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SFI: 74 | Ap index:  3  | Kp index:  1  ( n\a @--:--,  n\a @--:--)| X-ray flux:  n\a 
SW: Density= 1.5 p/cm3 | Speed= 313.1 km/s | Temp=69(x1000)K
IMF: Bx=-3.5nT | By=1.2nT | Bz= -0.1 nT | Bt= 3.7 nT | Lat= -2.1 ° | Lon=161.2°
Sunspots: 13 | Area: 30 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 2020-08-04 (Week 32)
 
ANNOUNCEMENTS
-------------
 
* None.
 
 
INSTRUMENT and SPACECRAFT STATUS
--------------------------------
 
* Ahead is operating nominally.  PLASTIC is back to operational mode, but with
  a higher 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 31 (Jul 27-Aug 2)

* On day 210 (Jul 28), during the DSS-14 support for Ahead, turbo decoder lock
  was lost briefly at 2221z.  This anomaly resulted in the loss of one frame of
  SSR data.

* On day 213 (Jul 31), during the DSS-14 support for Ahead, the transmitter was
  unable to support uplink activities due to an issue with the Microwave
  Control Assembly.  This anomaly resulted in the loss of 3.2 hours of
  real-time commanding and 2-way tracking data.  See DR #G121256 for more
  information.

* On day 209 (Jul 27), the SECCHI 180 degree roll was executed successfully on
  Ahead at 0800z for the Fourth Betelgeuse star observation.

* As of day 215 (Aug 2), 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 6.6 Gbits during this
  week.

Week 32 (Aug 3-9)

* Ahead has sixteen passes during the week, and overall coverage is nominal.
  There are eight passes at 720 kbps, two at 480 kbps, and six at 360 kbps.
  The station 14 pass on Sunday, Aug 9, was shortened, and a station 54 pass
  just before that was added to assist another mission.

* An additional 180 degree roll to observe Betelgeuse was carried out
  yesterday, Aug 3, between 16-18 UT, upon request from the Harvard Smithsonian
  Center for Astrophysics.  This was the final roll, as Betelgeuse will no
  longer be observable after Aug 5.

* An ESA New Norcia pass is scheduled for Thursday, Aug 6, 08:30-12:30.

* Maintenance on the main archive RAID at the MOC is scheduled for Thursday,
  Aug 6.  The archive will be rebooted at 15:00 UT.

* A test of the three links per operator link test is scheduled for Friday,
  Aug 7, using station 14.  There will be no instrument commanding or SSR
  downlink during this pass.

Week 33 (Aug 10-16)

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

* The 130th momentum dump on Ahead is scheduled for Tuesday, Aug 11, with
  ignition at 21:00 UT.

* Network maintenance on the restricted IONet is scheduled for 12:30 Thursday,
  Aug 13.  The subsequent station 63 track will be manned.

Week 34 (Aug 17-23)

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

Week 35 (Aug 24-30)

* Ahead has thirteen passes during the week, and overall coverage is nominal.
  There are seven passes at 720 kbps, one at 480 kbps, four at 360 kbps, and
  one at 240 kbps.

Week 36 (Aug 31-Sep 6)

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

Week 37 (Sep 7-13)

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

* Monday, Sep 7, is Labor Day, which is an APL holiday.

* An ESA New Norcia pass is scheduled for Thursday, Sep 10, from 08:05-10:45
  UT.


COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
Scheduled activities for Week 32:

M Aug 03 (216)  Ahead: 180 degree roll for observation of Betelgeuse, 16-18 UT
T Aug 04 (217)  
W Aug 05 (218)  
T Aug 06 (219)  
F Aug 07 (220)  Ahead: 3 links/operator link test with station 14
S Aug 08 (221)  
S Aug 09 (222)  

-------------------------------------------------------------------------------
Scheduled activities for Week 33:

M Aug 10 (223)  
T Aug 11 (224)  Ahead: Momentum dump, 21:00 UT
W Aug 12 (225)  
T Aug 13 (226)  
F Aug 14 (227)  
S Aug 15 (228)  
S Aug 16 (229)  

-------------------------------------------------------------------------------
Scheduled activities for Week 34:

M Aug 17 (230)  
T Aug 18 (231)  
W Aug 19 (232)  
T Aug 20 (233)  
F Aug 21 (234)  
S Aug 22 (235)  
S Aug 23 (236)  

-------------------------------------------------------------------------------
Scheduled activities for Week 35:

M Aug 24 (237)  
T Aug 25 (238)  
W Aug 26 (239)  
T Aug 27 (240)  
F Aug 28 (241)  
S Aug 29 (242)  
S Aug 30 (243)  

-------------------------------------------------------------------------------
Scheduled activities for Week 36:

M Aug 31 (244)  
T Sep 01 (245)  
W Sep 02 (246)  
T Sep 03 (247)  
F Sep 04 (248)  
S Sep 05 (249)  
S Sep 06 (250)  

-------------------------------------------------------------------------------
Scheduled activities for Week 37:

M Sep 07 (251)  Labor Day
T Sep 08 (252)  
W Sep 09 (253)  
T Sep 10 (254)  
F Sep 11 (255)  
S Sep 12 (256)  
S Sep 13 (257)  

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


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2020:

* 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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