Get SECCHI Data
SECCHI data access
All SECCHI FITS data is available online through this website. Access is provided directly to the individual directories that contain the data. We recommend the use of a tool such as wget to download data in bulk.
Release notes for the publication number can go here
Cosmic Ray Scrubbing
RESULTS FROM HI IMAGE SCRUBBING
Section 5.3.6 of the Software Operations Manual briefly describes two capabilities of the SECCHI flight software to remove cosmic rays from HI images. The first is a two image scrub where the current image is compared with the previous image on a pixel by pixel basis. If the current image pixel is greater than previous pixel plus N times the photon noise of the pixel, the pixel is replaced with the previous pixel. The three image scrub takes the median value of the current, previous and oldest image.
All Pointing Corrections For Hi 1 A And B
Layout: HI1-A (left), HI1-B (right)
2007:
2008:
2009:
2024 Geomagnetic Storms
In May 2024, Earth experienced some of the most intense geomagnetic storms seen in recent years. Solar eruptions that led to these storms were imaged by the SECCHI HI-2 camera on NASA STEREO-A. This image sequence shows the large CME front passing over Earth (far left, not to scale) along with concurrent Kp observations, which shows the Earth's geomagnetic response to the event.
Observations from the SECCHI HI-2 camera on May 12, 2024 (top), along with the concurrent "kp" geomagnetic activity index (lower). The location of Earth is as indicated on the left of the animation. [Credits: NASA/NRL/STEREO]