Arecibo shutdown...

[Rick C]

On Tuesday, December 1, 2020 at 1:13:25 PM UTC-5, Jan Panteltje wrote:

I have been wondering ever since they called it beyond repair
if it would not be possible to (and I think that is all there is you need at the focus point) put
the LNA (and cooling I presume) in a drone and have it hover using differential GPS in the exact position.
I have tried that with my drone, powered by 100 kHz few hundred volt via thin coax indefinitely.
Would not cost shit and can be setup in no time.
http://www.panteltje.com/pub/h501s_drone_remote_power_flight_test_1_IMG_6274.JPG
Note the thin coax from the drone over the fence to ground control
http://www.panteltje.com/pub/h501s_drone_remote_power_test_ground_control_1_IMG_6276.JPG
At several hundred volt current is low and you can use the same coax for the signal too.
The idea in my case was to get a long vertical antenna up, or a small 70 cm one.

I really do not see the use of hanging a whole house over a dish.

Yes, you do not see.

\"the unique beam-steering mechanism suspended high above the reflector dish allowed for a moveable focal point that could aim at different parts of the sky.\"

It wouldn\'t be of much use with a fixed reflector to only look at the tiny portion of the sky it ends up being pointed at as the earth revolves and wobbles.

Accuracy with differential GPS is within some centimeters, but of course you could use lasers etc
and even cameras for position control.
Kids stuff.

Sure, kid stuff! I can\'t imagine why no one has done it.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

 

[DJ Delorie]

Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> writes:
> I really do not see the use of hanging a whole house over a dish.

You do realize that dish is a *transmitter* too, right? How much
transmitting power can your drone carry?

Also, depending on frequency, the transmitting/receiving antenna in the
\"house\" might have a minimum size. How big is your drone again?

How much fuel does it take to hover a Sikorski Skycrane and payload in
one spot for days on end?

 

[server]

On Thu, 19 Nov 2020 22:56:03 GMT, Steve Wilson <spam@me.com> wrote:

Arecibo has reached EOL.

https://arstechnica.com/science/2020/11/famed-arecibo-observatory-to-be-
decommissioned-in-wake-of-cable-breaks/

It just broke.

https://www.bbc.com/news/world-us-canada-55147973



--

John Larkin Highland Technology, Inc

The best designs are necessarily accidental.

 

[Steve Wilson]

jlarkin@highlandsniptechnology.com wrote:

On Thu, 19 Nov 2020 22:56:03 GMT, Steve Wilson <spam@me.com> wrote:

Arecibo has reached EOL.

https://arstechnica.com/science/2020/11/famed-arecibo-observatory-to-be-
decommissioned-in-wake-of-cable-breaks/

It just broke.

https://www.bbc.com/news/world-us-canada-55147973

Frightening prospect to put 900 tons in the air suspended by cables then
cut the funds needed for maintenance.


--
Science teaches us to trust. - sw

 

[Steve Wilson]

Steve Wilson <spam@me.com> wrote:

jlarkin@highlandsniptechnology.com wrote:

On Thu, 19 Nov 2020 22:56:03 GMT, Steve Wilson <spam@me.com> wrote:

Arecibo has reached EOL.

https://arstechnica.com/science/2020/11/famed-arecibo-observatory-to-
be- decommissioned-in-wake-of-cable-breaks/

It just broke.

https://www.bbc.com/news/world-us-canada-55147973

Frightening prospect to put 900 tons in the air suspended by cables
then cut the funds needed for maintenance.

Scott Manley has a brief description:

Arecibo Radio Telescope Collapses!
https://www.youtube.com/watch?v=vchDbyIRP44

Aricebo appeared in the movies:

GoldenEye - The Dish
https://www.youtube.com/watch?v=6HFkF8904Uw

(be prepared for some exaggeration)



--
Science teaches us to trust. - sw

 

[Martin Brown]

On 01/12/2020 18:10, Jan Panteltje wrote:

On a sunny day (Tue, 1 Dec 2020 16:56:36 +0000) it happened Martin Brown
\'\'\'newspam\'\'\'@nonad.co.uk> wrote in <rq5sk3$1r73$1@gioia.aioe.org>:

On 20/11/2020 11:33, Steve Wilson wrote:
Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

It is a shame to lose a grand old instrument even if it could only
look at a fraction of the sky around the zenith it was a *very* big
dish.

+1. Thanks

Sadly it has just got a whole lot worse.

The feed gantry fell to the ground overnight smashing the big dish and
it is now just a heap of rubble and twisted metal.

Dust still in the air in these recent Twitter images from the site.

https://twitter.com/JohnMoralesNBC6/status/1333753977196994560?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Etweet

and

https://twitter.com/DeborahTiempo

A very sad end to major radio telescope.

I have been wondering ever since they called it beyond repair
if it would not be possible to (and I think that is all there is you need at the focus point) put
the LNA (and cooling I presume) in a drone and have it hover using differential GPS in the exact position.
I have tried that with my drone, powered by 100 kHz few hundred volt via thin coax indefinitely.
Would not cost shit and can be setup in no time.

The signal level for a radio telescope is so tiny that you need total
radio quiet for some considerable distance around it. Any transmitter
pointing into the dish would blind it. They even put mesh on parts of
the ground to prevent the warm Earth from degrading the signal to noise.

I doubt your drone would be able to carry the feed cables or high power
pulse transmitter and certainly not the secondary and tertiary reflectors.

It is a fair bit more complicated than it looks. That radome hides a lot
of intricate equipment and a very high power pulse transmitter.

https://geodetic.com/wp-content/uploads/2018/08/CMSC2001_Final.pdf

If you are interesting in more details search \"arecibo egg frequencies\".

Their website is denying me access but the google summary paragraphs
contain most of the specifications of the instrument anyway.

http://www.panteltje.com/pub/h501s_drone_remote_power_flight_test_1_IMG_6274.JPG
Note the thin coax from the drone over the fence to ground control
http://www.panteltje.com/pub/h501s_drone_remote_power_test_ground_control_1_IMG_6276.JPG
At several hundred volt current is low and you can use the same coax for the signal too.
The idea in my case was to get a long vertical antenna up, or a small 70 cm one.

I really do not see the use of hanging a whole house over a dish.

It allows you to use the telescope for radar ranging. Almost all of the
biggest dishes have something the size of a hut at the prime focus it
allows the electronic engineers to work there without having to be
professional mountaineers (although some of them are hobby
mountaineers!). It is one hell of a long way down and a sheer drop!

Accuracy with differential GPS is within some centimeters, but of course you could use lasers etc
and even cameras for position control.
Kids stuff.
It is a nice dish, old brains there?

They could operate at up to 8GHz you do the sums (3GHz was more common).
The dish surface figure after its second face lift was good to 2mm.

I\'m not sure how they compensated for wind loading and thermal cable
stretch on the support gantry position but since it obviously worked
they must have been able to do it. Lateral motion doesn\'t hurt so much.

--
Regards,
Martin Brown

 

[Jan Panteltje]

On a sunny day (Tue, 01 Dec 2020 16:24:40 -0500) it happened DJ Delorie
<dj@delorie.com> wrote in <xnr1o91ap3.fsf@delorie.com>:

Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> writes:
I really do not see the use of hanging a whole house over a dish.

You do realize that dish is a *transmitter* too, right? How much
transmitting power can your drone carry?

Also, depending on frequency, the transmitting/receiving antenna in the
\"house\" might have a minimum size. How big is your drone again?

How much fuel does it take to hover a Sikorski Skycrane and payload in
one spot for days on end?

Yes, transmitter, never thought about that,
for sure you do not want to transmit trump\'s tweets to alien civilizations..

As to the carrying capability of modern drones, I think that is not much of a problem.
The problem is more in the fact that the Arebico thing is a nineteenth century
project.
With a bit of tinkering and what we can do now, you could still make good use of that big dish.
It can all be solved, nice student project: cost peanuts.
Na sayers we do not need.

Power? we live in a world of green idiots where a 16 year old who likely cannot connect a light bulb
misguides the world as a pawn in the game of the ever selling more windmills of your mind
while we all know we need nuculear plants really.

;-(

But back to reality, nice student project, can be done.
Get some traveling wave amplifier from ebay for a transmit test,
Power is no problem, no RF communication if you have RFI fear, the 2.4 GHz modules can be swapped out
simply you can go optical, bit of tinfoil has worked for many
Space if full of satellites that cover large part of the world with a little bit of solar power.
Just DO it!
Maybe there are political reasons to destroy Arebico? Seems to me
they could have fixed those cables years ago?

Also, a while ago I was looking of optical power upload, and found
some high power stuff (google).

It can all be solved.

\'Merrica? I did read that China now also has a very nice big dish.

 

[Jan Panteltje]

On a sunny day (Tue, 1 Dec 2020 13:06:09 -0800 (PST)) it happened Rick C
<gnuarm.deletethisbit@gmail.com> wrote in
<b8fcfb74-c92a-4294-bd17-38ed995aff52n@googlegroups.com>:

\"the unique beam-steering mechanism suspended high above the reflector dish allowed for a moveable focal point that could aim at
different parts of the sky.\"

That is EXACTLY what the drone gives you


>Sure, kid stuff! I can\'t imagine why no one has done it.

nineteenth century thinking likely.

 

[Jan Panteltje]

On a sunny day (Tue, 01 Dec 2020 15:57:35 -0500) it happened legg
<legg@nospam.magma.ca> wrote in <scbdsf9mspikb9q4eciiac8jvkun51im4n@4ax.com>:

On Thu, 19 Nov 2020 22:56:03 GMT, Steve Wilson <spam@me.com> wrote:

Arecibo has reached EOL.

https://arstechnica.com/science/2020/11/famed-arecibo-observatory-to-be-
decommissioned-in-wake-of-cable-breaks/

Arecibo workers seem rather lackadaisical about it all.

Why is nobody shouting \'incompetent gits\'?

Was there no maintenance budget?

Didn\'t an alarm go off after the first stress failure?

RL

Good point!
I did read they had 3 companies evaluate the structure,
2 said beyond repair.
Majority rule and science...
Politics and science do not always mix well.

 

[Jan Panteltje]

On a sunny day (Wed, 2 Dec 2020 09:19:04 +0000) it happened Martin Brown
<\'\'\'newspam\'\'\'@nonad.co.uk> wrote in <rq7m68$gn$1@gioia.aioe.org>:

On 01/12/2020 18:10, Jan Panteltje wrote:
On a sunny day (Tue, 1 Dec 2020 16:56:36 +0000) it happened Martin Brown
\'\'\'newspam\'\'\'@nonad.co.uk> wrote in <rq5sk3$1r73$1@gioia.aioe.org>:

On 20/11/2020 11:33, Steve Wilson wrote:
Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

It is a shame to lose a grand old instrument even if it could only
look at a fraction of the sky around the zenith it was a *very* big
dish.

+1. Thanks

Sadly it has just got a whole lot worse.

The feed gantry fell to the ground overnight smashing the big dish and
it is now just a heap of rubble and twisted metal.

Dust still in the air in these recent Twitter images from the site.

https://twitter.com/JohnMoralesNBC6/status/1333753977196994560?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Etweet

and

https://twitter.com/DeborahTiempo

A very sad end to major radio telescope.

I have been wondering ever since they called it beyond repair
if it would not be possible to (and I think that is all there is you need at the focus point) put
the LNA (and cooling I presume) in a drone and have it hover using differential GPS in the exact position.
I have tried that with my drone, powered by 100 kHz few hundred volt via thin coax indefinitely.
Would not cost shit and can be setup in no time.

The signal level for a radio telescope is so tiny that you need total
radio quiet for some considerable distance around it. Any transmitter
pointing into the dish would blind it. They even put mesh on parts of
the ground to prevent the warm Earth from degrading the signal to noise.

I doubt your drone would be able to carry the feed cables or high power
pulse transmitter and certainly not the secondary and tertiary reflectors.

It is a fair bit more complicated than it looks. That radome hides a lot
of intricate equipment and a very high power pulse transmitter.

https://geodetic.com/wp-content/uploads/2018/08/CMSC2001_Final.pdf

If you are interesting in more details search \"arecibo egg frequencies\".

Their website is denying me access but the google summary paragraphs
contain most of the specifications of the instrument anyway.

http://www.panteltje.com/pub/h501s_drone_remote_power_flight_test_1_IMG_6274.JPG
Note the thin coax from the drone over the fence to ground control
http://www.panteltje.com/pub/h501s_drone_remote_power_test_ground_control_1_IMG_6276.JPG
At several hundred volt current is low and you can use the same coax for the signal too.
The idea in my case was to get a long vertical antenna up, or a small 70 cm one.

I really do not see the use of hanging a whole house over a dish.

It allows you to use the telescope for radar ranging. Almost all of the
biggest dishes have something the size of a hut at the prime focus it
allows the electronic engineers to work there without having to be
professional mountaineers (although some of them are hobby
mountaineers!). It is one hell of a long way down and a sheer drop!

Accuracy with differential GPS is within some centimeters, but of course you could use lasers etc
and even cameras for position control.
Kids stuff.
It is a nice dish, old brains there?

They could operate at up to 8GHz you do the sums (3GHz was more common).
The dish surface figure after its second face lift was good to 2mm.

I\'m not sure how they compensated for wind loading and thermal cable
stretch on the support gantry position but since it obviously worked
they must have been able to do it. Lateral motion doesn\'t hurt so much.

OK
thank you, good info.
But does not seem unsolveable to me with a drone.
Sure in high windloads drone is likely out.
But from an other POV if they just leave the thing as scrap metal now you have nothing.
Drone is also safer for those poor techncians, 2 drones, one for backup.

 

[Martin Brown]

On 01/12/2020 21:06, Rick C wrote:

On Tuesday, December 1, 2020 at 1:13:25 PM UTC-5, Jan Panteltje
wrote:
I have been wondering ever since they called it beyond repair if it
would not be possible to (and I think that is all there is you need
at the focus point) put the LNA (and cooling I presume) in a drone
and have it hover using differential GPS in the exact position. I
have tried that with my drone, powered by 100 kHz few hundred volt
via thin coax indefinitely. Would not cost shit and can be setup in
no time.
http://www.panteltje.com/pub/h501s_drone_remote_power_flight_test_1_IMG_6274.JPG


Note the thin coax from the drone over the fence to ground control
http://www.panteltje.com/pub/h501s_drone_remote_power_test_ground_control_1_IMG_6276.JPG

At several hundred volt current is low and you can use the same coax for
the signal too.

The idea in my case was to get a long vertical antenna up, or a
small 70 cm one.

I really do not see the use of hanging a whole house over a dish.

Yes, you do not see.

\"the unique beam-steering mechanism suspended high above the
reflector dish allowed for a moveable focal point that could aim at
different parts of the sky.\"

Crucially this means it can track an object as the Earth rotates whilst
it pings radar pulses off its target.

It wouldn\'t be of much use with a fixed reflector to only look at the
tiny portion of the sky it ends up being pointed at as the earth
revolves and wobbles.

Drift instruments have been built that can only observe objects as they
transit the meridian or more restrictive still zenith.

Classical precision timekeeping started out that way at the Royal
Greenwich Observatory. In radio astronomy the 4C Cambridge catalogue of
radio sources was compiled by a drift instrument consisting of two
parabolic trough reflectors forming an interferometer. The fixed one
still survives although it is a bit threadbare now. Pictures are pretty.

https://adamxphotos.com/2017/07/04/explore-187-mullard-radio-astronomy-observatory-cambridge-june-2016/

OMT is far left, Half mile telescope in the distance (both on a *very*
wide gauge railway track precisely running E-W and the remains of the
parabolic skeleton of the former drift telescope is on the right.

Canada has a mercury mirror based optical drift scope in service today.

https://astro-canada.ca/l_observatoire_a_miroir_liquide_de_l_universite_de_la_colombie_britannique-the_university_of_british_columbia_liquid_mirror_observatory-eng

Accuracy with differential GPS is within some centimeters, but of
course you could use lasers etc and even cameras for position
control. Kids stuff.

Sure, kid stuff! I can\'t imagine why no one has done it.

All the radio telescopes in the world are operated very close to the
bleeding edge of what is technologically possible at the time. The deep
sky network ones for communications with probes are more conservative.

--
Regards,
Martin Brown

 

[Martin Brown]

On 02/12/2020 09:35, Jan Panteltje wrote:

On a sunny day (Wed, 2 Dec 2020 09:19:04 +0000) it happened Martin Brown
\'\'\'newspam\'\'\'@nonad.co.uk> wrote in <rq7m68$gn$1@gioia.aioe.org>:

Accuracy with differential GPS is within some centimeters, but of course you could use lasers etc
and even cameras for position control.
Kids stuff.
It is a nice dish, old brains there?

They could operate at up to 8GHz you do the sums (3GHz was more common).
The dish surface figure after its second face lift was good to 2mm.

I\'m not sure how they compensated for wind loading and thermal cable
stretch on the support gantry position but since it obviously worked
they must have been able to do it. Lateral motion doesn\'t hurt so much.

OK
thank you, good info.
But does not seem unsolveable to me with a drone.
Sure in high windloads drone is likely out.
But from an other POV if they just leave the thing as scrap metal now you have nothing.
Drone is also safer for those poor techncians, 2 drones, one for backup.

Sadly I think after this collapse you basically have nothing. It
probably isn\'t worth rebuilding again after this massive setback.

It will leave us a bit blind to near Earth asteroids but there is a very
low probability of a catastrophic Deep Impact event. There are plenty of
optical survey instruments looking as well - unfortunately they are also
about to be blinded by Musk\'s satellite internet constellations.

https://www.space.com/satellite-megaconstellation-impact-astronomy-report.html

--
Regards,
Martin Brown

 

[Rick C]

On Wednesday, December 2, 2020 at 4:24:31 AM UTC-5, Jan Panteltje wrote:

On a sunny day (Tue, 1 Dec 2020 13:06:09 -0800 (PST)) it happened Rick C
gnuarm.del...@gmail.com> wrote in
b8fcfb74-c92a-4294...@googlegroups.com>:
\"the unique beam-steering mechanism suspended high above the reflector dish allowed for a moveable focal point that could aim at
different parts of the sky.\"
That is EXACTLY what the drone gives you

You don\'t actually know anything about it. You have no idea if the drone would be even remotely useful.

If it was a simple matter of moving the receiving portion of the antenna, they would not have constructed such an elaborate apparatus.

--

Rick C.

+ Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209

 

[legg]

On Wed, 02 Dec 2020 09:25:24 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

On a sunny day (Tue, 01 Dec 2020 15:57:35 -0500) it happened legg
legg@nospam.magma.ca> wrote in <scbdsf9mspikb9q4eciiac8jvkun51im4n@4ax.com>:

On Thu, 19 Nov 2020 22:56:03 GMT, Steve Wilson <spam@me.com> wrote:

Arecibo has reached EOL.

https://arstechnica.com/science/2020/11/famed-arecibo-observatory-to-be-
decommissioned-in-wake-of-cable-breaks/

Arecibo workers seem rather lackadaisical about it all.

Why is nobody shouting \'incompetent gits\'?

Was there no maintenance budget?

Didn\'t an alarm go off after the first stress failure?

RL

Good point!
I did read they had 3 companies evaluate the structure,
2 said beyond repair.
Majority rule and science...
Politics and science do not always mix well.

It was administrated by the University of Central Florida.
After the first incident their evaluators said it could
continue functioning - but no repair notice was given.

After the second incident the advice became \'too dangerous
to attempt repair.

You don\'t get a third notice. It collapsed on Tuesday.

RL

 

[legg]

On Wed, 02 Dec 2020 09:25:24 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

On a sunny day (Tue, 01 Dec 2020 15:57:35 -0500) it happened legg
legg@nospam.magma.ca> wrote in <scbdsf9mspikb9q4eciiac8jvkun51im4n@4ax.com>:

On Thu, 19 Nov 2020 22:56:03 GMT, Steve Wilson <spam@me.com> wrote:

Arecibo has reached EOL.

https://arstechnica.com/science/2020/11/famed-arecibo-observatory-to-be-
decommissioned-in-wake-of-cable-breaks/

Arecibo workers seem rather lackadaisical about it all.

Why is nobody shouting \'incompetent gits\'?

Was there no maintenance budget?

Didn\'t an alarm go off after the first stress failure?

RL

Good point!
I did read they had 3 companies evaluate the structure,
2 said beyond repair.
Majority rule and science...
Politics and science do not always mix well.

I wonder how many other expensive toys the Univ of Central
Florida is currently abusing - and what others they may be
planning to acquire, with their twisted priorities?

RL

 

[Martin Brown]

On 02/12/2020 14:13, Rick C wrote:

On Wednesday, December 2, 2020 at 4:24:31 AM UTC-5, Jan Panteltje
wrote:
On a sunny day (Tue, 1 Dec 2020 13:06:09 -0800 (PST)) it happened
Rick C <gnuarm.del...@gmail.com> wrote in
b8fcfb74-c92a-4294...@googlegroups.com>:
\"the unique beam-steering mechanism suspended high above the
reflector dish allowed for a moveable focal point that could aim
at different parts of the sky.\"
That is EXACTLY what the drone gives you

You don\'t actually know anything about it. You have no idea if the
drone would be even remotely useful.

If it was a simple matter of moving the receiving portion of the
antenna, they would not have constructed such an elaborate
apparatus.

Conceptually it is just a simple matter of moving the feed horn so that
it stays at the focus of the object that they are tracking in the sky.

In practice that requires a 3 point suspension and some quite cunning
mathematics to make it happen smoothly and accurately. They are aiming
to maintain phase lock to a fraction of a wavelength.

As built originally it was designed for 430MHz. By the end of its life
and after a great deal of refiguring it was being operated up to 10GHz.

--
Regards,
Martin Brown

 

[whit3rd]

On Tuesday, December 1, 2020 at 8:56:45 AM UTC-8, Martin Brown wrote:

On 20/11/2020 11:33, Steve Wilson wrote:

The feed gantry fell to the ground overnight smashing the big dish and
it is now just a heap of rubble and twisted metal.

Dust still in the air...
A very sad end to major radio telescope.

Well, maybe not completely. The \'big dish\' is a valley full of reflector elements,
and 90% of those are untouched. It is possible, with a little effort, to clear away the
debris and rebuild the dish. More expensive, would be to replace the mobile
structure overhead. But, that structure might be engineered differently nowadays,
from the way it was done back in the vacuum-tube era, so maybe the task of rebuild
is less expensive than repair would have been.

 

[Jan Panteltje]

On a sunny day (Thu, 3 Dec 2020 09:14:21 -0800 (PST)) it happened Rick C
<gnuarm.deletethisbit@gmail.com> wrote in
<b85f87ae-d9e3-4066-8bbb-7344eaf67142n@googlegroups.com>:

You may know lots about drones, but you seem to not know much about beam forming.
Since I designed my first video camera in 1967-1968 and that involves optics
and making a beam is no different for light or lower frequency EM radiation
I call your expertise on that bluff.

\"No different\" conceptually, but the practical differences make using a drone at Arecibo an absurd idea. Did your experience
teach you anything about practicality?

I don\'t get why you are continuing to support your clearly absurd suggestion.

humans could not fly as those were heavier than air as opposed to birds that were clearly lighter than air,
You better address the solutions and not your vague illusions of what you think the problem is.
For the rest arguing with na sayers and trolls is a waste of time
I see I already had you in the kill file, but you changed name again.
plonk

 

[Rick C]

On Thursday, December 3, 2020 at 1:41:10 PM UTC-5, Jan Panteltje wrote:

On a sunny day (Thu, 3 Dec 2020 09:14:21 -0800 (PST)) it happened Rick C
gnuarm.del...@gmail.com> wrote in
b85f87ae-d9e3-4066...@googlegroups.com>:

You may know lots about drones, but you seem to not know much about beam forming.
Since I designed my first video camera in 1967-1968 and that involves optics
and making a beam is no different for light or lower frequency EM radiation
I call your expertise on that bluff.

\"No different\" conceptually, but the practical differences make using a drone at Arecibo an absurd idea. Did your experience
teach you anything about practicality?

I don\'t get why you are continuing to support your clearly absurd suggestion.
humans could not fly as those were heavier than air as opposed to birds that were clearly lighter than air,
You better address the solutions and not your vague illusions of what you think the problem is.
For the rest arguing with na sayers and trolls is a waste of time
I see I already had you in the kill file, but you changed name again.
plonk

And yet you felt the need to share. Thank you for sharing.

Rather that display your emotions, you could just discuss the facts. The bottom line is you can\'t realistically suspend the receiving elements of the Arecibo antenna using a drone. This is not remotely like a light beam or other EM phenomena because of practical issues. Theory and practice are the same in theory. In practice they differ considerably.

--

Rick C.

--- Get 1,000 miles of free Supercharging
--- Tesla referral code - https://ts.la/richard11209

 

[Steve Wilson]

Steve Wilson <spam@me.com> wrote:

Steve Wilson <spam@me.com> wrote:

jlarkin@highlandsniptechnology.com wrote:

On Thu, 19 Nov 2020 22:56:03 GMT, Steve Wilson <spam@me.com> wrote:

Arecibo has reached EOL.

https://arstechnica.com/science/2020/11/famed-arecibo-observatory-to
- be- decommissioned-in-wake-of-cable-breaks/

It just broke.

https://www.bbc.com/news/world-us-canada-55147973

Frightening prospect to put 900 tons in the air suspended by cables
then cut the funds needed for maintenance.

Scott Manley has a brief description:

Arecibo Radio Telescope Collapses!
https://www.youtube.com/watch?v=vchDbyIRP44

Aricebo appeared in the movies:

GoldenEye - The Dish
https://www.youtube.com/watch?v=6HFkF8904Uw

(be prepared for some exaggeration)

Watch the Arecibo Observatory\'s catastrophic collapse
1:57
https://www.youtube.com/watch?v=u34uwFOCM-4



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Science teaches us to trust. - sw