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SFI: 103 | Ap index:  4  | Kp index:  0  ( n\a @--:--,  n\a @--:--)| X-ray flux:  n\a 
SW: Density= 0.4 p/cm3 | Speed= 342.5 km/s | Temp=47(x1000)K
IMF: Bx=4.1nT | By=-1.8nT | Bz= 2.1 nT | Bt= 5.0 nT | Lat= 24.9 ° | Lon=336.0°
Sunspots: 41 | Area: 530 10-6/Hemi | New regions: 0
[i]X-ray flares: C=0 M=0 X=0 | Optical flares: M1=0 M2=0 M3=0 | Sub-flares=1
Latest images from the Solar Terrestrial Relations Observatory (STEREO - EUVI/COR1/COR2/HI1/HI2)
Four years after the initial loss of communications anomaly with the Behind observatory, NASA has directed to cease periodic recovery operations with the last support on October 17, 2018.



Solar TErrestrial RElations Observatory (or STEREO) employs two nearly identical space-based observatories. One ahead of Earth in its orbit (STEREO A), the other trailing behind (STEREO B) to provide stereoscopic measurements to study the Sun and the nature of its CMEs. Check the current STEREO positions and ground station coverage.



Beacon images
These are the latest received images from both spacecraft. They are generally of lower quality and resolution. Some factors such as Deep Space Network schedule conflicts may result in delaying the beacon images. Check below for the latest high-resolution images (these are normally delayed by up to 72 hours).

Note: Both HI1 and HI2 images are processed using two different methods. You can swap the different versions by clicking on the full-size image in the popup window.


STEREO A (Earth is to the right (post solar conjunction) in EUVI, COR1 and COR2)
Stereo Ahead EUVI 195 Stereo Ahead COR1 Stereo Ahead COR2 Stereo Ahead HI1 Stereo Ahead HI2
EUVI 195Å COR1 COR2 HI1 STARS/HI1 CME HI2 STARS/HI2 CME
Stereo Behind EUVI 195 Stereo Behind COR1 Stereo Behind COR2 Stereo Behind HI1 Stereo Behind HI2
STEREO B (Earth is to the right in EUVI, COR1 and COR2)
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Latest high-resolution images


STEREO A STEREO B (no contact)

EUVI 171Å EUVI 195Å EUVI 284Å EUVI 304Å EUVI 171Å EUVI 195Å EUVI 284Å EUVI 304Å
Stereo Ahead EUVI 171 high resolution Stereo Ahead EUVI 195 high resolution Stereo Ahead EUVI 284 high resolution Stereo Ahead EUVI 304 high resolutionStereo Behind EUVI 171 high resolution Stereo Behind EUVI 195 high resolution Stereo Behind EUVI 284 high resolution Stereo Behind EUVI 304 high resolution COR1 COR1 rdiff COR2 COR2 rdiff COR1 COR1 rdiff COR2 COR2 rdiff
Stereo Ahead COR1 high resolution Stereo Ahead COR1 RDIFF high resolution Stereo Ahead COR2 high resolution Stereo Ahead COR2 RDIFF high resolutionStereo Behind COR1 high resolution Stereo Behind COR1 RDIFF high resolution Stereo Behind COR2 high resolution Stereo Behind COR2 RDIFF high resolution HI1 HI1 rdiff HI1 STARS HI2 STARS HI1 HI1 rdiff HI1 STARS HI2 STARS
Stereo Ahead HI1 high resolution Stereo Ahead HI1 RDIFF high resolution Stereo Ahead HI1 STARS high resolution Stereo Ahead HI2 STARS high resolutionStereo Behind HI1 high resolution Stereo Behind HI1 RDIFF high resolution Stereo Behind HI1 STARS high resolution Stereo Behind HI2 STARS high resolution

note: The "rdiff" COR and HI images use different type of postprocessing called "running difference". It detects the difference between the current and the previous available frame, thus providing a highlight on the subtle details in the images.

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7-day composite videos (updated daily)
NOTE: Contact with STEREO-B has been lost. As a result the videos may not be updated regularly due to insufficient data.


COR1
COR2
HI1
HI2


EUVI-171
EUVI-195
EUVI-284
EUVI-304


COR1, COR2, HI1, HI2
EUVI-171, EUVI-195, EUVI-284, EUVI-304


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Visible planets

STEREO A (Earth is to the right (post solar conjunction))
Visible planets on Stereo Ahead Coronagraph 1 Visible planets on Stereo Ahead Coronagraph 2 Visible planets on Stereo Ahead Heliospheric Imager 1
Visible planets on Stereo Behind Coronagraph 1 Visible planets on Stereo Behind Coronagraph 2 Visible planets on Stereo Behind Heliospheric Imager 1
STEREO B (Earth is to the right)
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IMPACT/PLASTIC solar wind data

Solar wind data plot by IMPACT/PLASTIC
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Status and upcoming events:



STEREO A/B weekly status report from the Mission Operations Center: DOWNLOAD (pdf)



	    STEREO Weekly Meeting Minutes for 2020-12-01 (Week 49)
 
ANNOUNCEMENTS
-------------
 
* None.
 
 
INSTRUMENT and SPACECRAFT STATUS
--------------------------------
 
* Ahead is operating nominally.  PLASTIC is in operational mode, but with a
  high background rate.
 
* Four years after the initial loss of communications anomaly with the Behind
  observatory, NASA has directed to cease periodic recovery operations with the
  last support on October 17, 2018.
 
 
DISCUSSION AND OPERATIONS CONSTRAINTS
-------------------------------------
 
Week 48 (Nov 23-29)

* On day 329 (Nov 24), during the DSS-35 support for Ahead, turbo decoder lock
  was lost briefly at 0538z.  This anomaly resulted in the loss of three frames
  of SSR data.

* On day 330 (Nov 25), during the DSS-14 support for Ahead, the uplink
  activities were ten minutes late at 0115z due to a sub-reflector problem.
  This anomaly resulted in the loss of 0.2 hours of real-time commanding and
  2-way tracking data, and 10767 frames of SSR data.  MOPs repositioned the SSR
  pointers during the track and recovered all the affected data.  See DR
  #G121518 for more information.

* On day 333 (Nov 28), DSS-54 successfully conducted a Return-To-Service (RTS)
  engineering demo track with Ahead.  The purpose was to validate X-band
  tracking performance after the completion of the Depot Level Maintenance.
  The MOC successfully received real-time telemetry and sent four commands.

* As of day 334 (Nov 29), all PLASTIC systems on Ahead are behaving well,
  except there is a high background count rate, which the team is continuing to
  monitor.

* The average daily science data return for Ahead was 6.1 Gbits during this
  week.

Week 49 (Nov 30-Dec 6)

* Ahead has ten passes during the week, and overall coverage is nominal.  There
  are eight passes at 720 kbps, one at 480 kbps, and one at 360 kbps.

Week 50 (Dec 7-13)

* Ahead has eleven passes during the week, and overall coverage is nominal.
  There are eight passes at 720 kbps, and three at 480 kbps.

* An ESA Cebreros pass is scheduled for Monday, Dec 7, 14:10-16:10.  The rate
  for this pass has been increased to 480 kbps, which will the default for the
  ESA stations from now on.

* The 133rd momentum dump is scheduled for Wednesday, Dec 9, with ignition at
  19:00 UT.

Week 51 (Dec 14-20)

* Ahead has ten passes during the week, and overall coverage is nominal.  There
  are eight passes at 720 kbps, and two at 480 kbps.

Week 52 (Dec 21-27)

* Ahead has eleven passes during the week, all at 720 kbps, and overall
  coverage is nominal.

* The 56th SECCHI stepped calibration roll is scheduled for Monday, Dec 21,
  starting at 13:30 UT.  This is the midpoint roll.

* APL will be closed for a half day on Christmas Eve, Dec 24, and will be
  closed all day on Friday, Dec 25, for Christmas.

Week 53 (Dec 28-Jan 3)

* Ahead has thirteen passes during the week, and overall coverage is nominal.
  There are eleven passes at 720 kbps, and two at 480 kbps.

* APL will be closed for a half day on New Year's Eve, Dec 31, and will be
  closed all day on Friday, Jan 1, for the New Year's holiday.

Week 01 (Jan 4-10)

* Ahead has ten tracks during the week, and overall coverage is nominal.  There
  are five tracks at 720 kbps, four at 480 kbps, and one at 360 kbps.  An ESA
  Cebreros pass is scheduled for Thursday, Jan 7, and an ESA New Norcia track
  is scheduled for Saturday, Jan 9.


COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
Scheduled activities for Week 49:

M Nov 30 (335)  
T Dec 01 (336)  
W Dec 02 (337)  
T Dec 03 (338)  
F Dec 04 (339)  
S Dec 05 (340)  
S Dec 06 (341)  

-------------------------------------------------------------------------------
Scheduled activities for Week 50:

M Dec 07 (342)  
T Dec 08 (343)  
W Dec 09 (344)  
T Dec 10 (345)  
F Dec 11 (346)  
S Dec 12 (347)  
S Dec 13 (348)  

-------------------------------------------------------------------------------
Scheduled activities for Week 51:

M Dec 14 (349)  
T Dec 15 (350)  
W Dec 16 (351)  
T Dec 17 (352)  
F Dec 18 (353)  
S Dec 19 (354)  
S Dec 20 (355)  

-------------------------------------------------------------------------------
Scheduled activities for Week 52:

M Dec 21 (356)  Ahead: SECCHI stepped calibration roll, 13:30 UT
T Dec 22 (357)  
W Dec 23 (358)  
T Dec 24 (359)  
F Dec 25 (360)  Christmas
S Dec 26 (361)  
S Dec 27 (362)  

-------------------------------------------------------------------------------
Scheduled activities for Week 53:

M Dec 28 (363)  
T Dec 29 (364)  
W Dec 30 (365)  
T Dec 31 (366)  
F Jan 01 (001)  New Year
S Jan 02 (002)  
S Jan 03 (003)  

-------------------------------------------------------------------------------
Scheduled activities for Week 01:

M Jan 04 (004)  
T Jan 05 (005)  
W Jan 06 (006)  
T Jan 07 (007)  
F Jan 08 (008)  
S Jan 09 (009)  
S Jan 10 (010)  

-------------------------------------------------------------------------------


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2021:

* Jan 13-23		Parker Solar Probe perihelion pass
* Feb 1-19		Solar Orbiter Remote Sensor Synoptics
* Feb 20		Parker Solar Probe Venus flyby
* Feb 20-25		Solar Orbiter Remote Sensor Checkout Window 2
* Mar 21-24		Solar Orbiter Remote Sensor Checkout Window 3
* Apr 21-28		Solar Orbiter Remote Sensor Synoptics
* Apr 25-May 4		Parker Solar Probe perihelion pass
* May 13-Jul 15		Betelgeuse visible in SECCHI HI2 with 180 degree roll
* Aug 5-15		Parker Solar Probe perihelion pass
* Oct 16		Parker Solar Probe Venus flyby
* Nov 17-26		Parker Solar Probe perihelion pass

2022:

* Feb 21-Mar 2		Parker Solar Probe perihelion pass
* May 28-Jun 7		Parker Solar Probe perihelion pass
* Sep 2-11		Parker Solar Probe perihelion pass
* Dec 7-16		Parker Solar Probe perihelion pass

2023:

* Mar 13-23		Parker Solar Probe perihelion pass
* May 5			Behind: Mercury transit
* Jun 17-27		Parker Solar Probe perihelion pass
* Jul 17		Behind: Closest approach to Earth
* Aug 13		Ahead: Closest approach to Earth
* Aug 21		Parker Solar Probe Venus flyby
* Sep 23-Oct 3		Parker Solar Probe perihelion pass
* Dec 25-Jan 3		Parker Solar Probe perihelion pass

2024:

* Mar 26-Apr 4		Parker Solar Probe perihelion pass
* Jun 26-Jul 5		Parker Solar Probe perihelion pass
* Sep 26-Oct 5		Parker Solar Probe perihelion pass
* Nov 6			Parker Solar Probe Venus flyby, in HI2-A field-of-view
* Dec 20-29		Parker Solar Probe perihelion pass

2025:

* Mar 19-27		Parker Solar Probe perihelion pass
* Apr 7			Ahead: Mercury transit
* Jun 15-24		Parker Solar Probe perihelion pass

2026:

2027:

* Feb 1			Behind: Mercury transit

2028:

2029:

* Jun 30		Ahead: Mercury transit


Courtesy of STEREO/SECCHI consortium.
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