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Wednesday, December 29, 2010

Summer Daytime Asia Propagation Mode appears

The first signs of the anticicipated Summer Asian Daytime Propagation Mode
materialized on December 28 2010, between 0400 and 0430, (2 pm to 2.30 pm
Melbourne Standard Time)

The Mode is characterised by sudden appearances of signals from the Asian
Region, on 7 MHz and 9 MHz, with propagation over all-daylight paths during
our early afternoon.

This propagation, via complex modes (combinations of E, F, and Sporadic E
topside reflection), occurs only during our summer months, with typical path
lengths
as follows:

INDONESIA (Nabire) 3144 km
MALAYSIA (Kajang) 6070 km
VIETNAM (Hanoi) 7700 km
JAPAN (Tokyo) 8228 km
N. KOREA (Pyongyang) 8749 km
CHINA (Beijing) 9099 km
INDIA (Delhi) 10083 km)

This is a summary of spectrum oc cupoancy, as monitored from a field site in
the Warrandyte State
Park, 20 km east of central Melbourne, using the Eton E5 and 3 m of random
antenna in a bush.

7290 INDONESIA RRI-Nabire
7325 PAPUA NEW GUINEA R. Wantok Light
9500 CHINA CNR1
9505 CHINA V. of Strait
9560 CHINA Xizang PBS, Urumqi, Uyghur
9595 JAPAN R. Nikkei
9630 CHINA CNR1
9635 VIETNAM VOV nat network
9645 CHINA CNR1
9665 N. KOREA KCBS Korean
9685 CHINA CNR8
9750 MALAYSIA VOM English
9760 JAPAN R, Nikkei
9810 CHINA CNR2
9850 VIETNAM nat net
9870 INDIA Hindi
9875 VIETNAM VOV dialects net

Regards from Melbourne!

Bob Padula

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