
TY  - JOUR
A1  - Mcnamara, LF 
T1  - Evening?Type Transequatorial Propagation on Japan?Australia Circuits
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1973
VL  - 26
IS  - 4
SP  - 521
EP  - 545
KW  - 
UR  - https://doi.org/10.1071/PH730521 
N2  - The correlation between the reception in the evening of v.h.f. signals on Japan Australia circuits and the presence of spread F along the circuits is examined. The correlation is found to be highly significant and leads to the conclusion that spread F is a necessary but not sufficient condition for such reception. The fact that the presence of spread F is not a sufficient condition is explained in terms of either breaks in its distribution along the circuits or of plasma frequencies which are too low to support the proposed propagation mode. 
ER  -

