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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Doppler radar accuracy - RF Cafe Forums

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Jorrie
 Post subject: Doppler radar accuracy
Posted: Sun Jun 25, 2006 9:30 am 
 
Captain

Joined: Tue Jun 13, 2006 4:22 am
Posts: 10
Location: 25.9S 28.1E
If speeds in space one day get up to a significant fraction of the speed of light, the relativistic Doppler radar solution becomes:

(Delta lambda)/lambda = (1+v/c)/(1-v/c) - 1, which reduces to ~2v/c if v is very much smaller than c and v is an 'opening velocity'.

Will someone please tell me the velocity accuracy of good present day Doppler radars? I would like to work out how fast relative velocities in space must become before the error of the radar equals the error of the low-speed approximation (2v/c).







Posted  11/12/2012
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