Interface Specification Document
6.3.5 UDP
Ports
All Data on the Ethernet uses different UDP Ports. The Base UDP port is the one you have se-
lected for the Processor. The others are offsets to the base.
UDP PORT
OFFSET
TYPE OF DATA
0 Bathymetric
Data
+1 Sidescan
(optional)
+2
Control / Status
+3 Alarm
+4 Snapshot
+5
Raw Beam Data (optional)
+6
Snippet Data (optional)
The download port for new Firmware has a fixed port, 8100.
6.3.6 Bathymetric
Data
There are two different Bathymetric Data formats, R and RI Theta. The two formats are described
in structures. The data types that are used are defined as follows and are in Big Endian.
Data Type
Bytes
char 1
short 2
long 4
6.3.6.1 Time
Stamp
The DATA_TIME Struct are used for time stamping:
struct DATA_TIME
{
unsigned long Seconds;
// Seconds since 00:00:00, 1 January 1970.
unsigned long Millisecs;
// Milliseconds, LSB = 1ms.
};
The Time in the DATA_TIME Struct is based on UTC message from GPS passed through the
DAC System to the Processor.
6.3.6.2 Sonar
Latency
The drawing below shows the ping timing sequence. It illustrates the processor’s three-ping la-
tency.
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SeaBat 8101 Operator's Manual
6-26
(ISD Rev 1.23) Version 3.02
