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shawn-billings
shawn-billings
@shawn-billings
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Joined: May 29, 2012 9:14 am
Last seen: July 23, 2026 8:33 am
Topics: 93 / Replies: 2598
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RE: Javad report from a BLM employee

[sarcasm]I'll be sure to let them know that Kent McMillan said it just looks dumb.[/sarcasm]I guess you finally read the text and came to the conclusi...

12 years ago
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RE: Javad report from a BLM employee

Page 2 clearly shows ?(vertical) and ?(horizontal) to be at 95%. This is done throughout the paper.

12 years ago
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RE: Javad report from a BLM employee

You seem to be of the mind that anything that disagrees with your sensibilities is idiotic. As I mentioned in the earlier relevant thread to this topi...

12 years ago
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RE: Javad report from a BLM employee

The next release will reportedly figure the relative positional accuracy of two inversed points rather than the relative accuracy of the distance. Hop...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

br>It appears that documenting the 95% confidence error estimate with 2? is not always appropriate as the 95% confidence is not always twice the stand...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

Rambleon - scalarsI can envision what you are describing and I think I might set up a few test areas at various ranges similar to what you have descri...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

> Shawn, I think this thread and topic will be invaluable if you are able to help the Javad software folks implement some of the suggestions Kent h...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

Example of Relative Positional Precision - RTK> > What leads you to think there needs to be any scaling of the 95% error ellipse?> > Well,...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

Example of Relative Positional Precision - RTK> Yes, this is yet another example that shows how screwed up the relative accuracy figure is. By simp...

12 years ago
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RE: GPS help for an inexperienced user

If I understand your predicament correctly, it sounds like you weren't getting a good enough cell signal to get corrections from the internet. This wo...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

> Sometimes you guys crack me up.....chasing millimeters when you have your top heavy receiver 2 meters up in the air on a prism pole that has a 'k...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

Example of Relative Positional Precision - RTKA new example from today. Longer base-rover vector, longer rover to rover inverse. In 2010 we performed ...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

Could you elaborate on your position on number 5. Why can we not determine a 2 sigma positional uncertainty from a single rtk position?

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

That's a very fair question. I can only say that I've tested the distance relative accuracy on a couple of occasions and it seems very much in agreeme...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

Generally, who is advocating button pushing in this thread?> Can you refresh my recollection as to even one point upon which I've been wrong, parti...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

> The 50 ppm part is computed using the direct horizontal distance between the points being tested. Some folks try to inflate allowable error by co...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

Generally, who is advocating button pushing in this thread?Generally, who is advocating button pushing in this thread?Kent shared some concerns regard...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

The maximum allowable Relative Positional Precision for an ALTA/ACSM Land Title Survey is 2 cm (0.07 feet) plus 50 parts per million (based on the dir...

12 years ago
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RE: RTK Error Estimates in the Field - For Kent

> It looks to me as if you want to distract attention from the bizarre misconceptions present in the way that Javad presents their RTK data on the ...

12 years ago
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