Maintained by: Nobeyama Radio Observatory.

Summary of Data Held: Worldwide solar radio data (collected directly and through WDCA and WDCB), with critical analysis and compilations giving corrected daily values. Available data include radio polarimeter records for 1958-1977 on microfiche and on magnetic tape from 1978.

Data Products, Publications, Catalogs: Results are published in the IAU Quarterly Bulletin of Solar Activity, with catalogs of discrete events, and solar activity charts incorporating meter wave data from Nançay, France and centimeter wave data from Toyokawa, Japan.