AFTER THE SOLSTICE - A VISIT TO THE 7 MHZ BAND AT 5 AM (1800 UT)

 

AFTER THE SOLSTICE - A VISIT TO THE 7 MHZ BAND AT 5 AM (1800 UT)

 

Here in Melbourne, the Summer Solstice occurred on Dec  22 2014, and

since then, HF propagation has started to swing back to the winter pattern.

 

The Solstice is an astronomical event that happens twice, once in summer and

once in winter, each year when the Sun reaches its highest position in the

sky as seen from the North or South Pole. During Solstices the tilt of the

axil of the Earth (with respect to the Sun) is the maximum at 23° 26'.

 

Solstices occur on  June 20 or 21 and December 21 or 22 each year. During

summer the day of the solstice is the longest day of the year and during

winter the day of the solstice is the shortest day of the year.

 

During June it is Summer Solstice in the Northern hemisphere and Winter

Solstice in the Southern hemisphere. In other words during June Solstice it

is summer time in the UK, the USA, Canada, Russia, India and China and it is

the longest day of the year while it is winter time in Australia, Argentina,

Chile, New Zealand and South Africa and it is the shortest day of the year.

 

Similarly during December it is Winter Solstice in the Northern hemisphere

and Summer Solstice in the Southern hemisphere. In other words during

December Solstice it is winter time in the UK, the USA, Canada, Russia,

India and China and it is the shortest day of the year while it is summer

time in Australia, Argentina, Chile, New Zealand and South Africa and it is

the longest day of the year.

 

To avoid any confusion Solstices are preferably referred as June Solstice

(Northern Solstice) and December Solstice (Southern Solstice). Summer

Solstice is also known as Aestival Solstice.

 

This a summary of spe spectrum occupancy in the top portion of the 7MHz band as

observed on  January 8 2015 in the time span 1800 to 1830, marked by many

signals from Europe, Asia, Africa and the Middle East, arriving from the

west.

 

7325 CHINA CRI-Beijing Persian

7340 CHINA CRI-Kashi Italian

7350 ROMANIA RRI Romanian

7360 GERMANY BVB-Nauen Persian

7385 ALBANIA CRI-Cerrick French

7395 CHINA CRI-Kashi German

7405 CHINA CRI-Kashi English

7415 CHINA CRI-Xian Persian

7425 IRAN German to 1820*

7435 CHINA CRI-Jinhua Italian

7445 MADAGASCAR BBC-Talata English

7445 CHINA CRI-Urumqi Chinese

7465 S. AFRICA BBC-Meyerton French

7495 THAILAND Deewa Radio (VOA) Udon Pashto

7505 THAILAND BBC-Nakhon Dari

7520 KUWAIT R. Farda Persian

7550 INDIA English

7570 N. KOREA VOK English

7585 KUWAIT R. Farda Persian