Ionosphere Physics Data from Belgrano and San Martin Bases, Antarctica

Vertical incidence ionosoundings are being performed at the Belgrano and San Martmn stations. Ionospheric cosmic noise absorption is continuously recorded at the same stations, at a frequency of 30 MHz. Data collection began at the Belgrano I Base in 1969 and continued until 1979. Data collection began at Belgrano II Base and San Martin Base in 1980 and 1991, respectively. Data collection is continuing at both the above bases.