Kongsberg Simrad ST90, Reference Manual

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Description
The
Ping-Ping Filter
presents the echoes based on the current information as well as the
"history" of that specific target. The filter adds historical echo data for the target to the new
information from the same target. This "mix" causes a more stable presentation, and some
interference and noise are removed and/or reduced. The three different settings define how
much "weight" and "priority" the latest echo data is given compared to the historical echoes.
The
Ping-Ping Filter
takes the vessel movements into account. For this reason, a fast moving
target will be presented weaker than it actually is.
The following filter options are provided:
•
Off
: Select
Off
to disable the filter. The historical information from previous
transmissions ("pings") are not used to remove noise and unwanted echoes.
•
Weak
: Select Weak to allow the filter to compare the echoes from the latest two pings.
For the current echo to be shown, it must be present in both of these pings.
•
Medium
: Choose Medium to compare the echoes from the latest four pings. For the
current echo to be shown, it must be present in all of these pings.
•
Strong
: Select Strong to allow the filter to compare the echoes from the latest eight pings.
For the current echo to be shown, it must be present in all of these eight pings.
Simrad ST90 Reference Manual