Showing posts with label emergency. Show all posts
Showing posts with label emergency. Show all posts

Thursday, November 14, 2024

DRM in China update















Above: Image of emergency broadcast test 17700kHz coverage simulation

Lots of DRM activity going on in China!

It was reported via a Japanese listener on WOR that on 29 October 2024 an emergency broadcast test occurred on 17700 kHz in DRM mode, broadcasting weather in Sichuan Province.

<https://mp.weixin.qq.com/s/VIoFE3zpt1H8ncTAlCY86A>


B24 DRM schedule of CNR release 8 November 2024:

Beijing      13825 kHz 0100-0900 30kW 175deg.

Dongfang  17770 kHz 0100-0900 30kW 16deg  ID:27FA

Kunming   15180 kHz 0100-0400  0800-1100 30kW 32deg  ID:3EB

                17800 kHz 0400-0800 30kW 32deg  ID:3EB

Urumuqi    9655 kHz 2200-0100  0800-1200 30kW 98deg  ID:3FC

                17830 kHz 0100-0800 30kW 98deg  ID:3FC


Additional frequencies registered in HFCC B24 but not officially announced 

Beijing       6030 kHz

Dongfang   11695 kHz (and possibly 21530 kHz)    

Qiqhar       11990 kHz 

                13710 kHz 

                13850 kHz 

It is thought that the Qiqhar transmitter has been converted to jamming. Also 21530 kHz (30kW 341deg Dongfang), which was registered as an irregular frequency in A24, is reported to have been still used in B24.

<https://cahcn.github.io/drm/>


Another set of frequencies using the CUC-ECDAV ID (corresponding to the Research Center for Radio-Television Digitization Engineering of the University of Communications of China) have been spotted on:

6185 kHz

7500 kHz

9500 kHz

11500 kHz

Lastly, on 2 November 2024 the ID DRM broadcast from Fuzhou was seen. 

<https://kbysradio.wordpress.com/2024/11/03/%e4%b8%80%e5%91%a8%e7%ae%80%e6%8a%a5%ef%bc%882024-10-27-11-2%ef%bc%89/>


With all these frequencies and activity, we can hope that the great propagation conditions result in North American decoding for many of these signals!



Sunday, April 26, 2015

Nepal emergency HF - please keep clear


I am hearing 14.205 MHz as active by Twente SDR.
 Also, 21.360 MHz may be in use for the emergency.

Sunday, June 8, 2014

DRM audio for International Radio for Disaster Relief Trial

Here is the DRM audio program that was available for the International Radio for Disaster Relief (IRDR) Trial on June 5th and 6th.

Friday, May 30, 2014

International Radio for Disaster Relief DRM Trial

"Digital Radio Mondiale announced that the Emergency Warning Features of the DRM system would be featured in a broadcast included in the International Radio for Disaster Relief Trial (IRDR) Trial to coincide with the Media Summit on Climate Change to be held June 4–6 in Jakarta, Indonesia"...

June 5-6
15650kHz (BBC/Babcock)
0300–0330, 0400–4300, 0500–0530 UTC
 

 

UPDATE: 20140601
Special transmissions in English or Mandarin targeting Indonesia (in UTC) on June 5-6, 2014
(
unknown if these are all DRM):

  • 0200-0230 ABC Radio Australia, Shepparton - 21840 kHz
  • 0230-0530 BBC, Nakhon Sawan, Thailand - 15650 kHz
  • 0500-0530 R Vatican, Santa Maria di Galeria - 21840 kHz
  • 0530-0600 Sri Lanka BC, Trincomalee - 15650 kHz
  • 0600-0700 First Response Radio via FEBC, Philippines - 15650 kHz
  • 0730-0800 MGLOB Madagascar - 21840 kHz (alternative time: 0930-1000)
  • 0800-0830 IBB, Tinang or Udon Thani - 15650 kHz
  • 0830-0900 NHK World Radio Japan, Palau - 15650 kHz
  • 0900-0930 IBB, Tinang or Udon Thani - 15650 kHz
  • 1000-1030 All India Radio, Bangalore - 15650 kHz
  • 1030-1100 RTC China (in Standard Chinese), Beijing - 21840 kHz
  • 1100-1130 KTWR Guam - 15650 kHz

    <
    from Mauno Ritola on the WRTH Facebook group, via DXLD>