The satellites drift a bit, so from one month to the next, you can 'move' 20 feet....
If you have a known starting point - one of your corners? And you have a good view of the whole sky to get a lot of satellites then you can work from there with it and get within 10 feet, likely within a foot.
The high tech units that cost a bundle use some point on land (RTK from a tower) and so they always know where that fixed point is, and where the satellites place you, and can get within an inch or less. You sort of emulate this if you are dead certain of one point, and you can work fast enough that the satelte drift doesn't move you too much.
Mine has a feature of adding better sensitivity, uses a bit more battery power, to do the 3 foot accuracy, vs a 10 foot accuracy.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
... [Read Article]
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