Subject: Administrative: Leap Second Adjustment for NOAA-15, 16, 17, This is a multi-part message in MIME format. --------------030505050302090705000004 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit *Topic*: Leap Second and End of Year Processing *Date/Time Issued: * June 29, 2012 1555 UTC *Satellite(s) Involved*: NOAA-15, 16, 17, 18, 19 and MetOp-A/2 *Instrument(s) Involved*: All *Products) Involved/Affected*: All Products/Geolocations *Date/Time(UTC) of Initial Implementation: *30 June 2012, 2359 UTC *Details/Specifics of Change: *The pass that crosses the boundary between June 30 and July 1 will be affected for data from the NOAA-15, 16, 17, 18 and 19 satellites. Recorders will be stopped just before the end of June and new recordings started at the beginning of July. Simply stated, the last pass of June will be split in two parts with the data from June in the first part and the July data in the second part. Also, the addition of a leap second is planned for the end of June and the July data will reflect the leap second update in the timecodes. Further, all clock drift files have been updated. For NOAA-15, 16, 17, 18 and 19 satellites these updates are made on the ground in the pre-product processor. However, for MetOp-A/2 data processing, NOAA uses the spacecraft internal time codes, which will not be updated to include the leap second until approximately 13:27 UTC on July 1. During this 13+ hour period, a correction will be applied to the MetOp-A/2 data on the ground as part of pre-product processing. However, users should be advised that it is possible that some data will be mislocated as a result of this event. *Contact Information for Further Information:* ESPC Operations at _ESPCOperations@noaa.gov _ at _301-817-3880 _ and/or other contacts as necessary *Web site(s) that contain other relevant information (where applicable): *_http://www.osdpd.noaa.gov/ml/ppp/navpage.html_- History of navigation notices 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 make take up to two business days to process your unsubscribe request. --------------030505050302090705000004 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Topic: Leap Second and End of Year Processing

Date/Time Issued: June 29, 2012 1555 UTC

Satellite(s) Involved: NOAA-15, 16, 17, 18, 19 and MetOp-A/2

Instrument(s) Involved: All

Products) Involved/Affected: All Products/Geolocations

Date/Time(UTC) of Initial Implementation: 30 June 2012, 2359 UTC

Details/Specifics of Change: The pass that crosses the boundary between June 30 and July 1 will be affected for data from the NOAA-15, 16, 17, 18 and 19 satellites. Recorders will be stopped just before the end of June and new recordings started at the beginning of July. Simply stated, the last pass of June will be split in two parts with the data from June in the first part and the July data in the second part. Also, the addition of a leap second is planned for the end of June and the July data will reflect the leap second update in the timecodes. Further, all clock drift files have been updated. For NOAA-15, 16, 17, 18 and 19 satellites these updates are made on the ground in the pre-product processor. However, for MetOp-A/2 data processing, NOAA uses the spacecraft internal time codes, which will not be updated to include the leap second until approximately 13:27 UTC on July 1. During this 13+ hour period, a correction will be applied to the MetOp-A/2 data on the ground as part of pre-product processing. However, users should be advised that it is possible that some data will be mislocated as a result of this event.

Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880 and/or other contacts as necessary

Web site(s) that contain other relevant information (where applicable):
http://www.osdpd.noaa.gov/ml/ppp/navpage.html - History of navigation notices

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 make take up to two business days to process your unsubscribe request.

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