John, We had a similar problem when we're trying to setup various antennas at various locations pointing at different true North bearings. It turned out quite hard to find true North.
We found single carrier GPS surveyed points to be inaccurate to produce good bearings across such a short base line. Also, you'll end up with two points with some bearing w.r.t. North. Now the problem is that of finding a third point to give you your N-S base line. In the end we used a tripod, calibrated gun sight and a turn table with degrees markings (those that the photonics people use). If you'd like to use this method, you survey a single point on your property (preferably on the base line your interested in). Also survey a land mark, like a radio mast a few km's away. The further away (the longer the base line) the less accurate your surveyed points need to be. Now calculate the North bearing of this base line using these two points. Now back at your property at the surveyed point, point your cross hair at the radio mast and set the number of degrees on the turn table to that you have calculated. Fix the turn table. 0 degrees should now be true North, and you could now use the cross hair to survey the other point. The tripod should be levelled very carefully, since errors here will put you in a different plane and you will end up calculating vector components in that plane. On 21 November 2013 20:52, <johncr...@aol.com> wrote: > I wish to establish a north south line on my property to an accuracy of > +/- 2 degrees. > Could this be done by loading a T-bolt, Antenna, Power source, and laptop > into my > little red wagon? The idea being to find two positions several hundred ft > apart where either LH or T-bolt Mon report the same latitude? Will either > of these programs report to sufficient accuracy? The base line would be 300 > ft, though more is possible.I realizes that the T-bolt is not a survey > device, but I can spend several hours fixing each position if required. > > All comments appreciated.?? -73 john k6iql > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.