Utility Planet is the official blog for the column of the same name in The Spectrum Monitor. It replaces Utility World in the discontinued Monitoring Times magazine. Utilities are all VLF/LF/MF/HF (and sometimes low-band VHF) radio communications except broadcasting, CB, and non-emergency amateur. If you understood the last sentence, you know enough to read this blog.
Thursday, May 28, 2015
Very Interesting VOA Radiogram for 30-31 May
From Kim Andrew Elliott:
It has been several
months since we last transmitted slow scan television (SSTV) on VOA
Radiogram. Emiliano in Italy notes that the International Space Station
has been using the PD180 SSTV mode. He suggested
that we compare PD180 SSTV images with our usual MFSK32 images. And,
so, we will do that this weekend.
To decode PD180, download MMSSTV from
http://hamsoft.ca/pages/mmsstv.php . (In theory, MultiPSK also decodes PD180, although I have not yet successfully decoded PD180 using MultiPSK.)
In the MMSSTV
interface, under RX Mode, right-click on any mode to reveal the complete
list of modes. Left click on the mode for it to appear in the main
menu. "Auto" under RX Mode should detect that PD180
is the mode, but to be safe, manually select PD180.
After the image is
fully decoded, you can right click on the image, then Copy it to MS
Paint or other program that lets you save images. Or, by clicking on
MMSSTV's History, you can use the left-right arrows
to find the image you have decoded, then use the copy icon, or
right-click to copy.
Another twist in this weekend’s show will be the transmission schedule in Olivia 64-2000
16 dB under the closing music. That will be followed by the usual
“thank you” message, also in Olivia 64-2000, but at full level. The
RSID will not be sent during the second Olivia 64-2000 transmission, so
if you missed it at -16dB, set the mode manually.
Here is the lineup for VOA Radiogram, program 113, 30-31 May 2105, all in MFSK32 except where noted …
VOA Radiogram transmission schedule
(all days and times UTC):
Sat 0930-1000 5745 kHz
Sat 1600-1630 17870 kHz
Sun 0230-0300 5745 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina.
The Mighty KBC
will transmit a minute of MFSK64 Sunday at about 0230 UTC (Saturday
10:30 pm EDT) on 9925 kHz (via Germany). This temporary time slot is one
later than usual, and it coincides with the VOA Radiogram broadcast at
the same time. If you have only one radio, decode from The Mighty KBC at
0230 UTC, then quickly retune to 5745 kHz for VOA Radiogram. Reports
for the KBC MFSK64 to Eric:
Thank you for your
reports from last weekend. I continue to be two weeks behind is
responding to your emails, but I will try to improve that to merely one