User`s guide

Chapter 5 - I/O Commands
VISIBLE SATELLITE DATA MESSAGE (@@Bb)
Applicability: M12+ Timing and Positioning Receivers
This command requests the results of the most current satellite visibility computation. The
response message gives a summary of the satellite visibility status showing the number of visible
satellites, the Doppler frequency and the location of the currently visible satellites. The reference
position for the most recent satellite alert is the current position coordinates.
Note that these coordinates may not compare to the GPS receiver’s actual position
when initially turned on, since the GPS receiver may have moved a great distance
since it was last used.
Note: Each @@Bb message from the M12+ will contain information for a maximum of 12
satellites. If less than 12 satellites are visible, unneeded fields will be filled with zeros. If there are
more than 12 visible SVs visible, then details (SVID, Doppler, Elevation, etc.) of ONLY the 12
highest SVs will be reported in the message.
Default mode: Polled
Legacy Code Compatibility: The @@Bb command has been implemented in an identical fashion
on virtually all Motorola Oncore receivers.
Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05
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