UV emission of silicon oxide molecules observed from a non-thermal atmospheric pulsed dielectric barrier discharge was experimentally explored in a spectral range from 228 to 253 nm. The main vibrational bands (1, 1), (2, 2) and (0, 1) of A 1 -X 1 + electronic transition were investigated. Corresponding synthetic spectra was built up and adjusted with good agreement. Excitation temperatures (T vib , T rot ) were deduced as a function of gas composition. It is shown that the rotational temperature can represent a non-intrusive diagnostic of plasma gas temperature in process control.

We represent here our report on the remote study of the Martian atmosphere near the surface by a compact aerosol diode lidar during the Mars Surveyor Lander-98 mission. We are planning to study the daily and seasonal variations of the vertical structure of the atmosphere near the surface, both in active and passive mode. In passive mode, the lidar will measure: 1) sky brightness by basic receiving channel;2) sky brightness in polarization plane of additional receiving channel.In active mode, the lidar measures the vertical profile ofthe atmospheric backscatter coefficient.

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