Specifications

VP ONCORE COMMAND REFERENCE
Back to Index
LEAP SECOND PENDING STATUS (@@Bj)
This command causes the receiver to send a message to the user
indicating the status of any pending leap second corrections to UTC. If a
leap second is pending, its direction is also indicated. This is a polled-
only output message.
Leap seconds are occasionally inserted in UTC and generally occur on
midnight UTC June 30 or midnight UTC December 3 1. The GPS Control
Segment notifies GPS users of pending leap second insertions before
the event via a special broadcast message in the satellite downlink
message. The receiver decodes this data and then inserts the time
correction in the appropriate one second time bin.
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. See Time of Day @@Aa
command.
NOTE: Although the GPS Control Segment historically has issued Leap
Second Pending messages within a month of the time of the actual Leap
Second event, the message can (and has) been issued as much as six
months ahead of the actual insertion.
93 Synergy Systems, LLC 05OCT01