Review of Propagation prediction programs - VOACAP-based
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DX Atlas: Amateur Radio software
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Amateur Ham Radio HF Propagation Tools - Steve Nicols G0KYA : ICQ Amateur / Ham Radio Podcast : Free Download, Borrow, and Streaming : Internet Archive
DX Atlas: Amateur Radio software
3D wireless prediction software models EM surfaces - EDN
2020 Extra Class study guide: E3C – Radio horizon; ground wave; propagation prediction techniques and modeling; effects of space weather parameters on propagation - KB6NU's Ham Radio Blog