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MOST LIKELY ROUTE IS THE SOUTH
AND MOST LIKELY ENDING IS IN
ROUGHLY THE AREA THEY'RE LOOKING
NOW.
>> SO CHAD MYERS IS HERE.
HOW EXACTLY DID IT WORK?
>> WE STILL HAVE THE SAME NUMBER
OF PINGS.
BUT WHAT HAS CHANGED, THE
ENGINEERS AT INMARSAT DIDN'T
EVEN KNOW THEY COULD DO IT, BUT
THEY FIGURED OUT THEY COULD FIND
OUT WHETHER THE PLANE WAS FLYING
TOWARD THEIR SATELLITE OR AWAY
FROM THE SATELLITE BY WHAT IS
CALLED DOPPLER SHIFT.
SO WE TALKED TO INMARSAT AND
THEY SAID DOPPLER SHIFT IS WHAT
WE USED.
THINK OF IT ON A GIANT FLAG POLE
IN THE MIDDLE OF THE INDIAN
OCEAN.
IT STAYS OVER THE EXACT SAME
SPOT ALL THE TIME.
64.5 DEGREES EAST.
SO NOW LET'S LOOK AT WHAT WE
THINK THE PINGS PROBABLY LOOKED
LIKE.
THEY HAVEN'T RELEASED THEM, BUT
WE'RE PRETTY CLOSE HERE.
WE HAVE WHERE THEY THOUGHT THE
PLANE PROBABLY STARTED AND WHERE
IT ENDED.
I HAVEN'T DRAWN ALL PINGS SO I
CAN KEEP IT SIMPLIFIED.
BUT THIS IS THE SDANTS TO THE
FIRST, THE SEGTD, COND, THE THID
FOURTH.
WE ALWAYS BETWEEN KNOW THE
DIFFERENCE.
BUT WHAT IS DIFFERENT, ARE THE
PLANES MOVING INSIDE THE CIRCLE
OR OUTSIDE THE CIRCLE.
THAT'S THE DOPPLER EFFECT.
I'LL TAKE YOU TO WHAT I BELIEVE
THE DOPPLER EFFECT IS ESPECIALLY
FOR THE FIRST PING.
WE SAY 2:11.
WITHIN A COUPLE HUNDRED MILES.
THE PLANE WAS FLYING INSIDE THE
RING WHICH MEANS IT WAS GETTING
CLOSER TO THE SATELLITE ITSELF.
SO THIS IS DOPPLER RADAR.
WE USE DOPPLER RADAR TO KNOW
THIS IS TUSCALOOSA'S TORNADO.
IS T
THIS IS MOVING THIS WAY BY
DOPPLER SHIFT.
WE KNEW AT THE TIME THERE WAS A
TORNADO ON THE GROUND RIGHT
THERE AT TUSCALOOSA.
WHERE ELSE CAN YOU HEAR DOPPLER
SHIFT?
IF YOU HEAR A FIRE TRUCK OR
TRAIN OR RACECAR GO -- THERE'S A
SHIFT.
IF YOU'RE GOING CLOSER, THE
FREQUENCY IS DIFFERENT THAN
MOVING AWAY FROM YOU.
THE TRAIN MOVES ACROSS, SOUND
GETS LOWER AS THE TRAIN GOES BY.
BACK TO THE SATELLITE.
THIS IS THE FIRST PING.
THERE IS A SECOND PING THROUGH
HERE, A THIRD PING DOWN HERE.
THIS PING IS GETTING CLOSER TO
THE SATELLITE.
THIS PING IS FLYING ALONG THE
LINE.
THE PING DOWN HERE IS DEFINITELY
FLYING AWAY FROM THE SATELLITE
TO GET IT DOWN TO AUSTRALIA AND
THE LAST PING HERE, WE DON'T
KNOW IF IT WAS THE END OF THE
FLIGHT OR WAS THERE STILL
ANOTHER HOUR OF FUEL OR 59
MINUTES, BUT NO 9:11 A.M. PING.
SO INMARSAT SAYS IF ALL THIS IS
TRUE, THERE IS NO POSSIBLE WAY
THAT WE CAN MAKE ALL OF THAT NEW
DATA FIT TO ANY FLIGHT PLAN
GOING THIS WAY.
IT HAD TO GO THAT WAY IF ALL OF
THESE THINGS CAME TRUE.