23 June 2017

the beauty of grayline

188-141A calls copied this morning around 0455 UTC on 11111.0 KHz/USB (Fig. 1). The ALE addresses  belongs to the French Navy naval bases at overseas departments and territories Papeete and Noumea:
1OMFUM French Navy OMAR Net, Papeete OCE
1OMFUJ French Navy OMAR Net, Noumea NC
more than 16000 Km far from my antenna: reception has been possible thanks to a grayline-path (Fig. 2).

Fig. 1 - decoding
Fig. 2 - the grayline at the reception time

It's interesting to note that, at that same time, exploiting the same grayline path I also had a good copy of CHU Ottawa Canada (Fig. 3).

Fig. 3

Grayline observations and predictions can be read at the VOACAP (Voice of America Coverage Analysis Program) site:
http://www.voacap.com/p2p/index.html
as well as a lot of interesting and accurate services about about HF propagation:
http://www.voacap.com/ 

French Navy OMAR (Organisation MARitime des transmissions haute fréquence) HF New-Generation program have the task to modernize all the High-Frequency transmissions media of about 80 assets of the Ocean forces of the French Navy, maintaining interoperability with other NATO Navy. The project was committed to Thomson-CSF (now THALES):