View single post by pipesmokingman | |||||||||||||
Posted: Sep 19th, 2009 12:19 PM |
|
||||||||||||
pipesmokingman
|
one of my main problems with DRV is of course the possibility of terrestial or even space signals interfering - however there are recognised "quiet " frequencies used for radio astronomy : 13.36 - 13.41 MHz HF 25.55 - 25.67 MHz HF 37.5 - 38.25 MHz VHF Continuum observations 73 - 74.6 MHz VHF
150.05 - 153 MHz VHF
322 - 328.6 MHz UHF
406.1 - 410 MHz UHF
608 - 614 MHz UHF
1400 - 1427 MHz ** L-band Spectral line observations 21cm hydrogen line 1660 - 1660.5 MHz L-band VLBI 1660.5 - 1668.4 MHz L-band
1668.4 - 1670 MHz L-band 1718.8 - 1722.2 MHz L-band 2655 - 2690 MHz S-band Continuum observations 2690 - 2700 MHz S-band 3260 - 3267 MHz S-band 3332 - 3339 MHz S-band 3345.8 - 3352.5 MHz S-band 4800 - 4990 MHz C-band Continuum observations 4990 - 5000 MHz C-band
5000 - 5030 MHz C-band VLBI 6650 - 6675.2 MHz C-band 10.6 - 10.68 GHz X-band
10.68 - 10.7 GHz X-band
14.47 - 14.5 GHz Ku-band
15.2 - 15.35 GHz Ku-band VLBI 15.35 - 15.4 GHz Ku-band
22.01 - 22.21 GHz Ka-band Spectral line observations Water line. 22.21 - 22.5 GHz Ka-band Spectral line observations Water line. 22.91 - 22.86 GHz Ka-band Spectral line observations
Ka-band Spectral line observations 23.6 - 24.0 GHz Ka-band
31.2 - 31.3 GHz Ka-band Continuum observations 31.3 - 31.5 GHz Ka-band Continuum observations 31.5 - 31.8 GHz Ka-band Continuum observations 36.43 - 36.5 GHz Ka-band Spectral line observations
Q-band Spectral line observations Silicon monoxide and many other lines. 48.94 - 49.04 GHz Q-band Spectral line observations Carbon monosulphide 51.4 - 54.25 GHz V-band 58.2 - 59 GHz V-band 72.77 - 72.91 GHz V-band Spectral line observations Formaldehyde line. 86 - 92 GHz W-band
92 - 94 GHz Spectral line observations. Diazenylium and many other lines. 95 - 100 GHz
now one of the most interesting ( to me ) is the 1400 t0 1427 MHz band as this is where the hydrogen line resides - and as this is one of the most common elements in the universe ( apparently ) then would it not be a good candidate for use by spirit ?? of course i know it is unlikely that many of you have equipment for listening to these higher frequencies - but if you do - any one had any results ?? certainly - the above list gives areas down to HF where it seems that there is a good chance of no or few interfering signals - and i think that the spiricom team tried some of the higher ones ( if memory serves ) any ways comments please
|
||||||||||||
|