aboulang@bbn.com (Albert Boulanger) (01/07/90)
I found an interesting note in a recent Science blurb that you LOW-low-low lowfers (<100HZ!) might delight in :-). On page 1562 of the Dec 22nd Science there is a discussion of the Loma Prieta Quake. The discussion mentions an interesting correlation made by Antony Fraser-Smith and colleagues from Stanford: radio background noise activity in the 0.01 to 10HZ range was up 12 days before the quake. 3 hours before the quake it was up 30x from the previous level. (There was a drop 1 day before the quake.) There was nothing like this during the 2 years of operating this low-frequency broad-band receiver. (They were studying sun-related radio noise that interferes with submarine communications.) There is a picture of either the receiver or the antenna on page 1563. Does anybody know the principles of reception for this ultra-low frequency range? What kind of antenna would be used? Also, I have been interested in DXing of the ET kind. There has been a lot of good engineering put into wide-band-multichannel SETI (looking for signals from outer space) receivers. Anybody know more of the details on this? Yours in the miles and smiles of a wavelength :-), Albert Boulanger BBN Systems & Technologies Corp. aboulanger@bbn.com