[A-DX] ITU Free publications Comments Feed

[Roger]

falls wir das hier noch nicht hatten:

https://19max63.wordpress.com/2018/10/17/itu-free-publications

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z.B.:
https://19max63.wordpress.com/r-hdb-32-1998-pdf-e/
HANDBOOK
THE IONOSPHERE AND ITS EFFECTS ON RADIOWAVE PROPAGATION
A guide with background to ITU-R procedures for radio planners and users
Download: https://bit.ly/2P3EcFf
"....8.1.3 Sporadic-E propagation
Intense sporadic-E ionization in the form of a horizontal sheet of about 
1 km average thickness, a
horizontal dimension of the order of 100 km and a height of about 100 to 
120 km, can cause
abnormal VHF propagation for periods lasting for several hours.
The occurrence of sporadic-E propagation decreases with increasing 
frequency, but can be a
significant cause of interference at frequencies up to about 135 MHz...."

Sporadic-E kann aber auch für unerwartete Empfänge in der toten Zone 
(F2) im unteren Kurzwellenbereich sorgen.
Tiefste bisher beobachtete und nachgewiesene Frequenz:   6,07  MHz   
(ch292, bei F2>1500 km)



https://19max63.wordpress.com/r-hdb-59-2014-pdf-e/
Handbook on Ground Wave Propagation
Edition of 2014
Download: https://bit.ly/2Ack8sa


https://19max63.wordpress.com/r-hdb-23-2011-pdf-e/
HANDBOOK SPECTRUM MONITORING
Edition 2011
Download: https://bit.ly/2AcPK0I



roger