SDO Solar Dynamics Observatory

SEC Space Environment Center

SEP solar energetic particle

SOHO Solar and Heliospheric Observatory

STEREO Solar-Terrestrial Relations Observatory

SWENET Space Weather European Network

SWPC Space Weather Prediction Center (NOAA)

SWWT Space Weather Working Team

TEC total electron content

USAF U.S. Air Force

USGS U.S. Geological Survey

WAAS Wide Area Augmentation System



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