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Znów zaczyna się trans, po naszemu "cug", wino wali nas w łeb, potem zwala z nóg. Orła wykonał ktoś, a tu jeszcze jakis debil zgubił szlugi jak na zło |  |
| | | | Stasiek_Radiowiec_Gasior | 27.05.2021 15:40:26 | 
Grupa: Użytkownik
Posty: 18 #7821622
Od: 2021-5-22
| HF radars continue to be troublemakers, IARU Region 1 Monitoring Service says
SARL News reports the biggest headache for International Amateur Radio Union Region 1 Monitoring Service participants continues to be HF over-the-horizon radars (OTH-Rs). Already an interference issue for several years, OTH-R activity seems to be multiplying exponentially.
Most of the stations are located in China and Russia. "The same troublemakers every month, the OTH-Rs are by far the most troublesome!" said IARUMS Coordinator Peter Jost, HB9CET, in the April edition of the IARUMS Monthly Newsletter.
Monitor reports from Europe and Africa showed OTH-R signals littering the 20-metre phone band, with some also showing up as high as 15 metres, as well as down on 40 metres and lower. These include the infamous "Foghorn" OTH-R, so-called because of the sound of the approximately 10 kHz wide transmissions, mostly in short bursts. The Russian Kontayner OTH-R has also been spotted on 20 metres and elsewhere, generating an approximately 12 kHz bandwidth signal. "What is always surprising is how strongly intruders from the Far East can be heard in IARU Region 1, sometimes even during the day in the 40-metre band, e.g., the 160 kHz wideband radar or also some other radars like the 'Foghorn' or similar," Jost said.
A newcomer of sorts has been Super Dual Auroral Radar Network (SuperDARN) HF radar signals causing interference to radio amateurs on 14,210 MHz and possibly elsewhere. The SuperDARN system is an international scientific radar network consisting of 35 HF radars in both the Northern and Southern Hemispheres. These radars are primarily used to map high-latitude plasma convection in the F region of the ionosphere, but they are also used to study a wider range of geospace phenomena, including geomagnetic storms.
SuperDARN network radars look into Earth's upper atmosphere and operate continuously to observe the motion of charged particles (plasma) in the ionosphere and other effects that provide scientists with information on Earth's space environment. Knowledge gained from this work provides insight into space weather hazards, including radiation exposure for high-altitude travellers and disruptions to communication networks, navigation systems (GPS) and electrical power grids.
HF Radars Continue to be Troublemakers, IARU Region 1 Monitoring Service Says
IARU Monitoring System Region 1
Monthly Newsletter 4 - April 2021
edited by Peter Jost, HB9CET and Gaspar Miró, EA6AMM |
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