Gemini Software Operation
Gemini 720is Imaging Sonar
Document: 0703-SOM-00002, Issue: 7
42
© Tritech International Ltd.
Note
Compression is applied before the software receives the sonar data and
therefore compression cannot be applied to data that has already been recorded.
Conversely, recorded data that has been compressed cannot be uncompressed.
Acquisition Speed
Acquisition speed is another mechanism available for reducing the sonar data rate and
required bandwidth. When the
Half Speed Acquisition
button is enabled (blue
background) the software will reduce the sonar image acquisition speed to approximately
half the maximum rate.
Note
Reducing the acquisition speed can also be useful if acoustic multipath is causing
false moving/transient targets to be observed in the sonar image.
Serial Inputs
Data from external serial sensors can input to the software via a Gemini Hub, the computer
COM Ports or via the additional serial ports on the Gemini unit itself. These options can be
enabled/disabled using the provided drop-down menus. See Section 5.3, “Serial Data Input”
for a detailed description of the related settings and options.
The
Gemini Hub
and
COM Ports
options can only be altered when the software is offline.
5.2.3. Application Settings
Units
The
Units
control selects between Metric and Imperial units. The selected unit type is then
used throughout the program to display measured values. For example, a Sound Velocity
displays as 1499.2m·s
-1
using Metric and 4918.64 ft·s
-1
with Imperial.
