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SFI: 70= | Ap index:  4  | Kp index:  2  ( n\a @--:--,  n\a @--:--)| X-ray flux:  n\a 
SW: Density= 4.6 p/cm3 | Speed= 352.2 km/s | Temp=33(x1000)K
IMF: Bx=-1.0nT | By=-3.5nT | Bz= 2.3 nT | Bt= 4.3 nT | Lat= 32.0 ° | Lon=253.5°
Sunspots: 12 | Area: 70 10-6/Hemi | New regions: 1
[i]X-ray flares: C=0 M=0 X=0 | Optical flares: M1=0 M2=0 M3=0 | Sub-flares=0
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 2020-06-02 (Week 23)
 
ANNOUNCEMENTS
-------------
 
* None.
 
 
INSTRUMENT and SPACECRAFT STATUS
--------------------------------
 
* Ahead is operating nominally.  PLASTIC is back to operational mode, but with
  a higher background rate.  More time is needed to understand the new
  calibraton.
 
* 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 22 (May 25-31)

* On day 146 (May 25), during the DSS-63 support for Ahead, turbo decoder lock
  was lost briefly at 1013z.  This anomaly resulted in the loss of nine frames
  of SSR data.

* As of day 152 (May 31), 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 7.0 Gbits during this
  week.

Week 23 (Jun 1-7)

* Ahead has thirteen passes during the week, and overall coverage is nominal.
  There are seven passes at 720 kbps, one at 480 kbps, and five at 360 kbps.
  The schedule was reorganized because of station 63 maintenance activities.
  The schedule includes an ESA Cebreros pass on Thursday.

* The fifth Parker Solar Probe perihelion pass period is scheduled for days
  154-164 (Jun 2-13).  SECCHI will be supporting this pass, with special EUVI
  and COR2 observations on Jun 4,5, another period of special COR2 observations
  Jun 8-11, and with the regular synoptic program.

Week 24 (Jun 8-14)

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

* The fifth Parker Solar Probe perihelion pass period is scheduled for days
  154-164 (Jun 2-13).  SECCHI will be supporting this pass, with special EUVI
  and COR2 observations on Jun 4,5, another period of special COR2 observations
  Jun 8-11, and with the regular synoptic program.

Week 25 (Jun 15-21)

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

Week 26 (Jun 22-28)

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

Week 27 (Jun 29-Jul 5)

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

* The 129th momentum dump on Ahead is scheduled for Monday, Jun 29, with
  ignition at 15:00.

* Friday, Jul 3, is a holiday at APL, for Independence Day.

Week 28 (Jul 6-12)

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

Other

* The Harvard-Smithsonian Center for Astrophysics has asked whether STEREO can
  observe the star Betelgeuse during the upcoming months, when it is too close
  to the Sun to be observed from Earth.  It's been calculated that Betelgeuse
  can be observed by the HI2-A telescope between June 2 and August 5 if the
  STEREO-A spacecraft is rotated by 180 degrees.  Since SECCHI plans in 2 hour
  blocks, the idea would be to roll the spacecraft at the beginning of a block,
  wait for the pointing to stabilze, take images, and then roll back near the
  end of the block in time to stabilize before the next 2 hour block in the
  normal schedule.  Betelgeuse is very bright, so much shorter exposure times
  than normal would be needed.  The SECCHI team is currently looking into this.


COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
Scheduled activities for Week 23:

M Jun 01 (153)  
T Jun 02 (154)  
W Jun 03 (155)  
T Jun 04 (156)  Ahead: EUVI deep exposure, COR2 pB campaign
F Jun 05 (157)  Ahead: EUVI deep exposure, COR2 pB campaign
S Jun 06 (158)  
S Jun 07 (159)  

Notes:

* Parker Solar Probe perihelion pass, Jun 2-13.

-------------------------------------------------------------------------------
Scheduled activities for Week 24:

M Jun 08 (160)  Ahead: COR2 deep exposure campaign
T Jun 09 (161)  Ahead: COR2 deep exposure campaign
W Jun 10 (162)  Ahead: COR2 deep exposure campaign
T Jun 11 (163)  Ahead: COR2 deep exposure campaign
F Jun 12 (164)  
S Jun 13 (165)  
S Jun 14 (166)  

Notes:

* Parker Solar Probe perihelion pass, Jun 2-13.

-------------------------------------------------------------------------------
Scheduled activities for Week 25:

M Jun 15 (167)  
T Jun 16 (168)  
W Jun 17 (169)  
T Jun 18 (170)  
F Jun 19 (171)  
S Jun 20 (172)  
S Jun 21 (173)  

-------------------------------------------------------------------------------
Scheduled activities for Week 26:

M Jun 22 (174)  
T Jun 23 (175)  
W Jun 24 (176)  
T Jun 25 (177)  
F Jun 26 (178)  
S Jun 27 (179)  
S Jun 28 (180)  

-------------------------------------------------------------------------------
Scheduled activities for Week 27:

M Jun 29 (181)  Ahead: Momentum dump, 15:00 UT
T Jun 30 (182)  
W Jul 01 (183)  
T Jul 02 (184)  
F Jul 03 (185)  Independence Day holiday
S Jul 04 (186)  Independence Day
S Jul 05 (187)  

-------------------------------------------------------------------------------
Scheduled activities for Week 28:

M Jul 06 (188)  
T Jul 07 (189)  
W Jul 08 (190)  
T Jul 09 (191)  
F Jul 10 (192)  
S Jul 11 (193)  
S Jul 12 (194)  

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


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2020:

* Jul 11		Parker Solar Probe Venus flyby, in HI2-A field-of-view
* Sep 22-Oct 2		Parker Solar Probe perihelion pass

2021:

* Jan 13-23		Parker Solar Probe perihelion pass
* Feb 20		Parker Solar Probe Venus flyby
* Apr 25-May 4		Parker Solar Probe perihelion pass
* 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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