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C.C.R.M. is providing an online and real-time tropospheric propagation survey on the aeronautical VHF band.

Over-the-orizon beacons are monitored 24/24hrs (not normally heard) and relative signal-to-noise like measurements (called index) are made continuously over those frequencies, providing, hence, a tool on estimating abnormal tropospheric propagation conditions.

C.C.R.M. provides with two kinds of graphics refreshed every 15 minutes on our web site. The first one is a map of Europe around CCRM facility site, giving actual propagation indexes. The second one is a continuous index multi-plot of the stations monitored.

Map - Plots

Every month a report is made and sent to members. Specific daily reports can be provided on request.