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Laser Radar Red Shift



For all of you planning on purchasing laser radar interferometers, if 
you are approaching the radar, (or you are the radar being approached) 
the frequency shift (relative to standing still) is to higher 
frequencies.  This is usually called a *blue* shift.  

P.S.  Most laser diodes are insufficiently coherent and frequency 
stable to be used for interferometry.  Timing of pulse round trip time 
differences is much easier.

***                 ...Kirby    (Kirby A. Smith)                 ***
***              ksmith1@mailgw.sanders.lockheed.com             ***
***              [=]    kirby.smith@lmco.com                     ***
***  Opinions expressed herein are entirely those of the author. ***