SFI (Solar Flux Index) (70 – 100+) Higher is better
A Index (1 – 11+) Lower is better
K Index ( 0 – 5) Lower is better
HF Propagation
SFI (Solar Flux Index) (70 – 100+) Higher is better
A Index (1 – 11+) Lower is better
K Index ( 0 – 5) Lower is better