Terra Satellite in Safe Mode as of 14:33 UTC

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kathys
Posts: 487
Joined: Tue Jun 22, 2010 4:51 pm

Terra Satellite in Safe Mode as of 14:33 UTC

Post by kathys »

We have been informed that the Terra spacecraft entered safe mode on DOY 049 (18 February 2016) at 1433z.

The Terra Flight Operations Team is currently investigating.

Additional information will be provided as it comes available.
kathys
Posts: 487
Joined: Tue Jun 22, 2010 4:51 pm

Re: Terra Instrument in Safe Mode as of 14:33 UTC

Post by kathys »

Updated information:

From NASA Goddard Space Flight Center:

Spacecraft is currently in a stable configuration however there is no science data being collected. Recovery is likely to
take multiple days. Will post message when Terra MODIS is again available via direct broadcast.
kathys
Posts: 487
Joined: Tue Jun 22, 2010 4:51 pm

Re: Terra Instrument in Safe Mode as of 14:33 UTC

Post by kathys »

From NASA, 6:34 PM, 22 February 2016

All,

Terra spacecraft remained in safe hold throughout the weekend allowing time for the Flight Operations Team to determine cause of entry into safe hold, develop recovery procedures, test against simulator and present to Anomaly Review Board plans for recovery. Today, February 22, 2016, the recovery procedures were approved. The Flight Operation Team was successful in restoring operations to the Spacecraft Computer. Instrument recovery activities will start tomorrow and likely take multiple days.

We will send out an update when MODIS Direct Broadcast is available.

Regards,

Eric Moyer
kathys
Posts: 487
Joined: Tue Jun 22, 2010 4:51 pm

Re: Terra Instrument in Safe Mode as of 14:33 UTC

Post by kathys »

From NASA, 4:43 PM CST, 24 February 2016

The MODIS Instrument was configured for science today, February 24, 2016 at approximately 20:30 UTC. The instrument temperatures are stabilizing, but data should again be available via direct broadcast. If not receiving the data, please let me know.

Regards,

Eric Moyer
kathys
Posts: 487
Joined: Tue Jun 22, 2010 4:51 pm

Re: Terra Satellite in Safe Mode as of 14:33 UTC

Post by kathys »

For NASA Terra Users,

Further information about the quality of Terra data for more specific date ranges following Feb 24, 2016 (day 055):

Terra MODIS was transitioned to science mode on Feb 24, 2016 (day 055) after being in safe mode since Feb 18, 2016 (day 049). Though the data is currently being acquired and processed at MODAPS and NRT, users are advised to exercise caution in using the products in any application. Products from period 055 - 058 might have been severely degraded due to abnormal operating temperature for the SWIR and LWIR FPA and hence products may not be usable in any application. Though the focal plane temperatures have reached the stable operating value as of day 060 some products may still have been impacted by the increased noise in some of the detectors in the thermal bands. Users are requested to exercise caution in using the products until further notice.
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