GAPYONG KQEL (S Korea US mil) coords resolve inside North Korea

[mjames-upc]

https://github.com/pmarshwx/stations/blob/master/stations/data/stations.txt#L9991

Also exists in ftp://priede.bf.lu.lv/pub/Faili/Riiki/Nirsoft/2013decembris/stations.txt while KQEL is no longer in http://www.rap.ucar.edu/weather/surface/stations.txt

What's the source? I'm seeing KQEL metars on NOAAport but can't determine the station location.