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SFI: 80 | Ap index:  6  | Kp index:  2  ( n\a @--:--,  n\a @--:--)| X-ray flux:  n\a 
SW: Density= 2.0 p/cm3 | Speed= 455.1 km/s | Temp=156(x1000)K
IMF: Bx=-1.2nT | By=0.7nT | Bz= 0.7 nT | Bt= 1.5 nT | Lat= 27.9 ° | Lon=151.1°
Sunspots: 14 | Area: 10 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 2021-03-02 (Week 9)
 
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 08 (Feb 22-28)

* On day 058 (Feb 27), during the DSS-43 support for Ahead, the transmitter
  tripped off at 0838z.  This anomaly resulted in the loss of 1384 frames of
  SSR data during the downlink receiver transition from 2-way to 1-way mode.
  The MOPs team decided to remain downlink only for the remaining 1.8 hours of
  the support to avoid any further data loss by re-sweeping the uplink.  The
  MOPs team repositioned the SSR pointers on the subsequent DSS-14 support and
  recovered all the affected data.  See DR #C115497 for more information.

* On day 055 (Feb 24), the Ahead star tracker reset at 03:15:46z.  Fault
  protection immediately promoted the star tracker back to AAD mode at
  03:16:11z.  The diagnostic data indicated that the reset cause was due to a
  CPU Error, same as previous resets.  The anomaly resulted in a momentary loss
  of fine pointing with a 0.2 degree of roll angle error.  This was the eighth
  star tracker reset on the Ahead observatory.

* As of day 059 (Feb 28), 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 6.4 Gbits during this
  week.

Week 09 (Mar 1-7)

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

Week 10 (Mar 8-14)

* 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.  An ESA
  New Norcia pass is scheduled for Monday, Mar 8.

* Daily savings time in the US starts on Sunday, Mar 14.

Week 11 (Mar 15-21)

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

* The 57th stepped calibration roll on Ahead is scheduled for Thursday, Mar 18,
  starting at 13:30 UT.

* Solar Orbiter Remote Sensor Checkout Window 3 starts on day 80 (Mar 21), and
  continues through day 83 (Mar 24).

Week 12 (Mar 22-28)

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

* The 10th annual battery discharge maintenance will occur on Wednesday,
  Mar 24, starting at approximately 20:00 UT during a station 63 pass.

Week 13 (Mar 29-Apr 4)

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

* The 136th momentum dump is scheduled for Wednesday, Mar 31, starting at
  16:30 UT.

Week 14 (Apr 5-11)

* AHead has twelve passes during the week, and overall coverage is nominal.
  There are eleven passes at 720 kbps, and one at 480 kbps.


COORDINATED OBSERVATIONS

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

M Mar 01 (060)  
T Mar 02 (061)  
W Mar 03 (062)  
T Mar 04 (063)  
F Mar 05 (064)  
S Mar 06 (065)  
S Mar 07 (066)  

-------------------------------------------------------------------------------
Scheduled activities for Week 10:

M Mar 08 (067)  
T Mar 09 (068)  
W Mar 10 (069)  
T Mar 11 (070)  
F Mar 12 (071)  
S Mar 13 (072)  
S Mar 14 (073)  Start of daylight savings time in US

-------------------------------------------------------------------------------
Scheduled activities for Week 11:

M Mar 15 (074)  
T Mar 16 (075)  
W Mar 17 (076)  
T Mar 18 (077)  Ahead: Stepped calibration roll, 13:30 UT
F Mar 19 (078)  
S Mar 20 (079)  
S Mar 21 (080)  Start of Solar Orbiter Remote Sensor Checkout Window 3

Notes:

* Solar Orbiter Remote Sensor Checkout Window 3, Mar 21-24.

-------------------------------------------------------------------------------
Scheduled activities for Week 12:

M Mar 22 (081)  
T Mar 23 (082)  
W Mar 24 (083)  End of Solar Orbiter Remote Sensor Checkout Window 3
		Ahead: Battery discharge maintenance, 20 UT
T Mar 25 (084)  
F Mar 26 (085)  
S Mar 27 (086)  
S Mar 28 (087)  

Notes:

* Solar Orbiter Remote Sensor Checkout Window 3, Mar 21-24.

-------------------------------------------------------------------------------
Scheduled activities for Week 13:

M Mar 29 (088)  
T Mar 30 (089)  
W Mar 31 (090)  Ahead: Momentum dump, 16:30 UT
T Apr 01 (091)  
F Apr 02 (092)  
S Apr 03 (093)  
S Apr 04 (094)  

-------------------------------------------------------------------------------
Scheduled activities for Week 14:

M Apr 05 (095)  
T Apr 06 (096)  
W Apr 07 (097)  
T Apr 08 (098)  
F Apr 09 (099)  
S Apr 10 (100)  
S Apr 11 (101)  

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


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2021:

* 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 5			Solar Orbiter along Sun-Earth line
* 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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