Wednesday, April 14, 2021

EVE Cruciform Maneuver Today

SDO will perform the EVE Cruciform Calibration Maneuver today from 1300 UTC (9:00 am ET). During the maneuver science data may be missing or blurred.

Tuesday, April 13, 2021

Celebrating A Solar Cycle of Discovery with SDO

You are Invited to Contribute your Solar Research to a Topical Collection of Solar Physics on “Celebrating A Solar Cycle of Discovery with SDO”


We solicit manuscripts on this general subject for inclusion in a Topical Collection of Solar Physics.  The deadline for submission of statements of interest (SOI) with a tentative title, abstract, author list, and three suggestions for referees, via e-mail to is 15 June 2021, and the nominal deadline for manuscript submission is 22 October 2021.

This Topical Collection is an outgrowth of the “SDO 2021 Science Workshop: A Solar Cycle of Discovery,” which was held as a series of virtual workshops 12 February – 15 April 2021 ( This Topical Collection is not a conference proceeding, and it is not limited to research presented at the workshop. All submissions must be complete original papers that meet the regular quality requirements of the Journal. The Topical Collection will start off with several invited reviews to summarize the subject and frame the work in the research papers which follow. Please consult for recent Topical Collections.

Topics to be included in the Topical Collection include:

·         Subsurface Flows, the Dynamo, and the Solar Cycle

·         Magnetic Flux in the SDO Era: From Emergence to Eruption

·         Vector Magnetic Field: Progress and Prospects

·         Energy and Mass Transfer Between the Corona and the Chromosphere

·         Short-term Solar Variability

·         Phun with Photons: Response of atmospheres to EUV variability

·         The SDO Corona and Beyond

·         SDO for Space Weather: Science and Applications

For further information, and submission of statements of intent, please contact John Leibacher (Solar Physics editor: or Dean Pesnell (guest editor), Ryan Milligan (guest editor), and Shin Toriumi (guest editor) at

Wednesday, April 7, 2021

Calibration Maneuvers Today

SDO will execute two calibration maneuvers on April 7, 2021. The EVE Field of View (FOV) maneuver will begin at 1315 UTC (8:15 am ET). The HMI/AIA Flatfield maneuver will begin at 1630 UTC (11:30 am ET). During a calibration manuever the SDO science data may be missing or blurred. HMI science data is only available when SDO is in Sun-pointing mode.
Here is an AIA 171 Å picture from today's maneuver. The straight edges on the left and top show that SDO is pointed slightly away from Sun center. The image is re-centered by the processing software.

Tuesday, February 16, 2021

Happy 11th Birthday to SDO

SDO was launched 11 years ago on February 11, 2010. It was a beautiful launch into mostly clear skies over the Kennedy Space Center in Florida. SDO has watched almost all of Solar Cycle 24, and now the beginning of Solar Cycle 25. Scientists have used SDO data to publish over 5000 papers on how the Sun works, emphasizing the creation and destruction of the solar magnetic field. Here's a movie of the Sun in AIA's 193 Å passband on February 11, 2021, showing a large filament (dark line in the southern hemisphere) just outside of a dark coronal hole. There's a bright region to the left of the filament that sits over a magnetic field concentration that never formed a sunspot. It looks like Solar Cycle 25 will be as much fun as SC 24!

Station Keeping Maneuver # 22 on February 10, 2021

SDO will perform Station Keeping maneuver #22 on Wednesday, February 10, 2021, at 1737 UT (12:37 pn ET) and lasting about 30 minutes. During the maneuver science data may be blurred or missing. This maneuver keeps SDO inside its assigned box as it passes through the geostationary belt.

Tuesday, January 19, 2021

SDO Images will be on US Stamps in June!

According to this NASA News Release, SDO images will be featured on a set of USPS First Class Forever stamps. Here's what the stamps will look like.

SDO's 100's of millions of images of the Sun’s dynamic and dazzling beauty have captivated millions of people. Near the summer solstice of 2021 you should be able to use these select 10 as beautiful stamps. Watch for them!

Tuesday, January 12, 2021

Tomorrow is the First SDO Lunar Transit of 2021

January 13, 2021, will see the Moon pass across the face of the Sun between 0556 and 0625 UTC (00:56 and 1:25 am ET). Here's a movie of the transit from the SDO Flight Operations Team.

This transit occurs while SDO is near the midnight sector of its orbit. That means the motions of the Moon and SDO combine to make this a short transit, lasting only about 30 minutes.