These 'Fraunhofer' lines are due to the absorption of light of specific frequencies by the gases in the upper atmosphere of the sun. \(1\). Line spectra are produced when electrons move from one ...

187. David M. Slocum, "Molecular line shape analysis at terahertz frequencies using multispectral fitting," Ph.D. dissertation, Dept. Physics and Applied Physics ...

Differential Absorption Lidar (DIAL) is an advanced remote sensing technology used to measure atmospheric gases, particularly greenhouse gases like carbon dioxide (CO2) and methane (CH4).

Since many of these gases are trace gases with extremely weak absorption/emission features ... NASA’s Planetary Spectrum Generator is well-suited for the simulation of planetary atmospheric spectra ...

Another notable development is the High Altitude Lidar Observatory (HALO), which utilizes airborne differential absorption ... to measure backscatter spectra of atmospheric water and aerosols ...