Alpha Radionavigational System

Author: Dr. Stanislav Klimov (I.K.I. - Russian Space Institute).

 

Alpha navigation system include three VLF transmission stations:
Komsomolsk on Amur (KO) 50.60 N, 137.00 E;
Novosibirsk (NO) 55.10 N, 83.00 E;
Krasnodar (KR) 45.00 N, 38.70 E.

Alpha transmit VLF signals at 14.881, 12.649 and 11.905 kHz, each of a duration of 0.4 s in the format

KO 14.881__12.649__11.905______________________
NO 12.649__14.881__14.881__11.905__11.905__11.905
KR _______11.905__12.649_________________14.881
Time, sec 0.2_0.4__0.2_0.4__0.2_0.4__0.2_0.4_0.2_0.4__0.2_0.4

This means if you measure signal at 14.881 kHz, you have the time format
KO 14.881_____________________________________
NO _______14.881__14.881______________________
KR _____________________________________14.881
Time, sec 0.2_0.4__0.2_0.4__0.2_0.4__0.2_0.4_0.2_0.4__0.2_0.4

At 12.649 kHz, you have the time format
KO ________12.649_____________________________
NO 12.649_____________________________________
KR _______________12.649______________________
Time, sec 0.2_0.4__0.2_0.4__0.2_0.4__0.2_0.4_0.2_0.4__0.2_0.4

At 11.905 kHz, you have the time format
KO _______________11.905______________________
NO ______________________11.905__11.905__11.905
KR _______11.905______________________________
Time, sec 0.2_0.4__0.2_0.4__0.2_0.4__0.2_0.4_0.2_0.4__0.2_0.4