Guralp-systems CMG-6T Manuel d'utilisateur télécharger pdf (Page 11)

Operator's Guide

6. Each data stream has a Stream ID, a six-character string unique

to it. Stream IDs normally identify the instrument, component

and sample rate of each stream. Thus the stream 1026Z2 refers

to a Z-component stream from instrument 1026, at tap 2.

Data streams ending in 00 and 01 are status streams containing

any extra information sent from the digitizer. Streams with IDs

ending in IB are InfoBlocks and can be configured to contain

calibration information for the attached sensor. Please see the

relevant digitiser manual for more information.

7. To view data, select a stream and then double-click to open a

Waveview window.

You can view several streams at once by holding down SHIFT

as you select, and then double-clicking the selection.

8. To start recording new data to a file, right-click on a stream or a

selection of streams and choose Start recording from the pop-up

menu. Recording settings, directories, etc., can be altered by

selecting File Setup...→ from the main menu and switching to

the Recording tab.

2.6 Installation notes

For the best possible results, a seismometer should be installed on a

seismic pier in a specially-built vault, where conditions are near

perfect. Here, wave-trains arriving at the instrument reflect very well

the internal motion of subsurface rock formations. However, this is not

always feasible. For example,

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Guralp-systems CMG-6T Manuel d'utilisateur Page 11