Subject: Product Outage/Anomaly: Update #4 Jason-2 is in Safe Hold This is a multi-part message in MIME format. --Boundary_(ID_2snoq3PDdA23xy3HR4pzbg) Content-type: text/plain; charset=windows-1252; format=flowed Content-transfer-encoding: 7BIT *Update #4: * *Jason-2 was moved in early July to a new LRO (Long Repeat Orbit) orbit 27 kilometers below its previous altitude. The new orbit was reached on July 8 and the onboard instruments resumed nominal operations on July 11. The ground processing resumed and the analysis of the instrument calibrations and Operational and Interim Geophysical Data Record (OGDR and IGDR) products demonstrate that everything is nominal on the spacecraft. Near Real-time operational production and distribution (via DDS and PDA) of Jason-2 Operational Geophysical data Records resumed on July 24 with Rev 42600. Update #3: * **The last maneuver to move the Jason-2 spacecraft into its Long Repeat Orbit (LRO) is scheduled to be executed 04:26 UTC on July 10 with **an expected change of +46 m in the semi-major axis. The Poseidon-3 and Advance Microwave Radiometer (AMR) instruments are scheduled to be turned back on at 09:19 UTC on July 11.* Update #2: During the Joint Steering Group held on June 20, due to the gyro 1 and 2 status that will require more investigating, the global aging of the spacecraft, and the already existing recommendation from the Ocean Surface Topography Science Team to move it to a new orbit at 1309.5 km, it was decided to start the maneuvers to that new orbit as soon as reasonably possible. Maneuvers to a Long Repeat Orbit (LRO) will start on July 3, with hopes of reaching the LRO by July 8. If the spacecraft status is still green, the instruments will be restarted the following week (from July 10). CNES will continue to investigate the gyros, in parallel with the mission restart.* Update #1: CNES continues to investigate the Jason-2 spacecraft status with regards to its gyros. 2 of its 3 gyros are showing an abnormal behavior, very likely due to their ageing during 9 years in the difficult radiation environment experienced at a 1336 km orbit. As 2 gyros out of 3 are required to ensure nominal attitude control, no mission recovery has been possible for the moment, nor is planned within the next few days : actions for recovery are however ongoing and CNES is still optimistic about resuming Jason-2 data production in the future. A Joint Steering Group will be held June 20th to discuss future plans on Jason-2.* Topic: * No data was received from Jason-2 on Pass 41736, Jason-2 Satellite is in Safe Hold Mode.* **Date Issued:* July 26, 2017 1700Z *Product(s) or Data Impacted:* Jason-2 OGDRs distributed via DDS and Class users. *Date/Time of Initial Impact:* May 17, 2017 2208Z *Date/Time of Expected End:* July 24, 2017 0838Z * Length of Event:* 67 days 10 hrs 30 mins *Details/Specifics of Change: *During Rev 41736, We observed no telemetry for Jason-2 using Usingen 1 Earth Terminal. We initially switched to Usingen 2 Earth Terminal to eliminate the possibility of a fault at the Usingen 1. Next, we attempted Low Rate at Usingen 2 and received no telemetry. After switching back to Usingen 1 and going to Low Rate, we received telemetry, but with less than 2 minutes before Loss-of-Signal. We have begun recovery steps from Safe Hold Mode, and are coordinating with CNES. * Contact Information for Further Information: *ESPCOperations@noaa.gov at 301-817-3880. 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 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_2snoq3PDdA23xy3HR4pzbg) Content-type: text/html; charset=windows-1252 Content-transfer-encoding: 8BIT Jason-2 NOTIFICATION Update #4:
Jason-2 was moved in early July to a new LRO (Long Repeat Orbit) orbit 27 kilometers below its previous altitude. The new orbit was reached on July 8 and the onboard instruments resumed nominal operations on July 11. The ground processing resumed and the analysis of the instrument calibrations and Operational and Interim Geophysical Data Record (OGDR and IGDR) products demonstrate that everything is nominal on the spacecraft. Near Real-time operational production and distribution (via DDS and PDA) of Jason-2 Operational Geophysical data Records resumed on July 24 with Rev 42600.

Update #3:
The last maneuver to move the Jason-2 spacecraft into its Long Repeat Orbit (LRO) is scheduled to be executed 04:26 UTC on July 10 an expected change of +46 m in the semi-major axis. The Poseidon-3 and Advance Microwave Radiometer (AMR) instruments are scheduled to be turned back on at 09:19 UTC on July 11.

Update #2: During the Joint Steering Group held on June 20, due to the gyro 1 and 2 status that will require more investigating, the global aging of the spacecraft, and the already existing recommendation from the Ocean Surface Topography Science Team to move it to a new orbit at 1309.5 km, it was decided to start the maneuvers to that new orbit as soon as reasonably possible. Maneuvers to a Long Repeat Orbit (LRO) will start on July 3, with hopes of reaching the LRO by July 8. still green, the instruments will be restarted the following week (from July 10). parallel with the mission restart.

Update #1: status with regards to its gyros. 2 of its 3 gyros are showing an abnormal behavior, very likely due to their ageing during 9 years in the difficult radiation environment experienced at a 1336 km orbit. As 2 gyros out of 3 are required to ensure nominal attitude control, no mission recovery has been possible for the moment, nor is planned within the next few days : actions for recovery are however ongoing and CNES is still optimistic about resuming Jason-2 data production in the future. A Joint Steering Group will be held June 20th to discuss future plans on Jason-2.

Topic: Jason-2 Satellite is in Safe Hold Mode.

Date Issued: July 26, 2017 1700Z

Product(s) or Data Impacted: Jason-2 OGDRs distributed via DDS and Class users.

Date/Time of Initial Impact: May 17, 2017 2208Z

Date/Time of Expected End: July 24, 2017 0838Z

Length of Event: 67 days 10 hrs 30 mins

Details/Specifics of Change: no telemetry for Jason-2 using Usingen 1 Earth Terminal. We initially switched to Usingen 2 Earth Terminal to eliminate the possibility of a fault at the Usingen 1. Rate at Usingen 2 and received no telemetry. After switching back to Usingen 1 and going to Low Rate, we received telemetry, but with less than 2 minutes before Loss-of-Signal.

We have begun recovery steps from Safe Hold Mode, and are coordinating with CNES.

Contact Information for Further Information: ESPCOperations@noaa.gov at 301-817-3880.

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 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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