Observing Interplanetary Scintillation with Dual-Antenna Interference

It is an important method to study solar wind speed through observation of Interplanetary Scintillation (IPS). There are two big antenna with multi- frequency channels simultaneous observing interplanetary scintillation in Miyun Observatories NAOC. The aperture of the antenna is 40 meters and 50 meters respectively. There are two dual-frequency channels available in these systems: 327/611 MHz and 2300/8400 MHz. We will carriy out a comparison of these method using the normalized cross-spectrum and dual- frequency IPS measurement to observing the solar wind speed. Dual-Antenna Interference system have better sensitivity and time resolution. It can observe more weak radio sources one by one around the Sun. We can obtain more solar wind information on the Solar-Terrestrial distribution.