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SFI: 66 | Ap index:  9  | Kp index:  2  ( n\a @--:--,  n\a @--:--)| X-ray flux:  A6.2 
SW: Density= 2.8 p/cm3 | Speed= 373.2 km/s | Temp=46(x1000)K
IMF: Bx=-3.2nT | By=0.1nT | Bz= -0.1 nT | Bt= 3.2 nT | Lat= -2.4 ° | Lon=177.5°
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 2019-09-10 (Week 37)

ANNOUNCEMENTS
-------------

* IMPACT announces that the STEREO Data Server at UCLA will be down for a
  month.  Alternate sources for these data are being identified.

* The SSC reports that ftp access via stereoftp has been discontinued, as per
  NASA directive.  An ftps service on stereoftp will be active shortly.
  Otherwise, instrument teams that get their data via ftp from the server will
  have to change their scripts to get the data from
  https://stereo-ssc.nascom.nasa.gov.

* The sohoftp server that distributes SolarSoft is no longer available from
  outside NASA.  Information on how to install and update SolarSoft under the
  new system is available at

                https://stereo-ssc.nascom.nasa.gov/solarsoft_wget.shtml


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 36 (Sep 2-8)

* On day 246 (Sept 3), the SECCHI COR2 Deep Exposure Campaign for the 3rd
  Parker Solar Probe perihelion encounter was completed. This three-day
  campaign began on day 244 (Sept 1).

* The average daily science data return for Ahead was 6.1 Gbits during this
  week.

Week 37 (Sep 9-15)

* On day 253 (Sep 10), during the DSS-34 support for Ahead, turbo decoder lock
  was lost briefly 09:27UT.  This anomaly resulted in the loss of four frames
  of SSR data.


* SECCHI plans to make special HI-1 observations in conjunction with PSP/WISPR,
  Sep 11-13.

* Ahead has nine passes during the week, and overall coverage is nominal. There
  are six passes at 720 kbps, two at 480 kbps, and one at 240 kbps.

Week 38 (Sep 16-22)

* The 122nd momentum dump on Ahead is scheduled for Tuesday, Sep 17, with
  ignition at 16:00 UT.  This will be the 41st momentum dump without using the
  gyros.

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

Week 39 (Sep 23-29)

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

Week 40 (Sep 30-Oct 6)

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

Week 41 (Oct 7-Oct 13)

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

Week 42 (Oct 14-Oct 20)

* Ahead has eight passes during the week, short seven total hours of coverage
  on day 289 (Oct 16) and 290 (Oct 17). ESA has been contacted ESA for
  support. There are six passes at 720 kbps, one at 360 kbps, and one at 160
  kpbs.


COORDINATED OBSERVATIONS

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

M Sep 09 (252)  
T Sep 10 (253)  
W Sep 11 (254)  Ahead: HI1-WISPR campaign
T Sep 12 (255)  Ahead: HI1-WISPR campaign
F Sep 13 (256)  Ahead: HI1-WISPR campaign
S Sep 14 (257)  
S Sep 15 (258)  

-------------------------------------------------------------------------------
Scheduled activities for Week 38:

M Sep 16 (259)  
T Sep 17 (260)  Ahead: Momentum dump, 16:00 UT
W Sep 18 (261)  
T Sep 19 (262)  
F Sep 20 (263)  
S Sep 21 (264)  
S Sep 22 (265)  

-------------------------------------------------------------------------------
Scheduled activities for Week 39:

M Sep 23 (266)  
T Sep 24 (267)  
W Sep 25 (268)  
T Sep 26 (269)  
F Sep 27 (270)  
S Sep 28 (271)  
S Sep 29 (272)  

-------------------------------------------------------------------------------
Scheduled activities for Week 40:

M Sep 30 (273)  
T Oct 01 (274)  
W Oct 02 (275)  
T Oct 03 (276)  
F Oct 04 (277)  
S Oct 05 (278)  
S Oct 06 (279)  

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

Scheduled activities for Week 41:

M Oct 07 (280)  
T Oct 08 (281)  
W Oct 09 (282)  
T Oct 10 (283)  
F Oct 11 (284)  
S Oct 12 (285)  
S Oct 13 (286)
 
-------------------------------------------------------------------------------

Scheduled activities for Week 42:

M Oct 14 (287)  
T Oct 15 (288)  
W Oct 16 (289)  
T Oct 17 (290)  
F Oct 18 (291)  
S Oct 19 (292)  
S Oct 20 (293)


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2019:

* 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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