STEREO - Solar Terrestrial Relations Observatory
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Important notice about reduced STEREO science operations

Latest SECCHI beacon images

Shown here are the latest SECCHI beacon images. The STEREO space weather beacon telemetry mode is a very low rate, highly compressed data stream broadcast by the spacecraft 24 hours per day. These data are used for space weather forecasting. Because of the large compression factors used, these beacon images are of much lower quality than the actual science data.

Update, 20 March 2015: The IMPACT, PLASTIC, and SECCHI instruments on Ahead have now been turned off for superior solar conjunction. This latest images service is therefore suspended until the instruments are turned back on again in July 2015 (or sooner if communication is restored with the Behind spacecraft). Earlier images are available through the daily browse pages.

However, for several days before instrument turn-off, the effects of radio scintillation from the much denser solar corona that the signal from STEREO Ahead had to pass through significantly affected the quality of the SECCHI images, starting around 14 March 2015. Very few of the SECCHI images from that period made it through the automated processing software that generates the web pages.

Realtime resources:     Browse resources:


Last Revised: Friday, 20-Mar-2015 16:25:11 EDT
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