[time-nuts] Pulsars make a GPS for the cosmos

[Alan Melia]

There is actually little at 1421MHz from the sun the radiation from the sun 
is black body radiation  1421 is an electron flip more likely in isolated 
molecules (the sun is plasma not gas) or Hydrogen masers. We set up 12Ghz 
sat LNBs a couple of weekends ago to try and stimulate some school interest 
....big peak on sat finder. There are storms which generate signals in the 
VHF/ UHF range that can be heard on simple equipment ....receivers built 
with CBTV front-ends.(tuners)

Pulsars are very weak the flux is measured in Janskys and I get confused 
converting that back to radio values. but a 10m dish at about 600Mhz and you 
should get something on a UHF receiver though you often need something like 
the averaging of a box-car detector. You do need to know which direction to 
look in.

Alan (G3NYK)
Brit Astro Assocn Radio Astro Group

----- Original Message ----- 
From: "J. Forster" <jfor at quikus.com>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Sunday, September 29, 2013 12:13 AM
Subject: Re: [time-nuts] Pulsars make a GPS for the cosmos


> The sune is hugely bright in the RF.
>
> I've been able to see it at 2.2 GHz with nothing more than a horn a foot
> or so across and a receiver w/ a NF of maybe 8 dB (cavity preselector &
> mixer & IFA...   ACL SR-209).
>
> There was a noticable difference between pointing at the sun and in
> another direction.
>
> During a SETI search, when 80-odd foot dish was pointed at the sun, the
> preamp was completely saturated sat about 1421 MHz.
>
> -John
>
> =================
>
>
>> Hi
>>
>> If you are on the surface of the earth, you face the sun from time to
>> time. That creates some issues that you would not have in a deep space
>> setting. In deep space you don't have to correct for all sorts of orbital
>> issues as well. This is one of those - not so easy here - sort of things.
>>
>> Bob
>>
>>
>> On Sep 28, 2013, at 6:55 PM, Bob Stewart <bob at evoria.net> wrote:
>>
>>> Just to satisfy my curiosity: what's easiest to detect galactic pulse
>>> emitter (regardless of type), and what's the minimum setup to reliably
>>> look at it, whether it's just during night time, or whatever.  Just
>>> seeking perspective, I haven't just won the lottery.
>>>
>>> Bob
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>
>
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