Topic: S-NPP VIIRS 2015 June 30 Leap Second Insertion
Date/Time Issued: June 26, 2015 1650Z
Product(s) or Data Impacted: All Suomi-NPP Sensor Data
Date/Time of Initial Impact: June 30, 2015 23:59:60 UTC
Date/Time of Expected End: July 01, 2015 01:02:23 UTC
Length of Outage: See Details
Details/Specifics of Change:
This is an informational notice. Notification is being sent in order to assure the community is aware of JPSS/SNPP plans for this activity and SNPP data users are also ready for this adjustment.
A positive leap second will be inserted into all systems, SC and Ground, scheduled to occur at June 30, 2015 at 23:59:60.
The sequence of dates of the UTC second markers will be:
2015 June 30, 23h 59m 59s
2015 June 30, 23h 59m 60s
2015 July 1, 0h 0m 0s
June 30, 2015
23:59:60 UTC – 23:59:60 UTC Leap Second insertion via GPS GPS leap second insertion
July 01, 2015
00:00:10 UTC – 00:00:10 UTC On-board command to update SCC time to match GPS time; attitude error introduced from shift in ephemeris.
00:00:15 UTC – 00:00:15 UTC On-board command to reset orbit propagator to match GPS vector; attitude error introduced from updated ephemeris.
00:48:39 UTC - 01:02:23 UTC SVL 19205. SCC Table 58 Upload – Updates J2000-TOD and True-Time-Offset; final attitude errors resultant from Leap Second activities.
Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov and 301-817-3880
Web Site(s) for applicable information: N/A
SNPP VIIRS 2015 June 30 Leap Second Insertion
Re: SNPP VIIRS 2015 June 30 Leap Second Insertion
A correction to the expected End Time:
The Expected End Time has been updated to: 01:28:57 UTC
The Expected End Time has been updated to: 01:28:57 UTC