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′.
This is Santa Maria in the Azores working aircraft with frequency info and SELCAL.
This video is a bit different from my others. It is of a vintage Realistic DX-300 shortwave receiver, which was brought back from the dead. I had to replace the AC line cord, put in a new electrolytic filter capacitor and also replaced the burned out bulbs with white LEDs. This is a short video of it in operation. These receivers were from the late 1970s into the early 1980s and featured Wadley loop design.
This is a redo, this time corrected with audio, BBC World Service from Ascension Island on December 5 approximately @ 0515 UTC.
Tonight, 10/30/2016, many Over the Horizon Radar Signals, OTHS, have been very active in the upper portion of the 6Mhz. band segment. This is quite unusual to find these here and with this amount of frequent activity.
Came across these while tuning around. They are definitely sky wave propagation because of the QSB. They appear randomly in this band segment. Recorded this using the SDR PLAY SDR with my OCF Dipole and SDR Console v3 software.
This is OK2RZ from the Czech Republic as heard here on 6/5/2016 @ 1945 UTC on 20m. He was speaking about a hail storm there. Some of the USA stations he was working could not be copied here. I was using ,y SDR PLAY RSP with my OCF dipole and SDR Console v3 software. I turned on the LNS, (Low Noise Amplifier), which did improve the copy of his station by lowering the noise floor some.
Many of you have been asking about the “Mystery” signal. Fear not, as it is alive and well and can be heard every night around midnight ET. You can find it lurking between 4700-4800 kHz. Here it is invading the frequency of a navigational beacon. I was using my SDR PLAY and SDR CONSOLE software with my OCF dipole.
Captured the tail end of a MARS training net on 6823 KHz. This was heard with my SDR PLAY RSP and SDR console software V3