4 
Contents 
Preface 
6 
1 
Introduction 
7 
2 
General remarks 
9 
2.1 
Recording systems 
9 
2.2 
Levels, standards and constants 
10 
2.3 
Special measurements 
11 
3 
Absolute measurements 
11 
3.1 
Declination and inclination 
11 
3.2 
Horizontal and total intensity, vertical component 
11 
4 
Digital recording system 
12 
4.1 
Base line values 
12 
4.2 
Scale values, temperature coefficients and cross talk 
13 
5 
Data processing 
13 
6 
Indices 
14 
7 
Contents of the CDrom 
14 
8 
References 
17 
Appendix 1: 
Figures and Tables 
Figure 1.1 
Base line values 1996 
18 
Figure 1.2 
1997 
19 
Figure 1.3 
1998 
20 
Figure 1.4 
1999 
21 
Figure 2.1 
Daily mean values 1996 
22 
Figure 2.2 
1997 
23 
Figure 2.3 
1998 
24 
Figure 2.4 
1999 
25 
Figure 3 
Epoch values 
26 
Figure 4 
File set on CDrom 
27 
Table 1.1 
Base line values 1996 
29 
Table 1.2 
1997 
30 
Table 1.3 
1998 
31 
Table 1.4 
1999 
32 
Table 2.1 
Monthly mean values 1996 
33 
Table 2.2 
1997 
34 
Table 2.3 
1998 
35 
Table 2.4 
1999 
36 
Table 3 Epoch values 
37 
Table 4.1 
Statistics of indices 1996 
Table 4.2 
1997 
Table 4.3 
1998 
Table 4.4 
1999 
38 
39 
40 
41