Study of the morphology of the low-latitude D region ionosphere using the method of tweeks observed at Buon Ma Thuot, Dak Lak

Abstract

Tweek is the electromagnetic waves at Extremely Low Frequency (3 -3000 Hz) and Very Low Frequency (3-30 kHz) bands, which originates from lightning discharges and propagates about thousands of kilometers in the Earth-Ionosphere waveguide. Recording the tweeks with a maximum up to eighth harmonics using the receiver installed at Tay Nguyen University (12.65 o N, 108. The electron density using the tweek method is lower by about 11-38 % than those obtained using the IRI-2012 model.