I congratulate Whitham D. Reeve for the results he is obtaining with his e-Callisto system:
http://www.reeve.com/e-callisto.htm
http://www.reeve.com/e-callisto.htm
e-Callisto is an instrument designed by Christian Monstein at ETH Zurich for Solar radio spectrometry in the 45 ~ 870 MHz frequency range.
Please see the e-Callisto network page for more details:
http://e-callisto.org/
Above is an example of the many interesting Solar spectra Whit shows at:
http://www.reeve.com/e-callistoSpectrograms.htm