0 votes 0 votes The maximum usable frequency of an ionospheric layer at $60^{\circ}$ incidence and with $8 \; \mathrm{mHz}$ critical frequency is $16 \; \mathrm{MHz}$ $\frac{16}{\sqrt{3}} \; \mathrm{MHz}$ $8 \; \mathrm{MHz}$ about $6.93 \; \mathrm{MHz}$ Others gate1998-ec + – admin asked Sep 26, 2022 • edited Dec 1, 2023 by makhdoom ghaya admin 46.4k points 37 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.