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Sunday, June 16, 2013

Shortest day monitoring from Warrandyte State Park

Long-haul daytime propagation into Melbourne during our present winter season on frequencies below about 9 MHz is very disappointing.
 
At  this time of year, many signals from Europe, Middle East and Africa are usually present across our local midday (0200 UTC) on 6 MHz and 7 MHz, but this year they have been strangely absent!
 
I had believed that my home location here in Mont Albert might have been the problem, so I went over to one of my favourite monitoring sites in the Warrandyte State Park on June 15 2013, which is relatively free of RFI, but found much the same dismal propagation pattern there! Activity on 9 MHz was was good.
 
I think that the days of 6 MHz propagation in our mid-winter across noon have now gone for good!
 
The shortest day in Melbourne occurs on June 17 2013, and the days surrounding this event would normally be very good for observing midday propagation. On that day, the inhabitants of Melbourne are granted only 572 minutes (9hrs 32 mins) of daylight, with sunrise at 7.15 am and sunset at 4.47 pm. Solar Noon is at 12.00.36 local (0200.00.36 UTC) and the solar declination at that time is 23.3 degrees.
 
Here is a summary of the Warrandyte observations, using the small Eton  E10 receiver and a 10 m long wire antenna.
 
0200
No signals at all between 0200 and 0220 on 6 MHz and 7 MHz. Many on 9 MHz!
 
0220
7280 G GERMANY R. Farda, Nauen, Persian, first signal to appear, at 0220
7315 USA WHRI Spanish
7365 USA R. Marti
 
9370 KUWAIT VOA – R. Deewa, Pashto
9420 GREECE VOG Greek
9435 ARMENIA VOR-Yerevan Spanish
9465 TURKEY Uyghur
9490 ARMENIA VOR-Yerevan Spanish
9500 ENGLAND BBC-Woofferton Persian
9535 SPAIN REE Spanish
9550 CUBA RHC Spanish
9570 ALBANIA CRI-Cerrick Chinese
9579 MOROCCO R, Medi, Nador, Arabic
9595 INDIA Urdu
9620 SPAIN REE-Noblejas Spanish
9645 ROMANIA RRI Spanish
9665 MOLDOVA VOR-Kishinev English
9690 SPAIN CRI-Noblejas English
9700 IRAN Pashto
9710 CHINA CRI-Kashi
9730 IRAN Urdu
9750 UAE FEBA-Dhabbaya Urdu to 0230*
9760 GERMANY R.Farda, Nauen, Persian
9790 UAE FEBA-Dhabbaya Dari
9800 IRAN Tajik to 0230*
9810 THAILAND BBC-Nakon Bengali
9815 CHINA CRI-Kashi Chinese
9835 MALAYSIA RVTM-Kajang Malay
9860 RUSSIA VOR-Moscow Russian
9870 INDIA National network
9885 TAJIKISTAN RFA-Dushanbe Tibetan
 
0300
7310 GERMANY Biblis Voice, Nauen, Arabic
7350 ROMANIA English
7435 GERMANY RFE-Lampertheim Russian
7445 GERMANY RFE-Biblis Russian
7460 MOLDOVA R. Baha'i, Kishinev, Persian
7475 GREECE VOG Greek
 
 
 

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