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19:20 UTC
SFI: 69 | Ap index:  6  | Kp index:  0  ( n\a @--:--,  n\a @--:--)| X-ray flux:  A6.8 
SW: Density= 1.1 p/cm3 | Speed= 385.0 km/s | Temp=108(x1000)K
IMF: Bx=-4.1nT | By=0.5nT | Bz= 2.3 nT | Bt= 4.7 nT | Lat= 29.7 ° | Lon=173.2°
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)
Downlink from STEREO Behind has been detected during the recovery track on August 21st 2016. More info | All news.



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 2019-05-14 (Week 20)
 
ANNOUNCEMENTS
-------------
 
* The SSC reports that all ftp servers at NASA will have to be shut down by
  July 31.  Instrument teams that get their data via ftp from the stereoftp
  server will have to change their scripts to get the data from
  https://stereo-ssc.nascom.nasa.gov.  A new procedure for updating SolarSoft
  is still under development.  The possibility of modifying the commonly used
  Perl mirror script to use ftps instead of ftp was found to be not feasible.
  The sftp protocol is still allowed by NASA, but this requires each user to
  have an account.  It should also be possible to set up an ftps server, and
  the SSC would like to know whether anyone has a desire to use this protocol.
 
 
INSTRUMENT and SPACECRAFT STATUS
--------------------------------
 
* Ahead is operating nominally.
 
* 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 19 (May 6-12)
 
* MOCs will transition to new command and control work stations using SOE v4 on
  May 22.  Maintain one of the workstations through Jun 21.
 
* Ahead is operating nominally with average science daily return of 6.2 Gbits
  during the week
 
* Ahead has eleven passes during the week, and overall coverage is nominal.
  There are ten passes at 720 kbps, and one at 360 kbps.
 
* On day 125 (May 5), during the DSS-14 support for Ahead.....
 
Week 20 (May 13-19)
 
* Restricted I/O net Nanscom scans at 1407 UT on May 15 (quarterly scans)
 
* Ahead has ten passes during the week, all at 720 kbps, and overall coverage
  is nominal.
 
Week 21 (May 20-26)
 
* The 119th momentum dump on Ahead is scheduled for Tuesday, May 21, with
  ignition at 19:30 UT.  This will be the 38th dump without using the gyros.
 
* Wednesday, May 22, is the target date for switching to the new workstations
  (one primary and one recovery) to begin using SLE version 4. The first
  support is planned for that evening, moving into the next UTC day.
 
* Ahead has twelve passes during the week, and overall coverage is nominal.
  There are nine passes at 720 kbps, one at 360 kbps, and two at 240 kbps.
 
Week 22 (May 27-Jun 2)
 
* Monday, May 27, is Memorial Day, which is an APL holiday.
 
* Saturday, Jun 21, for 2.5 hrs there will be a project interface test for
  downlink tracking and telemetry (software v13.3) at DSN (no instrument
  commanding and no SSR playback as the data is not committed.)
 
* Ahead has ten passes during the week, and overall coverage is nominal.  There
  are eight passes at 720 kbps, one at 360 kbps, and one at 240 kbps.
 
Week 23 (Jun 3-9)
 
* Thursday, Jun 6, Telemetry, tracking and commanding software V1.6
  demonstration track for 1.1 hrs (no instrument commanding and no SSR playback
  as the data is not committed.)
 
* Ahead has ten passes during the week, all at 720 kbps, and overall coverage
  is nominal.
 
Week 24 (Jun 10-16)
 
* Ahead has eight passes during the week, and overall coverage is nominal.
  There are seven passes at 720 kbps, and one at 240 kbps.
 
Week 25 (Jun 17-23)
 
* Wed, Jun 19th, there will be a project interface test of the three links per
  operator concept of operations at the DSN (no instrument commanding and no
  SSR playback as the data is not committed.)
 
* Ahead has ten passes during the week, and overall coverage is nominal.  There
  are seven passes at 720 kbps, and one at 360 kbps, one at 240 kbps, and one
  at 160 kbps.
 
Week 26 (Jun 24-30)
 
* Ahead has eleven passes during the week, and overall coverage is nominal.
  There are nine passes at 720 kbps, and two at 240 kbps.
 
 
COORDINATED OBSERVATIONS
 
-------------------------------------------------------------------------------
Scheduled activities for Week 20:
 
M May 13 (133) 
T May 14 (134) 
W May 15 (135) 
T May 16 (136) 
F May 17 (137) 
S May 18 (138) 
S May 19 (139) 
 
-------------------------------------------------------------------------------
Scheduled activities for Week 21:
 
M May 20 (140) 
T May 21 (141)  Ahead: Momentum dump, 19:30 UT
W May 22 (142) 
T May 23 (143) 
F May 24 (144) 
S May 25 (145) 
S May 26 (146) 
 
-------------------------------------------------------------------------------
Scheduled activities for Week 22:
 
M May 27 (147)  Memorial Day
T May 28 (148) 
W May 29 (149) 
T May 30 (150) 
F May 31 (151) 
S Jun 01 (152) 
S Jun 02 (153) 
 
-------------------------------------------------------------------------------
Scheduled activities for Week 23:
 
M Jun 03 (154) 
T Jun 04 (155) 
W Jun 05 (156) 
T Jun 06 (157) 
F Jun 07 (158) 
S Jun 08 (159) 
S Jun 09 (160) 
 
-------------------------------------------------------------------------------
Scheduled activities for Week 24:
 
M Jun 10 (161) 
T Jun 11 (162) 
W Jun 12 (163) 
T Jun 13 (164) 
F Jun 14 (165) 
S Jun 15 (166) 
S Jun 16 (167) 
 
-------------------------------------------------------------------------------
Scheduled activities for Week 25:
 
M Jun 17 (168) 
T Jun 18 (169) 
W Jun 19 (170) 
T Jun 20 (171) 
F Jun 21 (172) 
S Jun 22 (173) 
S Jun 23 (174) 
 
-------------------------------------------------------------------------------
 
Upcoming events:
 
Behind events are contingent on recovering the spacecraft.
 
2019:
 
* Aug 28-Sep 7                  Parker Solar Probe perihelion pass
* Nov 4                              Ahead: Close approach of Parker Solar Probe
* Dec 26                            Parker Solar Probe Venus flyby
 
2020:
 
* Jan 24-Feb 4                  Parker Solar Probe perihelion pass
* 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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