\documentclass[a4paper,12pt,russian]{article} \usepackage[utf8]{inputenc} \usepackage[russian]{babel} \usepackage{array,longtable} \usepackage{rotating} \usepackage{setspace} \usepackage{geometry} \usepackage{float} \begin{document} \begin{longtable}[h]{lp{0.7\linewidth}} $A$ & area of the (geometrical) pixel [m\textsuperscript2] \\ $c$ & Speed of light $\approx 3 \cdot 10^8$ m/s \\ $DYN_{in}$ & Input dynamic range [1] \\ $DYN_{out}$ & Output dynamic range~[1] \\ $E$ & irradiance on the sensor surface~[W/m\textsuperscript2] \\ $F$ & Non-whiteness coefficient \\ $h$ & Planck's constant h $\approx6.63 \cdot 10^{-34} Js$ \\ $K$ & overall system gain~[DN/e-] \\ $k_d$ & Doubling temperature of the dark current~[$^\circ$C] \\ $N_d$ & dark current~[e-/s] \\ $N_{d30}$ & dark current for a housing temperature of $30^\circ C$~[e-/s]\textsuperscript2 \\ $S_g^2$ & variance coefficient of the spatial gain noise~[\%] \\ \end{longtable} \end{document}