Germany's DARC reports problems with short wave radars. On almost every evening at 5310-5410 kHz the Russian coastal radar 'Sunflower' broadcasts, making the new miniband useless
The system is located near the city of Makhachkala on the Caspian Sea. Acoustically its perceive as a deep hum. It transmits in FMOP (Frequency Modulation On Pulse) with 43 sweeps/sec and captures aircraft at a range of up to 450 km.
Over water ships are recognized. Even stealth planes can be classified. The system is so successful that the Chinese operate several "sunflowers" on the east coast. Chinese OTHs (Over-Horizon Radars) work almost daily in the 20-meter band.
The station is located north of Penza and not far from Saransk. On the S-meter we see S9 + 40 dB and sometimes +50 dB. The DARC-Bandwacht has informed the BNetzA-Konstanz [Federal Network Agency].
Bandwacht Website - http://www.iarums-r1.org/iarums/latest.pdf
Bandwacht and the IARU Monitoring System - http://www.iarums-r1.org/
DARC - https://darc.de/