Sofar and Roswell

Roswell was a place where an UFO crashed at 1947. Then the US government covered it up with a story of a crashed weather balloon. The X-files was a TV series based on this urban legend that then grow out of proportion. The series is very enjoyable and interesting to watch. The ”factual” story behind Roswell is quite as amazing, as told by a brilliant physicist and Berkeley professor Richard A. Muller. The Berkeley university has made a wonderful policy of uploading complete courses online available under a Creative Commons license! I love especially the Muller lectures, some of which are also available on YouTube. He makes each lecture very interesting and educational and can explain the physics in an easily understandable way. He doesn't go into the deep mathematics, but rather explains qualitative facts of nature and makes all subjects connect to real life. The Sofar bomb, actually, is a mind-blower. This item was used in WW2 as an SOS device for the pilots who flew over the Pacific Ocean. They threw an hollow sphere into the ocean and the navy could approximate their location and come to rescue. Those who have seen the Hunt for Red October know about the sound channel. In this channel the sound waves bend and reach high ranges because the channel reduces the scattering. The same phenomenon appears also in the atmosphere. This is what the Roswell weather balloon was measuring. Cold war signals from USSR. So when the balloon crashed, the ”flying discs” they had collected were in fact circular microphones. What was the saucer then?