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23:25 UTC
SFI: 67= | Ap index:  4  | Kp index:  1  ( n\a @--:--,  n\a @--:--)| X-ray flux:  A6.3 
SW: Density= 1.2 p/cm3 | Speed= 329.9 km/s | Temp=16(x1000)K
IMF: Bx=-1.9nT | By=-2.3nT | Bz= -0.2 nT | Bt= 3.0 nT | Lat= -4.5 ° | Lon=230.5°
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)
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 2019-07-16 (Week 29)
 
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 in beta testing.
 
 
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 28 (Jul 8-14)

* On day 190 (Tuesday July 9), during the DSS-34 support, turbo
	decoder lock was lost briefly at 0905z.  This anomaly resulted
	in the loss of two frames of SSR data.   

* On day 193 (Friday July 12), during the DSS-14 support, turbo
 	decoder lock was lost intermittently at 0301z and 0322z.  This
 	anomaly resulted in the loss of 15 frames of SSR data. 

* On day 195 (Sunday, July 14), during the DSS-14 support, turbo decoder
	lock was lost intermittently at 0229z and 0252z.  This anomaly
	resulted in the loss of 161 frames of SSR data.  See DR# G120357 for
	more information. 
	
*  The Chandrayaan-2 launch, originally scheduled for Sunday July 14, postponed. 
    Possible new launch dates maybe  July 19-23 or July 24-30 but nothing 
    has been announced.

* The average daily science data return for Ahead was 6.5 Gbits during this week.

Week 29 (Jul 15-21)
   
* STEREO will retain the Station 36 coverage on Thursday July 18. 
   That might have been canceled if Chandrayaan-2 had launched
   this week, but now that is not the case.

* Ahead has ten passes during the week, and overall coverage is nominal.
  There are five passes at 720 kbps, four at 360 kbps, and one at 240 kbps.

Week 30 (Jul 22-28)

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

Week 31 (Jul 29-Aug 4)

* The 49th SECCHI stepped calibration roll is scheduled for Monday, Jul 29,
  starting at 12:10 UTC.  This is the midpoint roll.  System momentum is
  expected to be 7 N-m-s.  This will be the 18th calibration roll without using
  the gyros.
  
* The monthly NASCOM IONET scan is Thursday Aug 1, 14:00-15:00 UTC.

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

Week 32 (Aug 5-11)

* The 121st momentum dump on Ahead is scheduled for Monday, Aug 5, with
  ignition at 20:30 UT.  This will be the 40th momentum dump without using the
  gyros.

* On Tuesday, Aug 6, the data rates for the low gain antenna on Ahead will
  increase to 500 bps for uplink, and 1000 bps for downlink, when using a 70
  meter station. Ignition at 21:30 UT.

* 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 33 (Aug 12-18)
  
* Late on Tuesday Aug 13 there will be a project interface test of
  software and procedures for three links per operator at the DSN. No
  SSR playback or instrument commanding during the test. This will 
  occur on a DSS-14 track, 21:15 -00:15 UTC.
   
* Ahead has eleven passes during the week, and overall coverage in nominal. 
  There are seven passes at 720 kbps and four at 240 kbps.
    
Week 34  (Aug 19-25)

* On Tuesday Aug 20 there will be a return-to-service demo
	track with DSS-63, 16:50-19:50 UTC. There will be no SSR
	playback and no instrument commanding.

* Ahead has twelve passes during the week, and overall coverage in nominal. 
    There are nine passes at 720 kbps, two at 360 kbps and one at 240 kbps.
      
Week 35 (Aug 26-Sept 1)
 
* The 3rd SECCHI Cor 2 deep exposure campaign starts Wednesday Aug
	28 and extends to Sep 7.
 
*  Ahead has twelve passes during the week, and overall coverage in nominal. 
    There are ten passes at 720 kbps and two at 360 kbps.
    
COORDINATED OBSERVATIONS

-------------------------------------------------------------------------------
Scheduled activities for Week 29:

M Jul 15 (196)  
T Jul 16 (197)  
W Jul 17 (198)  
T Jul 18 (199)  
F Jul 19 (200)  
S Jul 20 (201)  
S Jul 21 (202)  

-------------------------------------------------------------------------------
Scheduled activities for Week 30:

M Jul 22 (203)  
T Jul 23 (204)  
W Jul 24 (205)  
T Jul 25 (206)  
F Jul 26 (207)  
S Jul 27 (208)  
S Jul 28 (209)  

-------------------------------------------------------------------------------
Scheduled activities for Week 31:

M Jul 29 (210)  Ahead: SECCHI stepped calibration roll, 12:10 UT
T Jul 30 (211)  
W Jul 31 (212)  
T Aug 01 (213)  
F Aug 02 (214)  
S Aug 03 (215)  
S Aug 04 (216)  

-------------------------------------------------------------------------------
Scheduled activities for Week 32:

M Aug 05 (217)  Ahead: Momentum dump, 20:30 UT
T Aug 06 (218)  
W Aug 07 (219)  
T Aug 08 (220)  
F Aug 09 (221)  
S Aug 10 (222)  
S Aug 11 (223)  

-------------------------------------------------------------------------------
Scheduled activities for Week 33:

M Aug 12 (224)  
T Aug 13 (225)  
W Aug 14 (226)  
T Aug 15 (227)  
F Aug 16 (228)  
S Aug 17 (229)  
S Aug 18 (230)  
-------------------------------------------------------------------------------
Scheduled activities for Week 34:

M Aug 19 (231)  
T Aug 20 (232)  
W Aug 21 (233)  
T Aug 22 (234)  
F Aug 23 (235)  
S Aug 24 (236)  
S Aug 25 (237)  
-------------------------------------------------------------------------------
Scheduled activities for Week 35:

M Aug 26 (238)  
T Aug 27 (239)  
W Aug 28 (240)   3rd SECCHI Cor 2 deep exposure campaign starts
T Aug 29 (241)  
F Aug 30 (242)  
S Aug 31 (243)  
S Sep 1 (244)  
-------------------------------------------------------------------------------
Scheduled activities for Week 36:

M Sep 2 (245)  
T Sep 3 (246)  
W Sep 4 (247)   
T Sep 5 (248)  
F Sep 6 (249)  
S Sep 7 (250)  3rd SECCHI Cor 2 deep exposure campaign ends
S Sep 8 (251)  
-------------------------------------------------------------------------------


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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