LONG-WAVE RADIO TELEPHONE TRANSMISSION 



689 



MAGNETIC CHARACTER 



LONG-WAVE FIELDS 



CODE MAGNETIC CHARACTER "C" 



BLANK. 0.0 TO 0.4 



0.5 TO 0.9 

 • I .0 TO 2.0 



FIELD DEVIATION IN DECIBELS 

 -1.4 OR LESS 

 -1.3 TO +1.6 

 + 1.7 OR GREATER 



Fig. 6 — Twenty-seven-day recurrence diagram of magnetic character and deviation 

 of average daylight field of WNL from 50-day moving average. 



