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10:30 UTCSFI: 71= | Ap index:  3  | Kp index:  1  ( n\a @--:--,  n\a @--:--)| X-ray flux:  A8.7 
SW: Density= 5.7 p/cm3 | Speed= 341.9 km/s | Temp=33(x1000)K
IMF: Bx=5.3nT | By=-4.4nT | Bz= 1.2 nT | Bt= 7.0 nT | Lat= 10.1 ° | Lon=319.9°
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 2020-02-18 (Week 8)
 
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 07 (Feb 10-16)

* On day 045 (Feb 14), the entire DSS-14 track for Ahead was lost because the
  antenna was declared red due to a water leak affecting the cooling of the
  equipment.  This anomaly resulted in the loss of 3.6 hours of real-time
  telemetry, command and tracking data, as well as 24 hours of SECCHI SSR data.
  SSR pointers were repositioned on the subsequent support for all in-situ
  instruments and all missing data was recovered.  The SECCHI SSR pointer was
  not repositioned because ~34 hours had elapse since the last contact and MOps
  could not predict how much data SECCHI had recorded.  For more information,
  see DR #G120889.

* On day 042 (Feb 11), the 52nd SECCHI stepped calibration was executed at
  1200z for midpoint in the Ahead orbit.  This was the 21st SECCHI stepped
  calibration roll conducted without gyro use.  This calibration was a redo in
  response to a new particle on the COR1 objective, which occurred a few hours
  after the previous calibration on Jan 14.

* On day 043 (Feb 12), the PLASTIC team continued to step the Post Acceleration
  (PAC) power supply high voltage.  All PLASTIC systems are behaving well at
  this time.

* On day 046 (Feb 15), the PLASTIC team discovered the solar wind data stopped
  updating and the digital-to-analog converter (DAC) settings reset to zero.
  The team believes that a transient event may have occurred on the instrument,
  which disrupted the DAC board.  The team will be commanding on day 048
  (Feb 17) to investigate this incident.

* The PLASTIC team performed some commanding yesterday, Feb 17.  The DAC high
  voltage was set to zero, and the power supply was disabled.  The HV tables
  were dumped to check for errors.

* The average daily science data return for Ahead was 6.3 Gbits during this
  week.

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.  This will be the 45th momentum dump without using the gyros.
 
* Ahead has eleven passes during the week, and overall coverage is nominal.
  There are 10 passes at 720 kbps, and one at 360 kbps.
 
Week 10 (Mar 2-8)
 
* Daily savings time in the US begins on March 8.
 
* Ahead has fifteen passes during the week, and overall coverage is nominal.
  There are eight passes at 720 kbps, and seven at 360 kbps.  The station 25
  pass on day 65 (Mar 5) was changed to station 14.
 
Week 11 (Mar 9-15)
 
* Ahead has fourteen passes during the week, and overall coverage is nominal.
  There are ten passes at 720 kbps, three at 360 kbps, and one at 240 kbps.

Week 12 (Mar 16-22)

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

* A three links per operator project interface test will be carried out with
  station 63 on Wednesday, Mar 18, 18:35-21:35 UT.  There will be no instrument
  commanding or SSR downlink during this test.

Week 13 (Mar 23-29)

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

Other

* MOC welcomes Cory St. John to the team.
  
 
COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
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)  

Notes:

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

-------------------------------------------------------------------------------
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)  

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

M Mar 02 (062)  
T Mar 03 (063)  
W Mar 04 (064)  
T Mar 05 (065)  
F Mar 06 (066)  
S Mar 07 (067)  
S Mar 08 (068)  Start of daylight savings time in US

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

M Mar 09 (069)  
T Mar 10 (070)  
W Mar 11 (071)  
T Mar 12 (072)  
F Mar 13 (073)  
S Mar 14 (074)  
S Mar 15 (075)  

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

M Mar 16 (076)  
T Mar 17 (077)  
W Mar 18 (078)  
T Mar 19 (079)  
F Mar 20 (080)  
S Mar 21 (081)  
S Mar 22 (082)  

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

M Mar 23 (083)  
T Mar 24 (084)  
W Mar 25 (085)  
T Mar 26 (086)  
F Mar 27 (087)  
S Mar 28 (088)  
S Mar 29 (089)  

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


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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