Pulse type over the horizon, OTH, radar signals around WTWW on 5085 Khz.
WTWW on 5085 Khz with a program about ham radio vendors.
Ham Operators using AM mode on 80m. Very common in and around this portion of the band. These guys pride themselves on their transmit audio.
This is TIS/HAR station WQFG-689 1710 Khz in Hudson County NJ announcing technical difficulties.
NAVTEX Transmission on 518 Khz.
Still not certain what to make of this. It is commonly found in the HF spectrum.
Strong carrier on 5095 KHz from Arecibo P.R. From Chris Fallen @ctfallen Retweeted HAARP_DXing_2017 Improving conditions and change from X to O mode probably help! Still 5.095 MHz O-mode 390 MW net power #Arecibo. This will be an interesting frequency to monitor.
Classic example of a CODAR station (coastal ocean dynamics applications radar). land-based, High Frequency (HF) radar. It was developed between 1973 and 1983 at NOAA’s Wave Propagation Laboratory in Boulder, Colorado. CODAR is a noninvasive system that permits to measure and map near-surface ocean currents in coastal waters. It is transportable and offers output ocean current maps on site in near real time. Moreover, using CODAR it is possible to measure waves heights and it provides an indirect estimate of local wind direction.
Some of you have been asking if the “Mystery Signal” is still on the air. Yes it is! Here is a recent clip of it mixed with some CODAR. I’m also trying out SDRUNO software for the very first time. Recorded on May 24, 2017 around 0445 UTC using my SDR PLAY RSP1 attached to my OCF dipole at 35′.