Shortwave Radiogram, 30 July-2 August 2020: Digital modes for high-altitude mammals


Many Shortwave Radiogram listeners enjoy decoding SSTV transmissions
from the International Space Station. The next SSTV from the ISS is
scheduled for 4 and 5 August, on the usual 145.8 MHz FM. Details are here. The passes seem to be timed for Moscow, so we North American might not be able to receive the images.

This weekend, our art of the week will be a design by our analyst Roger
in Germany. Roger explains that the picture “uses only mixtures of
colors, where there are only 3 values in the RGB channels: 0, 128 and
255. Thus, only a lower, middle and an upper tone line appear in the
sonogram.” So watch your waterfalls, which will also be artistic.

Videos of last weekend’s Shortwave Radiogram (program 162) are provided by Scott in Ontario and Frigid RF in Virginia, both Friday 1300 UTC.The audio archive is maintained by Mark in the UK. Analysis is prepared by Roger in Germany.

This weekend’s show is in MFSK16 in addition to the usual MFSK32 and MFSK64, with eight MFSK images.

Here is the lineup for Shortwave Radiogram, program 163, 30 July-2 August 2020, in MFSK modes as noted:

1:44  MFSK32: Program preview
2:58  MFSK16: ARRL/TAPR conference call for papers
5:40  MFSK32: Highest-altitude mammal is a mouse*
11:03  MFSK64: China’s South China Sea propaganda*
17:20  This week’s images*
27:40  MFSK32: Closing announcements

* with image(s)

Please send reception reports to

And visit

Twitter: @SWRadiogram or (visit during the weekend to see listeners’ results)

Facebook group:

Shortwave Radiogram Gateway Wiki

Shortwave Radiogram Transmission Schedule

| UTC Day  | UTC Time      | Frequency        | Transmitter       |
| Thursday | 2330-2400 UTC | 9265 kHz         | WINB Pennsylvania |
| Friday   | 1300-1330 UTC | 15770 kHz        | WRMI Florida      |
| Friday   | 1500-1530 UTC | 15750 kHz DRM    | WINB Pennsylvania |
| Saturday | 0230-0300 UTC | 9265 kHz         | WINB Pennsylvania |
| Saturday | 1330-1400 UTC | 15770 kHz        | WRMI Florida      |
| Sunday   | 0800-0830 UTC | 5850 and 7730 kHz| WRMI Florida      |
| Sunday   | 2330-2400 UTC | 7780 kHz         | WRMI Florida      |

The Mighty KBC transmits to North America Sundays at
0000-0200 UTC (Saturday 8-10 EDT) on 9925 kHz, via Germany. A minute of
MFSK is at about 0130 UTC.  Between 0130 and 0200 UTC, also look for
text transmissions by Peter John simultaneous with his DX Headlines,
Reports to Eric: . See also and

“This is a Music Show” Most of the show is a music
show, but the host transmits some MFSK text and image near the end of
the broadcast. It’s transmitted on WRMI, Thursdays at 0200-0300 UTC on
5850 kHz (Wednesday evening in the Americas) and a new time also on
WRMI, Wednesdays at 2100-2200 UTC on 7780 kHz (aimed towards Europe) .
Also look for a waterfall ID at the beginning of the show. .

New York and Pennsylvania NBEMS nets. Most weekends, as
KD9XB, I check in to the New York NBEMS (Narrow Band Emergency
Messaging Software) net Saturday at 1200 UTC on 3584 kHz USB, and the
Pennsylvania NBEMS net Sunday at 1200 UTC on 3583 kHz USB (with
out-of-state check-ins now starting at 1130 UTC). Check-ins are usually
in Thor 22, and messages are in MFSK32. Messages generally use the Flmsg
add-on to Fldigi. If you are a radio amateur in eastern North America,
feel free to check in. Outside the region, use an SDR in the eastern USA
to tune in and decode. You do not need Flmsg to check in, and most of
the messages can be read without Flmsg. If you can decode the net, send
me an email to , or tweet to @SWRadiogram , and I
will let them know you are tuned in. USEast NBEMS Net: Please also note the USEast NBEMS Net, Wednesdays 2300 UTC (7 pm EDT) on 3536 kHz USB.


@radio_no_koe in Tokyo used an SDR in Russia to receive these images 24 July 2020, 1300-1330 UTC, 15770 kHz from WRMI Florida …

Fuente: Shortwave Radiogram, 30 July-2 August 2020: Digital modes for high-altitude mammals


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