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IMAGENEX TECHNOLOGY CORP.
16SEP15
MODEL 852 DIGITAL SONAR HEAD
MODEL 852 DIGITAL ECHO SOUNDER
DATA STORAGE FILE FORMAT (.852)
When recording the sonar and/or echo sounder data to a
.852
file, the following bytes are
appended and saved to the file every 'shot':
Byte #
Description
0 to 99
File Header
(100 Bytes)
100 to 111
Sonar / Echo Sounder Return Data Header
(12 Bytes)
112 to
xxxx
Sonar / Echo Sounder Return Echo Data
(0, 252 or 500 Bytes)
xxxx
= 112+above number
Byte
xxxx
always =
0xFC
(Termination Byte from sonar or echo
sounder)
xxxx+1
to
yyyy
Zero Fill
yyyy
= 127, 383 or 639
FILE HEADER
Bytes 0 through 99 contain the following
File Header
information:
0
ASCII '8'
1
ASCII '5'
2
ASCII '2'
3
nToReadIndex
- Index for Number of Data Bytes
0 = 0 Data Bytes (IPX data)
2 = 252 Data Bytes (IMX data)
3 = 500 Data Bytes (IGX data)
4-5
Total Bytes
- number of bytes that are written to the disk for this shot
Byte 4
Byte 5
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
128 (for IPX), 384 (for IMX) or 640 (for IGX)
