Re: Low-elevation skymapping at 2.45 Ghz

2004-06-16 Thread Morlock Elloi
> However, it should be known that fiberglass (eg van) panels are > transparent > to uwaves AFAIK and that a van with soft tires is a 0th-order 0.25" glass will cost you 2-2.5 dB. > At sufficiently good mechanical stabilization and gain, you will > encounter perhaps The best way to do this is to

Re: Low-elevation skymapping at 2.45 Ghz

2004-06-16 Thread Major Variola (ret)
At 06:03 PM 6/16/04 +0200, Eugen Leitl wrote: >Aperture is tiny (and expensive, exponentially so). Visible wavelength vs. >microwave is a >complete overkill in terms of mirror precision (lambda/10..100). Exactly. I wasn't suggesting using the optical reflector (front surface Al over glass) but ra

Re: Low-elevation skymapping at 2.45 Ghz

2004-06-16 Thread Eugen Leitl
On Wed, Jun 16, 2004 at 10:50:34AM -0400, Tyler Durden wrote: > Do optical mirrors still work in the microwave regime? I have no idea. Aperture is tiny (and expensive, exponentially so). Visible wavelength vs. microwave is a complete overkill in terms of mirror precision (lambda/10..100). Depend

RE: Low-elevation skymapping at 2.45 Ghz

2004-06-16 Thread Tyler Durden
Do optical mirrors still work in the microwave regime? I have no idea. -TD From: "Major Variola (ret)" <[EMAIL PROTECTED]> To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> Subject: Low-elevation skymapping at 2.45 Ghz Date: Tue, 15 Jun 2004 15:09:26 -0700 Telescopes a