[time-nuts] Sun Outage

Graham planophore at aei.ca
Thu Oct 9 18:14:55 EDT 2014


If you have an interest in trying to measure sun noise, you might like 
to have a look at the "itty bitty radio telescope".

(watch the line wrap)

http://www.arrl.org/files/file/ETP/Radio%20Astronomy/Build%20a%20Homebrew%20Radio%20Telescope-QST-0609.pdf

http://www.gb.nrao.edu/epo/ambassadors/ibtmanualshort.pdf

http://www.stargazing.net/david/radio/itty_bitty_radio_telescope.html

as a start. A google search will return more.

cheers, Graham ve3gtc



On 2014-10-09 14:23, paul swed wrote:
> Exactly geosyncs have sun outages as the sun aligns with the sat and your
> dish.
> GPS because the sats are distributed do not suffer from the effect.
> Regards
> Paul
> WB8TSL
>
> On Thu, Oct 9, 2014 at 2:04 PM, Mike Feher <mfeher at eozinc.com> wrote:
>
>> Bob -
>>
>> I do not believe it has any effect. The DirecTV satellites are
>> geostationary at about 22K miles. I used to experience the same phenomenon
>> in the late 70's with my TVRO receiver at C band. GPS has some 36 or so
>> satellites in a Medium Earth Orbit (MEO). Blockage, if it can even occur
>> due to the nature of the receiving antenna, of a single one for a few
>> minutes will have no discernible effect in my opinion. 73 - Mike
>>
>> Mike B. Feher, EOZ Inc.
>> 89 Arnold Blvd.
>> Howell, NJ, 07731
>> 732-886-5960 office
>> 908-902-3831 cell
>>
>> -----Original Message-----
>> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob
>> Stewart
>> Sent: Thursday, October 09, 2014 1:40 PM
>> To: Time Nuts
>> Subject: [time-nuts] Sun Outage
>>
>> Two days this week, there was a 3 or 4 minute outage on DirecTV as the sun
>> aligned with the satellite and my dish.  So I was wondering what kind of
>> effect this has on the GPS system and especially timing receivers.
>>
>>
>> Bob - AE6RV
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