Aal77 Fdr Decoder Program, Decodes almost 4 more seconds Options

[wstutt]

I have created a new program to decode AAL77's raw FDR file.

I am making it available for download along with it's source code and some output files from the program.

You can read more about it here

It decodes almost 4 more seconds of data than what appears at the end of the NTSB CSV file.

I welcome suggestions for any more parameters you would like decoded or any other features you would like added.

I will also be discussing this on the J.R.E.F. "AA77 FDR Data, Explained" thread as well as here.

Warren.

mod edit: Although Pilots For 9/11 Truth do not have any reason to believe the above program is offered for any nefarious purpose, we felt the responsibility to add this disclaimer. Pilots For 9/11 Truth do not vouch for nor is responsible for any of the data provided above by Warren. Nor can we guarantee his program is free of malicious code. Download at your own risk.

This post has been edited by rob balsamo: Oct 22 2009, 05:38 PM

[Domenick DiMaggi...]

im curious to why warren says at other places the last decoded altitude is 4 feet and yet in this thread when you explain to him how its still to high to hit light poles and the pentagon he doesn't bother to mention this yet he is sayin this at other places.

warren?

[rob balsamo]

im curious to why warren says at other places the last decoded altitude is 4 feet and yet in this thread when you explain to him how its still to high to hit light poles and the pentagon he doesn't bother to mention this yet he is sayin this at other places.

warren?

I assume you mean Randi's kids. I haven't visited Randiland in quite some time as mostly its just a romper room of personal attacks, libel, photoshopped pictures.. etc.

But i assume they are putting all their eggs in the Radalt basket and making excuses for Pressure altitude.

The last Radar Altitude in Warrens data is 4 feet. This does NOT mean 4 feet above the ground. Radar Altimeters send out a signal straight down from the aircraft that bounces off any object, ground, building, tree.... whatever, and returns to the aircraft giving a read out of your height above that object. Kind of like a Fish-Finder or depth gauge on a boat.. if you will....

The Radar Altitude prior to that is 57 feet. There is a one second interval between the two. Based on speed, thats only 815 feet horizontally. The light poles cover an area up to ~1020 feet from the pentagon. The light poles only get up to 36 feet above ground IIRC? 57' is too high to hit the initial light poles The slope made by the RadAlt is also above the tops of the poles when working backwards from the impact hole.

This is why we have to look at Pressure Altitude adjusted to True altitude and correlate for a more precise measurement and placement of the aircraft. Since the Pressure altitude is still too high, the only logical conclusion based on the data is that the Radar Altitude at 4 feet is not measuring the distance to the ground, but some other higher object, perhaps the top of the Pentagon?

Now, I'm sure the GL's are hand waiving and making all types of excuses for the higher pressure altitude, such as "altimeter lag", as they did before we decoded the raw file and only had the original CSV file from the NTSB, and therefore only Pressure altitude. But like then, they have no evidence for such lag, just innuendo, theory and speculation while we now have several American and United 757/767 Captains who have actual time in the aircraft reportedly used on 9/11 and have never seen such "lag" in their aircraft not to mention they think the speeds are ridiculous, especially pulling more than 2 G's at more than 130 knots over Vmo in a 757. Warren, you may want to inform Randi's kids to familiarize themselves with a Vg diagram.

Randi's kids are probably also reaching at the limits of margins for error in favor of their "impact" theory as well. The FAA allows +/- 75' margin for error on altimeters which pilots check prior to take off. The AA77 FDR altimeter margin was -13 feet at take off. This is the correct margin for error which should be applied as no altimeter "drifts" 62 feet more off True Altitude during a single flight creating the largest margin for error. Not to mention you have to add the 13 feet to AA77 FDR altimeter to get a proper height. In other words, I calculated 174 feet above in the Alt Sim. When adjusting for instrument error, the True altitude is 187.

To keep it simple...

If the FDR was in the aircraft which flew over the pentagon, the data recorded would look like what Warren has provided.

If the FDR was in an aircraft which caused the damage at the Pentagon, the data would not look like what Warren provided and would show a lower Pressure altitude to match the Radar Altitude.

Hope this helps Dom, and thanks for asking the question as I'm sure Randiland is in full spin mode with theory and speculation for Pressure altitude.

Also, I would like to make one thing clear (and no offense to you Warren as I have no reason to believe you are anything but sincere, but I do feel a responsibility to add this disclaimer),

Pilots For 9/11 Truth do not vouch for nor is responsible for any of the data provided above by Warren. Nor can we guarantee his program is free of malicious code. Download at your own risk.

[wstutt]

<snip>
Also, I would like to make one thing clear (and no offense to you Warren as I have no reason to believe you are anything but sincere, but I do feel a responsibility to add this disclaimer),

Pilots For 9/11 Truth do not vouch for nor is responsible for any of the data provided above by Warren. Nor can we guarantee his program is free of malicious code. Download at your own risk.

No offence taken Rob.

I also put a disclaimer for the program on my web site.

One of the reasons I provide output files is so that people can still look at the results if they feel uncomfortable installing and running the program on their own computers.

I also provide the source code so that the results in the output files can be independently verified should people wish to. I welcome suggestions on how independent verification of the results in the output files can be made easier.

Warren.

[rob balsamo]

No offence taken Rob.

Thank you Warren, I'm glad you feel that way as I felt the disclaimer needed to be included in the OP.