User`s guide

Chapter 5 - I/O Commands
MARINE FILTER SELECT COMMAND (@@AN)
Applicability: M12+ positioning receivers
The Marine Filter command controls the velocity filtering feature. The velocity filter is useful in
marine applications to filter out some of the wave motion in the reported velocity.
The filter is a single order alpha filter, where alpha is the value entered by the user ranging from
10 to 100 in increments of one. Alpha is then used in the filtered velocity solution representing
10% to 100% of the last calculated velocity, the remainder of which uses the previously reported
velocity.
If a value of 10 is entered for alpha, the maximum filtering will be done. An alpha value this low
must be used with caution; the reported velocity will have extreme latency. An alpha value of 100
will result in no filtering, which is the default alpha value.
Default value: 100
Legacy Code Compatibility: The @@AN command structure detailed here is identical to that
used on the earlier M12, GT+, and SL receivers.
Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05
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