Provided by our member František Janda, OK1HH, this is the forecast of solar and geomagnetic activitiy. It used to be released by the Astronomical Institute, Solar Dept., Ondrejov, Czech Republic until December 31, 2011. Besides the solar activity datas, this full service has been discontinued after 34 years.
Fortunately, the OM Petr Kolman, OK1MGW, and František Janda, OK1HH, have decided to provide the forecast of solar and geomagnetic data as well as a brief HF propagation prediction as "Propagation Interested Group" (P.I.G.) on a voluntary basis and in a new format for some interested parties, and DTC is delighted and proud to be among those to receive this service.
DTC propagates the forecast by airing it on HF by DKØDTC as part of our regular Monday QTC transmissions.