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1994-04-27 - Re: CU Crypto Session Sat

Header Data

From: Paul Schauble <pls@crl.com>
To: Phil Karn <karn@qualcomm.com>
Message Hash: cf8b67253101148378c08c485cc7ae9085c95e423435b543e88b4a4b09db86b0
Message ID: <Pine.3.87.9404261938.A174-0100000@crl.crl.com>
Reply To: <199404260839.BAA28964@servo.qualcomm.com>
UTC Datetime: 1994-04-27 03:01:00 UTC
Raw Date: Tue, 26 Apr 94 20:01:00 PDT

Raw message

From: Paul Schauble <pls@crl.com>
Date: Tue, 26 Apr 94 20:01:00 PDT
To: Phil Karn <karn@qualcomm.com>
Subject: Re: CU Crypto Session Sat
In-Reply-To: <199404260839.BAA28964@servo.qualcomm.com>
Message-ID: <Pine.3.87.9404261938.A174-0100000@crl.crl.com>
MIME-Version: 1.0
Content-Type: text/plain




On Tue, 26 Apr 1994, Phil Karn wrote:

> Some time ago I worked out the theoretical limits on spy satellite
> resolution.  It's a simple exercise in optics, if you make optimistic
> assumptions like no atmospheric distortion, etc. My only major
> engineering assumption was that the objective mirror had to fit inside
> the payload fairing of a Titan launcher, i.e., about 2 meters max. The
> result, at visible wavelengths and for the slant ranges typical of spy
> satellite orbits, was about 1 foot. This was completely consistent
> with the leaked KH-11 photos of the Soviet aircraft carrier published
> some time back in AW&ST and Deep Black.  Good, but not exactly good
> enough to read poker hands, I would say.
> 
What do you get if you assume the largest mirror that can fit in the 
shuttle cargo bay?

   ++PLS

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