Real-time data distribution sub-system in space weather forecast

Solar activity is one of the main sources of space disturbances, which are primarily responsible for space disaster weather. Solar activity is concerned with 11 year periods and has many exhibitions, such as change of sunspot numbers and solar radio flux at 10.7 cm wavelength. In order to make further research on solar action and develop space weather forecasting, the real-time observed data should be well utilized. Therefore, we designed a data acquisition, antenna control and real-time Web-based database system for the 2840 MHz solar radio telescope. The paper introduces the whole design of a PCI-based data acquisition, antenna control and real-time Web-based database system for the solar radio observation at Huairou, Beijing. The popular PCI controller, PCI 9052, is used to implement the interface between PCI bus and peripheral devices. A PLD chip is used for data transfer and antenna control. A Windows device driver has been developed based on Driverworks and Windows DDK. The real-time database is based on MySQL and Apache.