Subject: Administrative:; SNPP VIIRS 2015 June 30 Leap Second This is a multi-part message in MIME format. --Boundary_(ID_0Vpz0kwrTq5jvkGZB9nWMA) Content-type: text/plain; charset=UTF-8; format=flowed Content-transfer-encoding: 8BIT * Topic:* SNPP 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 This message was sent from ESPC.Notification@noaa.gov . You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov or (301) 817-3880 . Please note: it may take up to two business days to process your unsubscribe request. --Boundary_(ID_0Vpz0kwrTq5jvkGZB9nWMA) Content-type: text/html; charset=UTF-8 Content-transfer-encoding: 8BIT

Topic:  SNPP 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
This message was sent from ESPC.Notification@noaa.gov. You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noaa.gov or (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request.

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