JORN – Australia

JORN_HF

Jindalee Operational Radar Network JORN is of Australian origin. It mostly comprises of 16 blocks, FMCW-modulated and each separated by a tone of ∼195 milliseconds length at carrier frequency, with the last one measuring to ∼435 milliseconds. The audio clip has been received in USB at -2kHz offset, resulting in a carrier tone 2.036 Hz.

JORN_HF_1

Above you see the blocks with the following sequence of ∼length [milliseconds ms]/frequency [Hz]:

  1. 618 ms/10,45 Hz
  2. 667,3 ms/9,66 Hz
  3. 791,4 ms/8,1 Hz
  4. 833 ms/7,5 Hz
  5. 888 ms/7,25 Hz
  6. 998 ms/6,17 Hz
  7. 1.230 ms/5,79 Hz
  8. 1.385 ms/5,22 Hz
  9. 1.387,6 ms/4,63 Hz
  10. 1.577,4 ms/4,07 Hz
  11. 1.847,2 ms/3,47 Hz
  12. 2.215,9 ms/2,9 Hz
  13. 2.766 ms/2,3 Hz
  14. 3.990 ms/1,6 Hz
  15. 6.296 ms/1,0 Hz
  16. 15.925,5 ms/0,4 Hz