This work presents the contribution of solar atmospheric tides (diurnal. semidiurnal. and terdiurnal modes) to the variability of the parameters critical frequency (foF2) and peak height of the F2-layer (hmF2) in the American sector during the transition of solar cycles #23 and #24. a period considered one of the lowest solar activities of the modern era. https://joesjeanes.shop/product-category/trouser/