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Old 6th Apr 2014, 04:17
  #9272 (permalink)  
Mesoman
 
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Widely separated ping detects, and probabilities

You are assuming that the different boxes have to be in the same place..
It is pretty hard to come up with a likely scenario that separates the boxes by 300mi. Possible, but pretty unlikely.

Angus Houston is pretty clear that these detects are iffy. However, he also said that these pings are the most promising leads so far. According to the CNN correspondent, the latest, refined satellite-based estimates target the same narrower area as where the pings were heard.

I believe these devices simply emit an unmodulated, short burst of 37.5khz energy. This is not a highly distinct signal, especially if it is very weak and thus corrupted by a lot of noise. Perhaps someone with more knowledge can comment on the nature of these "pings."

A comment... these ULB pings are unrelated to the satellite pings. The satellite pings are request/response transmission pairs. The ULB pings are just bleeps emitted periodically by the ULB.
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