DEVELOPMENT OF CALIBRATION SCHEME AND SOFTWARE FOR DOPPLER LIDAR RECEIVER

An Incoherent Doppler lidar (laser radar) is being developed at National Atmospheric Research Laboratory, Gadanki(13.5 7deg; N, 79.2 degree E), India to measure winds in troposphere and stratosphere. The lidar has a stabilised laser source, a telescope and a receiver. In the receive chain, the system employs a servo stabilised Fabry-Perot Interferometer as a narrow pasband filter for measuring wind velocities. Calibration of receive chain with Fabry- Perot Interferometer is crucial for deriving the wind velocities. The developed calibration scheme gives two informations, one, the exact operation point of the Fabry-Perot Interferometer and the second to generate "Lookup table" which is useful in deducing the winds. A software is developed for the purpose which is tested independently.