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15:35 UTCSFI: 72↑ | Ap index:  9  | Kp index:  2  ( 0 @16:45,  0 @19:45)| X-ray flux:  A4.8 
SW: Density= 2.0 p/cm3 | Speed= 615.4 km/s | Temp=148(x1000)K
IMF: Bx=0.6nT | By=-3.7nT | Bz= -0.9 nT | Bt= 3.8 nT | Lat= -13.1 ° | Lon=279.9°
Sunspots: 12 | Area: 10 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 2018-12-04 (Week 49)

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

* DSN scheduler Jennifer O'Keefe is departing after many years of service to
  the STEREO project.  Her more than capable assistance during the attempts to
  recover Behind are greatly appreciated.


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 48 (Nov 26-Dec 2)

* On day 333 (Nov 29), the third acceptance test of the CCSDS SLE bluebook
  version 4 software update between the Ahead MOC with DTF-21 was conducted.
  SLE telemetry and command binds were successful.  An issue with receiving
  ground system status data and spacecraft telemetry was identified.  Further
  testing will be scheduled.  The next test will be with the ESA New Norcia
  station on Thursday, Dec 6.

* The average daily science data return for Ahead was 5.5 Gbits during this
  week.

Week 49 (Dec 3-9)

* The internet maintenance originally scheduled for Wednesday, Dec 5, has been
  postponed until Monday, Dec 10.
  
* The STEREO Science Center website at stereo-ssc.nascom.nasa.gov will be down
  on Wednesday, Dec 5, to switch over to a new archive server.

* An SLE version 4 test with ESA is scheduled for Thursday, Dec 6.

* Ahead has nine passes during the week, and overall coverage is nominal.
  There are four passes at 720 kbps, three at 360 kbps, and two at 240 kbps.

Week 50 (Dec 10-16)

* External connectivity to the STEREO MOC, for instrument commanding, real-time
  telemetry, and data products, will be unavailable on Monday, December 10th,
  for a 30 minute period between 6 PM through 7:25 PM ET (DOY 344 2300-0025z)
  due to an APL Internet upgrade.  For those that stay connected to the MOC,
  they must reconnect afterwards.

* Ahead has eleven passes during the week, and overall coverage is nominal.
  There are seven passes at 720 kbps, one at 360 kbps, two at 240 kbps, and one
  at 160 kbps, including an ESA New Norcia pass on Thursday, Dec 13.

Week 51 (Dec 17-23)

* The 115th momentum dump on Ahead is scheduled for Wednesday, Dec 19, with
  ignition at 17:00 UT.  This will be the 34th dump without using the gyros.
  This dump will be occuring during an ESA Cebreros pass.

* Ahead has fourteen passes during the week, and overall coverage is nominal.
  There are five passes at 720 kbps, three at 360 kbps, two at 240 kbps, and
  four at 160 kbps, including two ESA Cebreros passes.

Week 52 (Dec 24-30)

* Tuesday, Dec 25, is Christmas.  Monday, Dec 24 is also a holiday for APL.  

* Ahead has twelve passes during the week, and overall coverage is nominal.
  There are six passes at 720 kbps, two at 360 kbps, one at 240 kbps, and three
  at 160 kbps.

Week 1 (Dec 31-Jan 6)

* Tuesday, Jan 1, is the New Year's Day holiday.  Monday, Dec 31 is also a
  holiday at APL.

* On Thursday, Jan 3, the Ahead spacecraft resumes emergency rates of 120 bps
  upload and 633 bps download, using the LGA with a 70 meter station.

* Ahead has eleven passes during the week, and overall coverage is nominal.
  There are eight passes at 720 kbps, two at 360 kbps, and one at 160 kbps.

Week 2 (Jan 7-13)

* Ahead has nine passes during the week, and overall coverage is nominal.
  There are six passes at 720 kbps, two at 360 kbps, and one at 240 kbps.

Week 3 (Jan 14-20)

* Ahead has twelve passes during the week, and overall coverage is nominal.
  There are nine passes at 720 kbps, two at 360 kbps, and one at 240 kbps.


COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
Scheduled activities for Week 49:

M Dec 03 (337)  
T Dec 04 (338)  
W Dec 05 (339)  
T Dec 06 (340)  
F Dec 07 (341)  
S Dec 08 (342)  
S Dec 09 (343)  

-------------------------------------------------------------------------------
Scheduled activities for Week 50:

M Dec 10 (344)  
T Dec 11 (345)  
W Dec 12 (346)  
T Dec 13 (347)  
F Dec 14 (348)  
S Dec 15 (349)  
S Dec 16 (350)  

-------------------------------------------------------------------------------
Scheduled activities for Week 51:

M Dec 17 (351)  
T Dec 18 (352)  
W Dec 19 (353)  Ahead:	Momentum dump, 17:00 UT
T Dec 20 (354)  
F Dec 21 (355)  
S Dec 22 (356)  
S Dec 23 (357)  

-------------------------------------------------------------------------------
Scheduled activities for Week 52:

M Dec 24 (358)  Christmas Eve (APL holiday)
T Dec 25 (359)  Christmas
W Dec 26 (360)  
T Dec 27 (361)  
F Dec 28 (362)  
S Dec 29 (363)  
S Dec 30 (364)  

-------------------------------------------------------------------------------
Scheduled activities for Week 01:

M Dec 31 (365)  New Year's Eve (APL holiday)
T Jan 01 (001)  New Year's Day
W Jan 02 (002)  
T Jan 03 (003)  
F Jan 04 (004)  
S Jan 05 (005)  
S Jan 06 (006)  

-------------------------------------------------------------------------------
Scheduled activities for Week 02:

M Jan 07 (007)  
T Jan 08 (008)  
W Jan 09 (009)  
T Jan 10 (010)  
F Jan 11 (011)  
S Jan 12 (012)  
S Jan 13 (013)  

-------------------------------------------------------------------------------
Scheduled activities for Week 03:

M Jan 14 (014)  
T Jan 15 (015)  
W Jan 16 (016)  
T Jan 17 (017)  
F Jan 18 (018)  
S Jan 19 (019)  
S Jan 20 (020)  

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


Upcoming events:

Behind events are contingent on recovering the spacecraft.

2019:

* Mar			Ahead:	Switch downlink rate to 240 kbps for 34 meter
* Mar 31-Apr 10		Parker Solar Probe perihelion pass
* Apr			Behind:	Switch downlink rate to 240 kbps for 34 meter
* Aug 28-Sep 7		Parker Solar Probe perihelion pass
* Nov 4			Ahead:	Close approach of Parker Solar Probe

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
* 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
* 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
* 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
* 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
* 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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