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SFI: 70= | Ap index:  7  | Kp index:  2  ( n\a @--:--,  n\a @--:--)| X-ray flux:  n\a 
SW: Density= 0.7 p/cm3 | Speed= 427.2 km/s | Temp=99(x1000)K
IMF: Bx=-4.9nT | By=2.7nT | Bz= 3.7 nT | Bt= 6.7 nT | Lat= 33.5 ° | Lon=151.2°
Sunspots: 12 | 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 2020-03-31 (Week 14)
 
ANNOUNCEMENTS
-------------
 
* None.
 
 
INSTRUMENT and SPACECRAFT STATUS
--------------------------------
 
* Ahead is operating nominally.  PLASTIC is back to operational mode, but with
  a higher background rate.  Modifications are still needed to allow PLASTIC
  data to appear in the SSC beacon plots.
 
* 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 13 (Mar 23-29)

* On day 083 (Mar 23), during the DSS-63 support for Ahead, turbo decoder lock
  was lost intermittently from 2114z through 2115z.  This anomaly resulted in
  the loss of 25 frames of SSR data.

* On day 085 (Mar 25), during the DSS-63 support for Ahead, turbo decoder lock
  was lost briefly at 1932z.  This anomaly resulted in the loss of nine frames
  of SSR data.

* On day 087 (Mar 27), during the DSS-14 support for Ahead, the antenna was
  declared red due to an Antenna Servo Drive failure.  This anomaly resulted in
  the loss of 2.2 hours of real-time telemetry, command and tracking data.  On
  the subsequent DSS-63 support, MOPs repositioned the SSR pointers and all
  affected DSS-14 SSR data was recovered.  See DR #G120999 for more
  information.

* On day 087 (Mar 27), during the DSS-63 support for Ahead, turbo decoder lock
  was lost briefly at 1549z.  This anomaly resulted in the loss of two frames
  of SSR data.

* On day 088 (Mar 28), during the DSS-14 support for Ahead, the downlink was
  lost between 0412z and 0429z when the antenna was halted inadvertently.  This
  anomaly resulted in the loss of 30 minutes of real-time telemetry, command,
  tracking, and SSR data.  On the subsequent DSS-55 support, MOPs repositioned
  the SSR pointers and all affected DSS-14 SSR data was recovered.  See DR
  #C114915 for more information.

* On day 089 (Mar 29), during the DSS-63 support for Ahead, turbo decoder lock
  was lost briefly at 1253z.  This anomaly resulted in the loss of 69 frames of
  SSR data.  See DR #M112130 for more information.

* As of day 089 (Mar 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 7.4 Gbits during this
  week.

Week 14 (Mar 30-Apr 5)

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

* The station 63 transmitter is currently red.  As a result, this afternoon's
  (Mar 31) pass will be downlink only.  The station 63 pass on Wednesday
  (Apr 1) may also be downlink only.  The current estimate for when the station
  63 transmitter will be operational again is day 93 (Apr 2), at 15:13 UT.
  Commanding should be possible on an upcoming station 35 pass.

Week 15 (Apr 6-12)

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

* The 127th momentum dump on Ahead is scheduled for Wednesday, Apr 8, at
  21:45 UT.

Week 16 (Apr 13-19)

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

* The battery maintenance activity originally scheduled for Monday, Apr 13, has
  been postponed until the current coronavirus situation is resolved, since it
  requires staffing on-site.

Week 17 (Apr 20-26)

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

* The 53rd SECCHI stepped calibration roll is scheduled for Wednesday, Apr 22,
  starting at 13:50 UT.  This is the aphelion roll.  There is no need to
  postpone this activity because of the coronavirus.

Week 18 (Apr 27-May 3)

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

* Solar Orbiter will be along the Sun-Earth line between Apr 27 to May 3.  The
  SECCHI team has requested that spacecraft operations be avoided during this
  period.  Solar Orbiter resumed commissioning activities on Monday, Mar 30.
  There may have been enough slack in the original schedule to absorb most of
  the 10 day delay caused by the coronavirus situation.

Week 19 (May 4-10)

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


COORDINATED OBSERVATIONS

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

M Mar 30 (090)  
T Mar 31 (091)  
W Apr 01 (092)  
T Apr 02 (093)  
F Apr 03 (094)  
S Apr 04 (095)  
S Apr 05 (096)  

-------------------------------------------------------------------------------
Scheduled activities for Week 15:

M Apr 06 (097)  
T Apr 07 (098)  
W Apr 08 (099)  Ahead: Momentum dump, 21:45 UT
T Apr 09 (100)  
F Apr 10 (101)  
S Apr 11 (102)  
S Apr 12 (103)  

-------------------------------------------------------------------------------
Scheduled activities for Week 16:

M Apr 13 (104)  
T Apr 14 (105)  
W Apr 15 (106)  
T Apr 16 (107)  
F Apr 17 (108)  
S Apr 18 (109)  
S Apr 19 (110)  

-------------------------------------------------------------------------------
Scheduled activities for Week 17:

M Apr 20 (111)  
T Apr 21 (112)  
W Apr 22 (113)  Ahead: SECCHI stepped calibration roll, 13:50 UT
T Apr 23 (114)  
F Apr 24 (115)  
S Apr 25 (116)  
S Apr 26 (117)  

-------------------------------------------------------------------------------
Scheduled activities for Week 18:

M Apr 27 (118)  
T Apr 28 (119)  
W Apr 29 (120)  
T Apr 30 (121)  
F May 01 (122)  
S May 02 (123)  
S May 03 (124)  

Notes:

* Apr 27-May 3		Solar Orbiter along Sun-Earth line

-------------------------------------------------------------------------------
Scheduled activities for Week 19:

M May 04 (125)  
T May 05 (126)  
W May 06 (127)  
T May 07 (128)  
F May 08 (129)  
S May 09 (130)  
S May 10 (131)  

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


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2020:

* 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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