YSI SonTek ADVField, Technical Documentation Manual

Page: 110 / 228

SonTek/YSI
98 ADVField Operation Manual (September 1, 2001)
A2.2.1 Recorded Data Files
Each time a new deployment is started (i.e., by the
Deploy
command), the ADVField firmware
creates a new file (or deployment) on the internal recorder. The name of the file is constructed by
adding a 3-digit sequence number to the name of the deployment (set using the
Deployment
command). For example, if the deployment name is
WAVES
, the first time the
Deploy
command is
used a file named
WAVES001
will be created. If subsequent deployments are initiated with the
same deployment name, new files will be created with increasing sequence numbers (e.g.,
WAVES002
,
WAVES003
, etc.).
A2.2.2 Data Block Description
Each deployment file contains two types of data blocks. The first block contains the ADV de-
ployment configuration. This is created when you execute the
Deploy
command. It contains a
complete description of the ADV as well as the current settings for all parameters. The configura-
tion block has a total size of 441 bytes.
After the configuration block, the ADV records one data block for each sampling burst. These
blocks contain the burst header information including date and time from the real-time clock, a
time-series of samples collected during the burst, and statistics calculated at the end of each
burst. The type and amount of data recorded with each sample will vary depending on the setting
of the data recording parameters (see §3.7).
Each burst data block begins with a header record (60 bytes) that contains the date/time at the
start of the burst, parameters that describe the data contained in the block, and the status of the
ADV. Following the header are as many consecutive sample records as specified by
Samples-
PerBurst
. If the
RecordStat
=
YES
, an additional record is stored after the last sample with the
statistics for the burst. The last part of the burst is a 2-byte checksum the burst data.
•
Configuration Block (441 bytes)
o
Hardware configuration (24 bytes)
o
Probe configuration (164 bytes)
o
Deployment parameters (253 bytes)
•
Data Block for Burst 1 (variable size)
o
Burst header (60 bytes)
o
Sample 1 (variable size)
o
Sample 2 (variable size)
o
! ! ! ! !
o
Sample <SamplesPerBurst> (variable size)
o
Burst statistics (optional; 36 bytes)
o
Checksum (2 bytes) [see §A1.2.2 for details on computing the checksum]
•
Data Block for Burst 2 (variable size)
•
! ! ! ! ! ! ! !
•
Data Block for Burst N (variable size)