Radio observations for monitoring ionospheric irregularites during the solar eclipse on March 9, 1997 were carried out with the Miyun Synthesis Radio Telescope(MSRT), Beijing Astronomical Observatory. A wave-like disturbance (Traveling Ionospheric Disturbances, TIDs) of phase gradient about 10deg/km was found. The disturbance oscillated for three cycles and started almost at the eclipse-biginning time and ended before the maxmium eclipsedepth time.
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