Status Report of Syowa East and South Radars

Hisao YAMAGISHI, Akira S. YUKIMATSU and Natsuo SATO

National Institute of Polar Research, Japan.

Syowa east radar operated without no major problem all through the year in 1999-2000 with a good amount of back scatter. Syowa south radar restarted operation in February 1999 with a newly installed antenna array (Create Design Corp. Model CLP8020). Fairly good echoes were observed in the period of March-September 1999, but the sensitivity went down after October 1999. The reason of this trouble was turned out recently that some of the PIN diodes in high power T/R switches were used in improper manner when it was repaired at the station and the transmission loss was increased in the receive mode. These T/R swiches were repaired and the south radar recovered to normal sensitivity in March 2000. An MF radar was installed at Syowa Station in March 1999. As Syowa Station is located on a small island of 2 km by 1.5 km, the distance between the MF radar and the HF radars are in the order of 1 km. The MF radar suffered a sever interference from the HF radars. The interference was eliminated by data processing in the MF radar in 1999. The interference was completely cleared away in January 2000 by installing high power high-pass filters at the each output of 600W PAs of the HF radars.

Session Index

Proceedings Index