INTERSECTION ANGLE 

 40° 



< 



K 



\ 



-IOM>^^IOM 

 / 



/ 



R 



10 M 



+ 10 METERS 



K 



INTERSECTION ANGLE INTERSECTION ANGLE 

 90° 120° 



FIGURE VI-3 POSITION UNCERTAINTY DUE TO RANDOM ERRORS 



c ■ Range 



The range of the equipment can be accurately computed from: 



R = k 



{\ ^ {S 



(1) 



where 



R - range in statute miles 



h = height of transmitting and receiving antennas 



k == a constant between 1 .8 and 2 



The constant k has been determined from experience and can be ap- 

 plied for all practical purposes where the distances do not exceed 100 miles 

 and the antenna heights do not exceed 2, 000 feet. 



160 



arthur ai.lCittlcJnr. 



