New Fdr Analysis By Frank Legge - Discussion, What do you think?
Jan 10 2011, 08:32 AM
Joined: 8-December 09
Member No.: 4,778
I'm reading the document and I am still very doubtful about what it says. Someone can give me some information about that?
Jan 28 2011, 12:01 AM
Group: Valued Member
Joined: 30-January 09
Member No.: 4,095
I'll have to search for Farmer's repeated "margin of error" claims but trust me, he said it.
Okay, had a wade through the swamp tonight...
That little 'bell shape' is what I am talking about in regards to 'error'. It is normal and it did not exist then one might think someone was making something up (pulling numbers out of their a%!). So if someone disputes the error band in the correlation of multiple measurement systems, then the dispute would only be to the variance of the band, not whether it exists or not. I have already pointed out that there are issues with both the accuracy and precision of the model. However, I understand those issues and have offered a data based adjustment to compensate for them. Sadly for P4T, the adjustment is still well SoC
I posted your path warren to gauge a response without telling them it wasn't mine:
AWSmith piped in here:
What did I ask you a few days ago about the accuracy of the google earth overlays? and if the pin locations were verified via GPS on site? The physical evidence of the flight path trumps all mudlark.
I replied here:
AWSmith piped in again:
And there you go with your push pins again, Are you that stupid? Did you not read where I asked you TWICE if the locations of your pins was verified with GPS on site? Did you not remember the problems with accuracy Google Earth has with overlays?
Beachnut had a pop here:
Farmer is right, there are errors,.....
Too bad the air was moving on 911. Farmer is right because the air moves, the compass is not exact,
Farmer discussed "margin of error" here: (and has since removed an image)
Mudlark, you have no idea what you just posted do you? Take the Warren decode and plot it at take-off at Dulles, then come back and we'll talk INS drift and measurement system error.
Oh never mind, I've already done it for you
Don't tell him there are errors on google earth, then he might understand the "error band" and have to learn math.
Get the claims straight mudlap. BCR claims that the MEASURED path by the various instruments has an error range associated with it. The actual flight path does not have a "margin of error", only the techniques used to measure it.
All of this started because I called them out on their insistence that the aircraft could fly parallel to the Nvy Annex, North of columbia Pike and still line up with the damage. This is false.
I asked them for the "SOC path" according to the FDR data and none f them would pin their colours to the official path. That there was a margin of error in the flightpath and that unless the plotted points are done with GPS, they will also have a margin of error.
How is your path plotted Warren? I ask because i genuinely don't know.
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