
TY  - JOUR
A1  - McNicol, RWE 
A1  - Webster, HC 
A1  - Bowman, GG 
T1  - A Study of "Spread?F" Ionospheric Echoes at Night at Brisbane. I. Range Spreading (Experimental)
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1956
VL  - 9
IS  - 2
SP  - 247
EP  - 271
KW  - 
UR  - https://doi.org/10.1071/PH560247 
N2  - At frequencies well below the critical frequency, satellite echoes sometimes accompany the night-time F2 echo, sometimes clearly separated, sometimes overlapping. In an investigation of these range multiplets, in addition to routine P'f sounding records, continuous virtual range measurements at fixed frequency (at stations of various separations), and measurements of mean intensities, phase-path changes, and directions of arrival, have been carried out. 
ER  -

