Chinese 'Foghorn' OTH radar
 | |
|---|---|
| Frequencies | 6 MHz,29 MHz |
| Frequency Range | 6 MHz - 29 MHz |
| Mode | USB |
| Modulation | FMCW |
| ACF | — |
| Emission Designator | — |
| Bandwidth | 10 kHz |
| Location | China / Worldwide |
| Short Description | A Chinese over the horizon radar, known as "foghorn" among amateur radio operators. Not much is known about it. |
| I/Q Raw Recording | — |
| Audio Sample | |
Very little information about this over-the-horizon radar is available. The name "Foghorn" was apparently coined by amateur radio operators or shortwave listeners based on the sound that resembles a ship foghorn. [1][2]
Type 2319 has been mentioned in the UDXF community logs, but it has not been confirmed if this is the correct name for this radar.
The radar transmits FMCW signal with about 10 kHzKiloHertz (kHz) 10^3 Hz of bandwidth in bursts that typically last a few seconds, but may take longer as well. Sweep rates of 42, 48, 50, 67 and 83 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). have been observed. 67 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). is probably the most common, and 83 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). is rare. Unlike some other OTHOver The Horizon (very long range) radars, this radar does not seem to transmit an intro tone before the burst. Transmission often happens on multiple nearby frequencies in a sequential manner.
Some sources claim that this radar uses pulsed modulation. This seems to be a misunderstanding unless there is another radar that uses similar transmission parameters and transmits in pulses. (Fixme)
Samples[edit]
The following examples contain narrow USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) (5 kHzKiloHertz (kHz) 10^3 Hz), wide USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) (10 kHzKiloHertz (kHz) 10^3 Hz) and FMFrequency Modulation samples. The showcase sample is 67 sweeps/sec, narrow USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables).
| 67 sweeps/sec | 50 sweeps/sec | 48 sweeps/sec | 42 sweeps/sec |
|---|---|---|---|
| Narrow USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): Wide USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): FMFrequency Modulation:  |
Narrow USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): Wide USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): FMFrequency Modulation:  |
Narrow USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): Wide USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): FMFrequency Modulation:  |
Narrow USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): Wide USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables): FMFrequency Modulation:  |
Frequencies[edit]
Frequency range of this radar is not well known. It can change its frequency according to propagation conditions. Ranges from 6 MHzMegaHertz (MHz) 10^6 Hz to 29 MHzMegaHertz (MHz) 10^6 Hz and 7 MHzMegaHertz (MHz) 10^6 Hz to 25 MHzMegaHertz (MHz) 10^6 Hz have been reported.
Video Examples[edit]
Radar "Foghorn" (CHN) en 20 metrosChinese Foghorn Over-the-Horizon RADAR 48Hz PRF | Signal Phantom
Chinese 'Foghorn' Over-the-Horizon RADAR 48Hz PRF with beam steering | Signal Phantom
Chinese Foghorn Over-the-Horizon RADAR 83Hz PRF (long) | Signal Phantom
Additional Links[edit]
Additional Images[edit]
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