From: "gfbranden{at}earthlink.net" 
To: salt37{at}juno.com,  gfbranden{at}earthlink.net
Cc: atm{at}shore.net, novac{at}his.com, capitalastronomers{at}yahoogroups.com
Reply-To: "gfbranden{at}earthlink.net" 


Does anybody in the Washington DC area have a known reference flat and a
monochromatic light source?

Wade Duvall and some of his buddies from school have a very, very ambitious
multi-year science fair project that involves making a glider that is
launched from about 50,000 feet from a balloon, and that contains a small
telescope (mounted horizontally) with a diagonal flat mirror so that photos
on the ground (or in the sky) can be taken. I have a couple of flats on
hand, but I don't have a REFERENCE flat, and I have never taken the effort
to make a monochromatic light source. I have seen this done, however, at
the Delmarva MMM #3.

Guy Brandenburg

Original Message:
-----------------
From: Wade Duvall salt37{at}juno.com
Date: Sun, 1 Jun 2003 17:28:22 -0400
To: gfbranden{at}earthlink.net
Subject: Re: 6" Optical Flat


Guy,

What is the size of the optical flat you have. We may not need it because
Marc found a 5" x 7" flat that might work. Next week at mirror
grinding you can test it. Also do you have a 5" mirror?


Wade Duvall
(703) 615-2178
salt37{at}juno.com


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