Mechanism Statistics

SECCHI Shutter Mechanism Spin Times

Polarizer Spin Times

as of 2017/12/21 (COR 1-B 2014/09/30)

Note: For Feb.-Oct. 2012, the COR 1-B polarizer data points are a change from previous. A CCW test is done before the CW test. For previous CCW tests back in 2007, the mechanisms were first spun CW, then CCW. For 2012 the order was reversed. This change was implemented for all polarizers starting 2012/04/17, and then discontinued in October 2012.

Shutter mechanism spin times as of 2017/07/31 — Shutter mechanism spin times *as of 2017/07/31*

SECCHI Polarizer CCW Average Spin Times (graph) — SECCHI Polarizer CCW Average Spin Times

SECCHI Polarizer CW Average Spin Times (graph) — SECCHI Polarizer CW Average Spin Times

COR1-B Polarizer jitter problem

The following plots and data were generated by exp_check.pro:

Allexpplot – Plot of averaged exposures (actual - cmmanded):

polarizer jitter image — COR1-B Polarizer jitter problem

Plot of averaged exposures (actual - cmmanded): (graph) — SUMMARY PLOT OF 100-EXPOSURE AVERAGES OF (EXPTIME - EXPCMD)

Euviexpplot

Plots of EUVI averaged exposures (actual - cmmanded):

Cor1expplot

Plots of COR 1 averaged exposures (actual - cmmanded):

Cor2expplot

Plots of COR 2 averaged exposures (actual - cmmanded):

SECCHI-publication-number-goes-here

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]

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