490 



AUTOMATIC TRACKING CIRCUITS 



made larger, somewhat less accurate components might be used or the track 

 loop bandwidth could be reduced. This illustrates the compromises that 

 have to be made between the interrelated tracking loop design parameters. 



Bias Errors. As shown in Fig. 9-7, the bias error ebp is calculated 

 approximately, again -using a truncated error series. A third term is 



Fig. 9-7 Antenna Position Error Calculations. 

 POSITION ERROR COMPONENTS 



CALCULATIONS 



Assumed Values 



/ = 20 



coc = 6.28 rad/sec 

 A' = 3.0 



r = 1.0 



L = 30 yd 

 arr < 0.1057channel 



& — 1.05 °/sec ] Course conditions 

 6 = 0A3 7sec2 of Fig. 2-44. 

 "d = 0.0246 7sec^ Time^to go: 10 sec 

 R = 5500 yd J 



ec = 1.5 mils or 0.086° 

 ?.„ = to be found 



