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Sunday, June 27, 2010

Propagation excellent in 6 MHz band in mid to late mornings!

The shortest day for Melbourne occurred on Thursday June 24, 2010, where
daylight was limited to 9h 32m and 41s!

Our sunrise is now at 7.36am (2132 UTC), and earliest sunset will be on July
1, at 5.11pm (0711 UTC).

Solar transit is now 12.10pm (0210 UTC), when the sun only reaches 28.8
degrees above the horizon.

From here in suburban Melbourne, the sun is due north at the transit, just
peeking out above the roof line!

This means that there are interesting opportunities to study midday
propagation on 6 MHz during the present period of negligible solar activity.

In fact, the 10.7 cm solar flux was down 75 on June 26, and the equivalent
smoothed sunspot number was 13, extremely low. according to IPS in Sydney!

On June 26 and 27, the 6 MHz band produced some good signals here in
Melbourne between 9am and noon - that's 2300-0200 UTC.

Of special importance was the Antarctic shortpath propagation mode from
South America, including Chile and Argentina.

Signals from Central and North America were also present, combined shortpath
mode across the Pacific, and longpath across the Middle East. Lots of
shortpath activity from Europe and Asia!

Here are some entries:

5915 THAILAND VOA-Udorn 2305 English
5920 USA WHRI 0030-0100 Spanish
5930 F. GUYANA WYFR-Montsinery 0030 Spanish
5935 USA WWCR 0010-0100 English
6030 USA R. Marti Greenville 2340 onwards Spanish
6055 SPAIN REE 2335 onwards Spanish
 "   INDIA AIR 2305-2315 English
6060 ARGENTINA RAE 2335-0000 Spanish
6070 CHILE CVC-Santiago 2330-0000 Spanish
6100 CANADA RCI-Sackville 0050-0100 English
6110 CHINA Xizang PBS Lhasa 2305-2330 Tibetan
6145 CANADA CRI-Sackville 2345-0000 English
6175 ALBANIA CRI-Cerrick 2315-2330 Spanish

The study of propagation during these daytime windows on the lower frequency
bands (e.g. 6 MHz and 7 MHz) is important!

Regards from Melbourne!


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