Hi, 2019!
During the past 24 hours, solar activity was very low. There was no active region on the visible disk, and no C-class and above flares produced. The solar wind speed maintained at about 400 km/s. The geomagnetic field was quiet to unsettled.(2019-05-21)

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Focus and concentration on studying ionospheric models. Implementation service of ionospheric delay correction for satellite navigation and wide-area, local-area augmentation system. A basis paltform for exploring the change rules and physical mechanism of the ionosphere.

To understand the structure and change rules of the ionosphere; To reduce the space environment risk of satellite lauch; To improve the performance of satellite navigation system and radar; To increase the reliability of radio communications; To strengthen early warning and forecasting of earthquake and tsunami.