Guralp Systems CMG-EDU User Manual

Page 26

CMG-EDU

X the date represented as an 8-digit hexadecimal number (this allows a
complete date to fit in the DOS 8.3 format, for compatibility),

I the System ID,

T the Stream ID (e.g. DM24Z2),

C the component identifier (Z,N,E,M, etc.),

P the sample rate, in samples per second;

A the name of the stream, if you have set a mapping, otherwise the
same as T.

The specifiers MM, DD, HH, NN, SS, RRR, JJJ, IIIIII and TTTTTT are

the same as their single-letter counterparts, but they are padded with
zeros or underscores to a constant length. YY can also be used for a 2-
digit abbreviation of the year (e.g. 03 for 2003), and MMM for a 3-letter
month name (jan, feb, etc.)

Any other letters (including small letters) in the filename will be left as

they are, so you can add constant descriptions or field separators as
you wish. Owing to operating system limitations, you cannot use any

of the punctuation marks * ? " : < > | in filenames. You can
create directory structures by using the \ character.

For example:

T\YYYY_MM_DD;HHhNNmSSs

will give filenames like

dmz2\1997_10_05;07h35m20s.

You should always ensure that files are given unique names. Scream!
writes each stream separately. If it finds that it cannot write to a file

because it is already open for another stream, the write will fail and
data will not be recorded.

Data Format: Selects the format of the recorded data files. Options are
GCF, SAC, MiniSEED, P-SEGy, PEPP, SUDs, GSE, UFF (ufa and ufb;

see below), and CSS. A single Scream! can only record in one format at
a time.

Byte Order: For SAC, SEG-y, UFB and CSS files, the byte order of the
files can be specified. This can be used to match the byte order with

the native order of the platform where you are going to perform
analysis. GCF and MiniSEED are defined to be in “Motorola or SPARC”

byte order. PEPP and SUDs data is defined to be in “Intel” byte order.

Issue A