
TY  - JOUR
A1  - Thomas, JA 
T1  - Double?Layer Phenomena in the Es Region
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1956
VL  - 9
IS  - 4
SP  - 574
EP  - 578
KW  - 
UR  - https://doi.org/10.1071/PH560574 
N2  - At Brisbane, ionospheric records are frequently made which show the simultaneous presence of two types of Es ionization, one at greater virtual range than the other; these have been classified by McNicol and Gipps (1951) as "sequential" type (Ess), and "constant-height" type (Esc), respectively. Such records occur most frequently in the late afternoon and early evening, particularly in summer, when Ess is in its last stages and Esc is building up to its maximum intensity (Thomas 1956). 
ER  -

