Body
Hi Smokey,
To elaborate:
When designing terrestrial back hauls and such one uses the free space
path loss variable to determine how much gain is required to overcome
distance and the theoretical performance of a receiver.
Free space path loss is used to compute attenuation of an RF emitter
based on the spread of the signal from source same as the inverse square
law.
Then one can convert the db to dbw and determine watts of input on the
transmitter side.
There are events such as atmospheric skip and such where sometimes
nature helps the RF signals propagate beyond the norm, but for normal
reliable communications FSPL is a required input for the solution.
In the case of the moon FSPL would indicate the requirement for millions
of watts of power to create the gain necessary of around 140 db.
As for the reflectors I believe them to be there but have no first hand
proof of same. I also believe humans went to the moon using something
other than rockets. I do not believe in any way shape or form human
beings went to the moon with oxidating kerosene rockets of limited fuel
using unproven beta technology and made it there and back 6 times no one
lost no deaths with 60s tech, just preposterous. Statistics alone not
accounting for many of the other issues that I and others already raised.
I am sorry if my questioning of reality upsets some people as I am not
detracting from the bravery of the astronauts as I think they were duped
and blackmailed based on the cold war with USSR at the time. One can
easily determine from their facial and body language at the news
conference something is definitely not right at all.
On 6/6/2018 5:58 PM, David G Dawson [email protected] [EVGRAY] wrote:
>
>
> Hello Mick,
> Ex RF NASA CDSCC Tidbinbilla Australia - 14 years.
> CDSCC - Canberra Deep Space Communications Centre.
> I read your question but fail to understand can you please elaborate
> on the problem.
> The Deep Space Network (DSN) used small Dish Antennas for Moon Bounce
> but am unsure of the Transmitter ouput power but will search for the
> answer.
> Have attached the size Dish we used.
> Also, the DSN is now using a new antenna technology which is, instead
> of the Cone in the middle, is using a resonant cavity (Beam Waveguide)
> and these are now installed at Tidbinbilla DSS 34.
>
> https://www.cdscc.nasa.gov/Pages/antennas.html
>
> Wish to thank you all for your attention to this dialogue as you are
> all showing that we did go to the Moon as who was it then that set up
> the Laser Radar Reflectors on the Moon that all the Ham Radio Amateurs
> are now using for Moon Bounce since 1969?
>
> https://en.wikipedia.org/wiki/Lunar_Laser_Ranging_experiment
>
> I was sent to Parkes 64 meter Observatory antenna (Movie - 'The Dish')
> in late 1972 as we were prime for Apollo 17 video and was actually
> sitting in the control room while the download video was being
> recorded and viewed on a TV on the console.
> Tidbinbilla 64m and Honeysuckle Creek 32m were prime and standby in
> Australia for all of the Spacecarft control sequences at the same time.
> The pictures attached are as recent as October 2017 as these are from
> my own camera.
> The Moon Bounce antenna shown was sited on the roof of the main
> building but has since been replaced but this one has a diameter of
> about 4'.
> I await more information and hope this will help.
>
> Smokey
>
> On 7/06/2018 2:19 AM, [email protected] [EVGRAY] wrote:
>>
>>
>> https://www.electronics-notes.com/articles/ham_radio/amateur-propagation/moonbounce-propagation-eme.php
>>
>> Here is a link for ham radio folk about EME or moonbounce radio. The
>> path loss in best case scenarios is very high.
>>
>>
>> Can someone who knows more RF electronics theory such as Ole or
>> Hector please comment as to how this is overcome with 1000 watt input
>> transmitter when the maximum theoretical S/N ratio and 252 db PL
>> should require transmitters larger than AM radio stations.
>>
>>
>> I must be missing something. Also checking the amateur radio sites
>> for an answer.
>>
>>
>>
>> Thanks,
>>
>> Mick
>>
>>
>>
>
>