[Moon-Net] Question to Laser bouncing

[David Tanks]

Some may find this fascinating.

 

73,  David AD4TJ

----- Forwarded Message -----
From: Joe <n...@mwt.net>
To: moon...@mailman.pe1itr.com
Sent: Saturday, May 19, 2012 1:18 PM
Subject: Re: [Moon-Net] Question to Laser bouncing

That would be awesome!

The Apollo astronauts left special reflector panels on the moon that are made exactly for reflecting laser light back,  wiki story
http://en.wikipedia.org/wiki/Lunar_Laser_Ranging_experiment

This would be ultra cool experiment

Joe WB9SBD

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com

On 5/20/2012 11:49 AM, HB9JAW Michel Winiger wrote:

Hi there,
This may be a dummy question.
A friend off mine has built a portable 400W laser at 980nm equal to 
360thz. IR light
It is CW modulated.

Just for my curiosity
Could this on be used for bounce light off the moon?
Would anything be bouncing back?
What kind off receiption would be need?
Has ever anyone tryed this sucsessfully?

73 de Michel
HB9JAW

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[David Tanks]

More laser bouncing info.

 

73,  David AD4TJ

----- Forwarded Message -----
From: Barry VE4MA <ve...@shaw.ca>
To: hb9...@bluewin.ch; moon...@googlegroups.com; moon...@mailman.pe1itr.com
Sent: Saturday, May 19, 2012 3:12 PM
Subject: Re: [Moon-Net] Question to Laser bouncing

There is a lot of information on the Internet....look at
http://physics.ucsd.edu/~tmurphy/apollo/apparatus.html

They are using a pulse (short)laser in the hundreds of MW range but with
only 2.3 W of average power, but have it coupled into a 3.5 m telescope.
Other locations use a 0.7m telescope.  They use short pulses in order to get
very short distance resolution, so a signal would be easier to detect with
2.5 second CW transmissions.

The Apollo 15 retroflector is apparently the best to use but there are many
out there.  Unfortunately they are designed only for direct bounce back
....so no QSOs unless very nearby

I think K3PGP was trying to do optical EME long ago...he has a good website
see http://www.k3pgp.org/lasereme.htm  &
http://www.k3pgp.org/Notebook/Mlrs/mlrs_targets.htm

Best 73
Barry VE4MA

[David Tanks]

More Laser Bouncing info.

 

73,  David AD4TJ

 

----- Forwarded Message -----
From: Patrick Barthelow <apol...@gmail.com>
To: david.g...@bezeqint.net
Cc: moon...@googlegroups.com; moon...@mailman.pe1itr.com
Sent: Saturday, May 19, 2012 9:37 PM
Subject: Re: [Moon-Net] [Moon-net GG] Re: Question to Laser bouncing

Guys:  

I dont know the answer, but here is a rich resource towards an answer.  These guys at Apache Point,  do this kind of stuff for their day jobs:   Good Luck....   Pat

http://en.wikipedia.org/wiki/Apache_Point_Observatory_Lunar_Laser-ranging_Operation 

On Sat, May 19, 2012 at 11:07 AM, David Greenberg <david.g...@bezeqint.net> wrote:

Hi Michel,

Do you have any information regarding the optical system?
What is the beam angle? It is required for link budget calculation.

I assume that we will have to find an optimal modulation technique as well. For that we need to find out what type of laser and driver it has. Is it a pulsed or CW laser?

David 4X1DG

----- Original Message ----- From: "HB9JAW Michel Winiger" <hb9...@bluewin.ch>
To: <moon...@googlegroups.com>; <moon...@mailman.pe1itr.com>
Sent: Sunday, May 20, 2012 7:49 PM

Subject: [Moon-Net] Question to Laser bouncing

Hi there,
This may be a dummy question.
A friend off mine has built a portable 400W laser at 980nm equal to
360thz. IR light
It is CW modulated.

Just for my curiosity
Could this on be used for bounce light off the moon?
Would anything be bouncing back?
What kind off receiption would be need?
Has ever anyone tryed this sucsessfully?

73 de Michel
HB9JAW

--
Best,  73,   Pat Barthelow,  AA6EG  apol...@gmail.com