www.rsgb.org/propquest – FoF2 critical frequency and extrapolated MUFs

www.rsgb.org/predtest

– ITURHFPROP-powered predictions (G4FKH)

www.rsgb.org/proppy

– ITURHFPROP-powered predictions (HZ1JW)

www.rsgb.org/voacap

– VOACAP-powered predictions (OH6BG)

www.rsgb.org/g0kya

– At-a-glance hourly VOACAP predictions (G0KYA)

 

www.predtest.uk

– Predtest ITURHFPROP predictions

soundbytes.asia/proppy/

– Proppy ITURHFPROP predictions

www.voacap.com

– VOACAP Online