Novel Techniques for Atmospheric Monitoring for EAS Detectors Using High Resolution Spectroscopy

First, we present a system based on a pair of Fabry-Perot interferometer prototypes to be used for quantifying the aerosol and molecular scattering coefficients, in two separate channels. The system is considered in operation either for backscattering measurements or in bi-static mode giving unbiased measurements of the aerosol phase function. The advantages over existing methods are analyzed. Secondly, we present strategies based on high resolution spectroscopy for measuring atmospheric absorption coefficients at ionospheric heights, specifically at the wavelengths of the main nitrogen fluorescence lines produced by Extensive Air Showers at the troposphere.