 
very difficult to perform, especially for the points on the antennas. Some theo 
dolite observations of the antennas have shown that they are not rigid enough 
for these requirements. Short time variation determined in wind 2—3 m/s near 
ground, no clouds, was of an amplitude 10 mm, and had a frequency of 0.2— 
0.4 c/s. 
Long time variation under the same weather conditions are shown in Fig. 21. 
Fig. 21. 
Long time variation of the positions of the antenna 
points. The movements are determined by theodolite 
observations from a distant station during a sunny 
day. The movements are probably caused by extension 
of the sunlit side of the antennas. 
CC \ t 
+80 Anfenna no 1 + + f 
Ô 3 10 II !Z 13 /4 15- 16 // 
m m 
+120 
+90 
+60 
+30 
0 
-30 
hour