Raman lidar system for the hydrogen molecules remote sensing in atmosphere

Computer simulation of the Raman lidar equation for measurement of the hydrogen molecules at the concentration level of 10$^{13}$ cm$^{-3}$ and higher in atmosphere at the ranging distances up to 100 m in the synchronous photon counting mode and selection of such a lidar optimal parameters have been fulfilled. It is shown that for hydrogen molecules concentration of $N(z)$ = 10$^{13}$ cm$^{-3}$ measurement at the distances from 5 to 100 m the measurement time $t$ is in the range from 3.83 s to 26.5 min, for measurement of concentration $N(z)$ = 10$^{15}$ cm$^{-3}$ – from 38 ms to 15.9 s and for the concentration measurement of $N(z)$ = 10$^{17}$ cm$^{-3}$ – already from 0.4 ms to 160 ms, respectively.