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Data to be used in the context of an aviation accident investigation. it's a satellite not designed to track. it was some clever engineering that gave us these circles on the globe to look at. they involve use of the doppler effect to get an idea of which direction the plane might be going. it's fascinating, actually, and really never been employed in this man manner. why not at least open the books on that? >> why not release this to have professors at the best universities around the world? >> because it's a slippery slope and miles knows it. >> why not carve out this one thing, though? >> w...

A discussion we've been having that has exploded on social media over the last few minutes about the free flow of information in this case. miles, you've been calling for really the release of all the data, satellite data, radar data. more information out there to get more eyeballs on it. >> well, that would be pretty controversial. let's just start with inmarsat though. because this is unconventional data to be used in the context of an aviation accident investigation. it's a satellite not designed to track. it was some clever engineering that gave us these circles on the globe to look at. th...

Data, satellite data, radar data. more information out there to get more eyeballs on it. >> well, that would be pretty controversial. let's just start with inmarsat though. because this is unconventional data to be used in the context of an aviation accident investigation. it's a satellite not designed to track. it was some clever engineering that gave us these circles on the globe to look at. they involve use of the doppler effect to get an idea of which direction the plane might be going. it's fascinating, actually, and really never been employed in this man tmanner. why not open the door on...

Five aircraft spotting things northeast on credible lead from radar data. this data indicates the plane was traveling faster, possibly, than previously estimated. michael kay former adviser to uk ministry of defense has been involved in other crash investigations and he joins me now. >> hi, gretchen. >> so new information, 700 mile more to the northeast. what do we make of it? >> what we have to keep remembering, gretchen, this investigation is still assumptions based. what it does, reduces the accuracy of the search area. lets have a recap where we are. we know from doppler effect on radar we...

Malaysian government's track record, it's a little hard to take it at face value here. this is a very, very sophisticated analysis. as you know, it's based on what they call the doppler effect. when you hear a siren coming towards you, that frequency changes, that's the doppler effect. well, they're looking at the satellite versus airplanes flying away from it. first time it's of been done. none of us have seen the data. i think the chinese are right. we want to look at this data to make sure they really got it right this time, because they certainly had it wrong most of the last couple weeks....