On Nov. 9, 2015, NASAÕs Solar and Terrestrial Relations Observatory Ahead, or STEREO-A, once again began transmitting data at its full rate. For the previous year, STEREO-A was transmitting only a weak signalÑor occasionally none at allÑdue to its position almost directly behind the sun. Subsequently, as of Nov. 17, STEREO resumed its normal science operations, which includes transmission of lower-resolution real-time dataÑused by scientists to monitor solar eventsÑas well as high-definition, but delayed, images of the sunÕs surface and atmosphere.





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