Another omission: By "Az", I ;mean your desired azimuth, expressed in angular distance-in-azimuth from north or south, whichever of those distances is less (depends on whether your intended azimuth is closer to north or to south)..
The appeal of the briefer solution that someone else posted is clear. Ok, I don't think there will need to be any more fixes or corrections by me. Again, sorry about the omissions and typos, and the necessary corrections and fixes. Michael Ossipoff
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