Subject: Product Outage/Anomaly: Jason-2 NOTIFICATION Issued: This is a multi-part message in MIME format. --Boundary_(ID_i7GLJxW481mtUu85oE34lQ) Content-type: text/plain; charset=utf-8; format=flowed Content-transfer-encoding: 7BIT *Topic:* Jason-2 move to interleaved orbit and associated product outage *Date Issued:* September 16, 2016 1610Z *Product(s) or Data Impacted: J*ason-2 Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR), and Geophysical Data Records (GDR) *Date/Time of Initial Impact: *October 2, 2016 *Date/Time of Expected End:* October 14, 2016 ** *Length of Event:* Approximately 12 days *Details/Specifics of Change:* After approval by the Joint Steering Group held 12 Sept 2016, the Ocean Surface Topography Mission (OSTM)/Jason-2 satellite will be moved to a new ground track early October after the end of repeat cycle 303, after more than 8 years of service on the nominal ground track. The Jason-3 satellite will continue the long term climate data record on the primary Topex, Jason-1, and OSTM/Jason-2 ground track. The OSTM/Jason-2 satellite will be moved to the same interleaved orbit that was used by Topex from 2002-2005 and Jason-1 from 2009-2012. Several maneuvers will be performed beginning on October 2nd , 2016, with the interleaved orbit achieved by October 14, 2016. Please note the following regarding the new OSTM/Jason-2 orbit: OSTM/Jason-2 will use the same pass numbering scheme adopted by Topex and Jason-1 in the interleaved ground track. However, the start time of the OSTM/Jason-2 and Jason-3 repeat cycles will differ by approximately 5 days. The first OSTM/Jason-2 repeat cycle on the new interleaved ground track will be numbered repeat cycle 305. The OSTM/Jason-2 altimeter will be placed in wait mode during the transition to the new ground track. This may have some impact on the calibration of the Advanced Microwave Radiometer (AMR), due to changes in the spacecraft thermal environment. Re-calibration of the AMR will be performed if necessary. Data production (OGDR, IGDR and GDR) will be stopped during the transit to the interleaved orbit. It will restart during cycle 305 with the same requirements for data latency and quality. This is the initial plan as approved by the Joint Steering group. Later messages will confirm the start of activities and also when the satellite will be back to nominal operations. *Contact information for Further Information:* David Donahue Satellite Services Division NOAA/NESDIS/OSPO/SPSD/SPB (301) 683-3236 David.R.Donahue@noaa.gov ** *Web Site(s) for applicable information:* N/A This message was sent by 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.govor (301) 817-3880 . Please note: it maytake up to two business days to process your unsubscribe request. --Boundary_(ID_i7GLJxW481mtUu85oE34lQ) Content-type: text/html; charset=utf-8 Content-transfer-encoding: 8BIT

Topic: Jason-2 move to interleaved orbit and associated product outage

Date Issued: September 16, 2016 1610Z

Product(s) or Data Impacted: Jason-2 Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR), and Geophysical Data Records (GDR)

Date/Time of Initial Impact: October 2, 2016

Date/Time of Expected End: October 14, 2016

Length of Event: Approximately 12 days

Details/Specifics of Change: After approval by the Joint Steering Group held 12 Sept 2016, the Ocean Surface Topography Mission (OSTM)/Jason-2 satellite will be moved to a new ground track early October after the end of repeat cycle 303, after more than 8 years of service on the nominal ground track. The Jason-3 satellite will continue the long term climate data record on the primary Topex, Jason-1, and OSTM/Jason-2 ground track.

The OSTM/Jason-2 satellite will be moved to the same interleaved orbit that was used by Topex from 2002-2005 and Jason-1 from 2009-2012. Several maneuvers will be performed beginning on October 2nd , 2016, with the interleaved orbit achieved by October 14, 2016.

Please note the following regarding the new OSTM/Jason-2 orbit:

OSTM/Jason-2 will use the same pass numbering scheme adopted by Topex and Jason-1 in the interleaved ground track. However, the start time of the OSTM/Jason-2 and Jason-3 repeat cycles will differ by approximately 5 days. The first OSTM/Jason-2 repeat cycle on the new interleaved ground track will be numbered repeat cycle 305.

The OSTM/Jason-2 altimeter will be placed in wait mode during the transition to the new ground track. This may have some impact on the calibration of the Advanced Microwave Radiometer (AMR), due to changes in the spacecraft thermal environment. Re-calibration of the AMR will be performed if necessary.

Data production (OGDR, IGDR and GDR) will be stopped during the transit to the interleaved orbit. It will restart during cycle 305 with the same requirements for data latency and quality.

This is the initial plan as approved by the Joint Steering group. Later messages will confirm the start of activities and also when the satellite will be back to nominal operations.

Contact information for Further Information:
David Donahue
Satellite Services Division
NOAA/NESDIS/OSPO/SPSD/SPB
(301) 683-3236
David.R.Donahue@noaa.gov

Web Site(s) for applicable information: N/A

This message was sent by 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.govor (301) 817-3880. Please note: it may take up to two business days to process your unsubscribe request.

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