LIDAR PRINCIPLE
Lidar physical principle is the same as for radar. A short pulse oflaser light is transmitted from the telescope to the atmosphere. As thepulse travels along, part of it is scattered by molecules,anthropogenic particles, water droplets, or other objects in theatmosphere. The greater the number of scatterers, the greater the partscattered. A small portion of the scattered light is scattered back,collected by the telescope, and detected. The detected signal is storedfor each probed length (bins) according to how long it has beentraveled since the pulse was transmitted, which is directly related tohow far away the backscatter occurred. The collection of bins for eachpulse is called a profile. A bigger concentration in aerosol will beevident as an increase or spike in the back-scattered signal profile,since, for example, the water droplets that make up the cloud willproduce a lot of backscatter.
Leosphere - Meteorology
LIDAR PRINCIPLE
Lidar physical principle is the same as for radar. A short pulse oflaser light is transmitted from the telescope to the atmosphere. As thepulse travels along, part of it is scattered by molecules,anthropogenic particles, water droplets, or other objects in theatmosphere. The greater the number of scatterers, the greater the partscattered. A small portion of the scattered light is scattered back,collected by the telescope, and detected. The detected signal is storedfor each probed length (bins) according to how long it has beentraveled since the pulse was transmitted, which is directly related tohow far away the backscatter occurred. The collection of bins for eachpulse is called a profile. A bigger concentration in aerosol will beevident as an increase or spike in the back-scattered signal profile,since, for example, the water droplets that make up the cloud willproduce a lot of backscatter.