ABEM Terraloc Pro 2
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11 Appendix C. The First Arrivals File Format (PCK)
General
This is an ASCII text file format, containing first arrivals for a record. The file is
formatted, so it can be printed on any printer that prints ASCII text.
Each trace is represented on one row, and trace number 1 always starts on line 1. For
each line the following columns are listed
• Time for first arrival picking (ms)
o Note! If no pick has been made this is marked by the time being set to a
negative value. In the example in 11.2 Description traces 16 and 20 has
not been picked and have values “-0.003800”.
• Set value (always 0)
• Source X coordinate
• Source Y coordinate
• Receiver X coordinate
• Receiver Y coordinate
Following the format for this type of files it is of course possible create new first arrival
files manually using a text editor. Be sure however, to save the text in ASCII format
and not in any word-processing format (e.g. WordPerfect or Microsoft Word).
Description
<BEGINNING-OF-FILE>
1: 0.024400 0 23.00 0.00 0.00 0.00
2: 0.023400 0 23.00 0.00 2.00 0.00
3: 0.022400 0 23.00 0.00 4.00 0.00
4: 0.020200 0 23.00 0.00 6.00 0.00
5: 0.018800 0 23.00 0.00 8.00 0.00
6: 0.016000 0 23.00 0.00 10.00 0.00
7: 0.013800 0 23.00 0.00 12.00 0.00
8: 0.013800 0 23.00 0.00 14.00 0.00
9: 0.012200 0 23.00 0.00 16.00 0.00
10: 0.011800 0 23.00 0.00 18.00 0.00
11: 0.007600 0 23.00 0.00 20.00 0.00
12: 0.005200 0 23.00 0.00 22.00 0.00
13: 0.004400 0 23.00 0.00 46.00 0.00
14: 0.008000 0 23.00 0.00 44.00 0.00
15: 0.011400 0 23.00 0.00 42.00 0.00
16: -0.003800 0 23.00 0.00 40.00 0.00
17: 0.012400 0 23.00 0.00 38.00 0.00
18: 0.014400 0 23.00 0.00 36.00 0.00
19: 0.016200 0 23.00 0.00 34.00 0.00
20: -0.003800 0 23.00 0.00 32.00 0.00
21: 0.021600 0 23.00 0.00 30.00 0.00
22: 0.024000 0 23.00 0.00 28.00 0.00
23: 0.025000 0 23.00 0.00 26.00 0.00
24: 0.026000 0 23.00 0.00 24.00 0.00
<END-OF-FILE>