User`s guide
Chapter 5 - I/O Commands
LEAP SECOND STATUS MESSAGE (@@Bj)
Applicability: M12+ Timing and Positioning Receivers
This message polls the receiver for current leap second status information that has been decoded
from the Navigation Data message received from the GPS satellites. The data sent back by the
receiver provides specific date and time information pertaining to any future leap second addition
or subtraction.
Leap seconds are occasionally inserted in UTC and generally occur on midnight UTC June 30
th
or midnight UTC December 31
st
. The GPS control segment typically notifies GPS users of
pending leap second insertions to UTC several weeks before the event.
When a leap second is inserted, the time of day will show a value of '60' in the seconds field.
When a leap second is removed, the date will roll over at 58 seconds.
The 'current UTC offset' will be zero if the receiver is set up to run in GPS time mode instead of
UTC.
Default mode: Polled
Legacy Compatibility: The @@Bj message was used in an identical manner in virtually all
Motorola receivers.
Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05
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