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Very much a better adjective as surface wave covers both ground wave and line of sight comms,which predominate at 27 mhz.At higher hf frequencies the actual ground wave portion is very limited due to ground absorbtion.

tropospheric ducting would come under skywave propagation like sporadic e,f1 and f2 layer propagation,auroral scatter modes etc,theres also a type of ducting found close to water,which for arguments sake i'd call sea ducting,similar effect to tropospheric ducting,all of which can take place on 11m.

I'm very sorry to hear of the loss of your best friend,had i known i personally would have been a lot less stroppy in previous posts,my sincerest condolences and sorry for being a retard in a tough time for you.

[QUOTE="jazzsinger, post: 225825, member: 7426"] Very much a better adjective as surface wave covers both ground wave and line of sight comms,which predominate at 27 mhz.At higher hf frequencies the actual ground wave portion is very limited due to ground absorbtion. tropospheric ducting would come under skywave propagation like sporadic e,f1 and f2 layer propagation,auroral scatter modes etc,theres also a type of ducting found close to water,which for arguments sake i'd call sea ducting,similar effect to tropospheric ducting,all of which can take place on 11m. I'm very sorry to hear of the loss of your best friend,had i known i personally would have been a lot less stroppy in previous posts,my sincerest condolences and sorry for being a retard in a tough time for you. [/QUOTE]

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