Have only recently become a fan of WSPR (principally on 2m) and am totally sold on it. As I gain a little experience, however, it has dawned on me that the significant unknown of antenna heading at the far end limits the value of WSPR as a path measurement tool. At VHF with high antenna gains, this is probably even more significant than power output which, of course, is already catered for. It's probably impractical but I wonder if it could be possible to extend WSPR to convey antenna heading?