[AT] OT-now GPS

[Henry Miller]

That is day to day, when working a field the inaccuracies are about the same and so they cancel out.  I know trimble has a some technology that isn't satellite based (all the big guys do), and some of that is free, so you are not just using satellite. You won't get to sub inch with the free stuff, but you are probably in a foot or so which is good enough.



On April 8, 2015 8:48:51 AM CDT, Ralph Goff <alfg at sasktel.net> wrote:
>On 4/8/2015 5:05 AM, Henry Miller wrote:
>> The laws of physics prevent the satellite only systems from getting
>more accurate than about 16 feet. You know how on a hot day things
>sometimes get wavy off in the distance? Same thing happens to satellite
>signals, and the satellite is much farther away than those hazy things.
>>
>>   Throw in something on the ground and you can get much closer.
>>
>> Disclaimer, I work for John Deere on the 4600 displays. I'm not
>speaking for them though.
>>
>16 feet? I would have to question that law. I use my trimble ezee guide
>
>running off the free satellites for seeding crops every spring now. It 
>is a 28 foot wide seeder and I can easily check the accuracy just by 
>looking over my shoulder at the ground , then glancing at the screen. 
>Seems like they match up the lines pretty well. The only misses I see
>in 
>the field are where I fall asleep and wander off the line :-)
>I even use it as an acreage counter since the mechanical counter quit
>on 
>the air seeder unit. I find it to be quite accurate. Maybe not the sub 
>inch accuracy of the rtk systems but plenty good enough for me.
>
>Ralph in Sask.
>
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