Er, given the IE at 20:31.11.91, 4.69 seconds after that would be 20:31:16:60, where 20 = 8PM, 31 = 31 minutes, 16 = seconds, 60 = hundredths of seconds.
Using TWA800.com's same webpage, their revealing "composite radar graphic (pdf) (gif)," places the next primary radar "blip" at 20:31:46.
You obviously made a mistake reading that radar map (which I've already posted). The first return from Islip is the point marked as 1, which was at 20:31:16:49 (shown as 31:16:49 on the graphic for clarity).
I'll post again here for all to see..
Subtract 4.69 seconds from 31.46 seconds, and the previous primary radar "blip" calculates to 20:31:11.80, which would be just a bit earlier on TWA800.com's chart than the last transponder return at 20:31:12.00.
Uh, that's 31 minutes and 46 seconds, so 31:46 (which isn't valid as I've shown) minus 4.69 seconds would be 31:43:31...
Let me repost a little something I've already posted, and we can see just how high TWA800 was at 20:31:46.
According to the radar returns, the last return of the main body of TWA800 before it hit the water was at 8:31:48:94. Considering an error of up to 4.69 seconds due to the period of the Isplip radar sweep, TWA800 hit the water between roughly 8:31:49 to 8:31:54.
A simple physics calcultion should tell us how high TWA800 was at 21:46 if we look at the difference between that time and the time it hit the water.
Given that d = (g * t2)/2, where;
d = distance in feet
g = acceleration due to gravity = 32 feet / s2
t = time in seconds,
to find the approximate height of TWA800 at 8:31:46, we first calculate for 8:31:49, where we have a three second difference, and for 8:31:54, where we have a 8 second difference.
d = (32 * 32)/2 = 144 feet,
d = (32 * 82)/2 = 1024 feet.
So, the altitude of TWA800 was between 144 feet and 1024 feet at 8:31:46. That obviously was shortly before it hit the water...
One MAJOR reason I posted all of that was because of the infamous Asmodeus and his "time line", where he claims that at 8:31:47, there was the "Explosion of Massive Fireball" at 5500-7500 feet.
That is physically impossible, as I've shown with the calculations..
8:31:11 Intact and climbing 747 approaches 13,800 feet.
8:31:12 Initiating Event at 13,800 feet followed immediately by the commencement of the decapitation process.
8:31:43-8:31:47 Streak of light appears.
8:31:47 Explosion of Massive Fireball at 5500-7500 feet.
8:31:55-8:31:57 Splashdown of the Massive Fireball flames.
The readers have now seen your huffnpuff attacks on the above timeline and The "Missile Witnesses" Myth. Please provide them with your timeline.