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SFI: 71= | Ap index:  5  | Kp index:  0  ( n\a @--:--,  n\a @--:--)| X-ray flux:  A7.8 
SW: Density= 10.4 p/cm3 | Speed= 319.8 km/s | Temp=30(x1000)K
IMF: Bx=-2.9nT | By=-0.1nT | Bz= -0.8 nT | Bt= 3.0 nT | Lat= -15.8 ° | Lon=182.0°
Sunspots: 0 | Area: 0 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=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 2020-01-21 (Week 4)
 
ANNOUNCEMENTS
-------------

* None.


INSTRUMENT and SPACECRAFT STATUS
--------------------------------
 
* Ahead is operating nominally.  PLASTIC is in the process of returning to
  nominal operations after suffering a voltage anomaly on Dec 5.  See more
  information below.

* 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 03 (Jan 13-19)

* On day 016 (Jan 16), during the DSS-34 support for Ahead, command and
  telemetry binds were lost at BOT, 0805z, due to scheduled JPL network
  maintenance.  Telemetry binds were re-established after a data control reset
  was performed at 1009z.  This anomaly resulted in the loss of 2.1 hours of
  real-time telemetry and commanding.  All SSR data was recovered.  See DR#
  N111323 for more information.

* On days 013, 015, and 017, (Jan 13, 15, 17), the PLASTIC team continued to
  step the Post Acceleration (PAC) power supply high voltage.  All PLASTIC
  systems are behaving well, except there is a high background count rate,
  which the PLASTIC team is continuing to monitor.

* On day 014 (Jan 14), the 51st SECCHI stepped calibration was executed at
  1300z for midpoint in the Ahead orbit.  This was the 20th SECCHI stepped
  calibration roll conducted without gyro use.

* On day 016 (Jan 16), the 125th momentum dump was executed successfully at
  1930z, which imparted an estimated delta V of 0.127 m/sec.  This was the 44th
  momentum dump conducted without gyro use.  After thruster operations
  completed, there was a 0.55 degree of roll angle error.  Fine pointing
  stabilized 2.7 minutes after completion of the momentum dump.

* The average daily science data return for Ahead was 6.9 Gbits during this
  week.

* The SECCHI/COR1 team requested that another stepped calibration roll be
  scheduled, because a new particle landed on the COR1 objective lens just
  hours after the end of the stepped calibration roll on Jan 14.  An additional
  stepped calibration roll has been scheduled for Feb 11, starting at 12:00 UT.

Week 04 (Jan 20-26)

* 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.

* SECCHI will be running a COR2 deep field campaign with Parker Solar Probe,
  Jan 21-23.

* The Parker Solar Probe perihelion pass is from Jan 24 to Feb 4.

Week 05 (Jan 24-Feb 2)

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

* The Parker Solar Probe perihelion pass is from Jan 24 to Feb 4.

Week 06 (Feb 3-9)

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

* The Parker Solar Probe perihelion pass is from Jan 24 to Feb 4.

Week 07 (Feb 10-16)

* Ahead has twelve passes during the week, and overall coverage is nominal.
  There are ten passes at 720 kbps, one at 360 kbps, and one at 160 kbps.

Week 08 (Feb 17-23)

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

Week 09 (Feb 24-Mar 1)

* The 126th momentum dump is scheduled for Wednesday, Feb 26, with ignition at
  19:30 UT.

* Ahead has eleven passes during the week, and overall coverage is nominal.
  There are 10 passes at 720 kbps, and one at 360 kbps.


COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
Scheduled activities for Week 04:

M Jan 20 (020)  
T Jan 21 (021)  Ahead: COR2 deep field campaign with Parker Solar Probe
W Jan 22 (022)  Ahead: COR2 deep field campaign with Parker Solar Probe
T Jan 23 (023)  Ahead: COR2 deep field campaign with Parker Solar Probe
F Jan 24 (024)  Start of Parker Solar Probe perihelion pass
S Jan 25 (025)  
S Jan 26 (026)

Notes:

* PLASTIC in the process of being recovered to normal operations after power
  cycling.

* Parker Solar Probe perihelion pass, Jan 24-Feb 4.

-------------------------------------------------------------------------------
Scheduled activities for Week 05:

M Jan 27 (027)  
T Jan 28 (028)  
W Jan 29 (029)  
T Jan 30 (030)  
F Jan 31 (031)  
S Feb 01 (032)  
S Feb 02 (033)  

Notes:

* Parker Solar Probe perihelion pass, Jan 24-Feb 4.

-------------------------------------------------------------------------------
Scheduled activities for Week 06:

M Feb 03 (034)  
T Feb 04 (035)  End of Parker Solar Probe perihelion pass.
W Feb 05 (036)  
T Feb 06 (037)  
F Feb 07 (038)  
S Feb 08 (039)  
S Feb 09 (040)  

Notes:

* Parker Solar Probe perihelion pass, Jan 24-Feb 4.

-------------------------------------------------------------------------------
Scheduled activities for Week 07:

M Feb 10 (041)  
T Feb 11 (042)  Ahead: SECCHI stepped calibration roll, 12:00
W Feb 12 (043)  
T Feb 13 (044)  
F Feb 14 (045)  
S Feb 15 (046)  
S Feb 16 (047)  

-------------------------------------------------------------------------------
Scheduled activities for Week 08:

M Feb 17 (048)  
T Feb 18 (049)  
W Feb 19 (050)  
T Feb 20 (051)  
F Feb 21 (052)  
S Feb 22 (053)  
S Feb 23 (054)  

-------------------------------------------------------------------------------
Scheduled activities for Week 09:

M Feb 24 (055)  
T Feb 25 (056)  
W Feb 26 (057)  Ahead: Momentum dump, 19:30 UT
T Feb 27 (058)  
F Feb 28 (059)  
S Feb 29 (060)  
S Mar 01 (061)  

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


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2020:

* Apr 27-May 3		Solar Orbiter along Sun-Earth line (TBC after launch)
* May			Behind: Switch downlink rate to 360 kbps for 34 meter
* Jun			Ahead: Switch downlink rate to 360 kbps for 34 meter
* Jun			Behind: Switch downlink rate to 480 kbps for 34 meter
* Jun 2-13		Parker Solar Probe perihelion pass
* Jul 11		Parker Solar Probe Venus flyby, in HI2-A field-of-view
* Sep			Ahead: Switch downlink rate to 480 kbps for 34 meter
* 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
* Jul			Behind: Switch downlink rate to 720 kbps for 34 meter
* Aug			Ahead: Switch downlink rate to 720 kbps for 34 meter
* 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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