Hi, 2019!
During the past 24 hours, solar activity was low. There were two active regions (AR2735 and AR2736) on the visible disk. A C4-class flare associated with a partial CME was produced from AR2736. The solar wind speed decreased to about 370 km/s. The geomagnetic field was quiet.(2019-03-21)

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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.