View single post by pipesmokingman
 Posted: Sep 19th, 2009 12:19 PM
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pipesmokingman

 

Joined: Sep 19th, 2009
Location: Plymouth, United Kingdom
Posts: 29
Status: 
Offline
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
  1. Solar wind observations.
  2. Continuum observations.

150.05 - 153 MHz
VHF
  1. Continuum observations.
  2. Pulsar observations.
  3. Solar observations.

322 - 328.6 MHz
UHF
  1. Continuum observations.
  2. VLBI

406.1 - 410 MHz
UHF
  1. Continuum observations.
  2. Pulsar observations.

608 - 614 MHz
UHF
  1. Continuum observations.
  2. VLBI

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
  1. VLBI
  2. Line observations.
  3. Continuum observations.

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
  1. Continuum observations.
  2. VLBI

5000 - 5030 MHz
C-band
VLBI

6650 - 6675.2 MHz
C-band


10.6 - 10.68 GHz
X-band
  1. Continuum meausurements.
  2. VLBI

10.68 - 10.7 GHz
X-band
  1. Continuum observations.
  2. VLBI

14.47 - 14.5 GHz
Ku-band
  1. Spectral line observations.
  2. VLBI

15.2 - 15.35 GHz
Ku-band
VLBI

15.35 - 15.4 GHz
Ku-band
  1. Continuum observations.
  2. VLBI

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
  1. Methyl Formate
  2. Ammonia
23.07 - 23.12 GHz
Ka-band
Spectral line observations

23.6 - 24.0 GHz
Ka-band
  1. Spectral line observations
  2. Continuum observations
Ammonia line
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
  1. Hydrogen cyanide
  2. Hydroxil
42.5 - 43.5 GHz
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
  1. Spectral line observations.
  2. Continuum obserations.

92 - 94 GHz

Spectral line observations.
Diazenylium and many other lines.
95 - 100 GHz
  1. Spectral line observations.
  2. Continuum observations.


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 :biggrin: