The Nexrad Blink Comparator alternately superimposes storm-relative radial velocity scans and reflectivity scans. Velocity couplets associated with high reflectivity cores are more easily identified using this technique.  
  Enter the three-charactor station id (i.e. KDIX = DIX.) Input is case-sensitive--use all-CAPS. (The Radar Site ID list below can be used to find the station ID.)

Select Station  		 
 

Name:

 
 
Radar ID's by Site
 Radar ID's by State
  
   
  About Nexrad Blink Comparator  

 

A blink comparator is a device which alternately superimposes two images, which can cause differences between the images to become more apparent to the observer. In 1930, Clyde Tombaugh used a blink comparator to discover the planet (now planetoid) Pluto. Using two images of the same sector of sky, taken a few months apart, he noticed that Pluto's image moved relative to the background of virtually-stationary stars. Read more about the discovery of Pluto here.

  
  With the advent of digital imaging, the blink comparator has found medical imaging applications and can be used to detect lesions (for example) that developed between the times two images were acquired.  
 

Resources used to prepare Nexrad Blink Comparator
NOAA Ridge Radar: Images & Select Station HTML code
AniS Animations
Programming Perl, Third Edition, By Larry Wall, Tom Christiansen, Jon Orwant