METHOD FOR DETERMINING VERTICAL INTENSITY PROFILE OF OPTICAL TURBULENCE IN ATMOSPHERE Russian patent published in 2023 - IPC G01S17/95 

FIELD: meteorology; atmospheric physics.

SUBSTANCE: invention can be used to determine the vertical intensity profile of optical turbulence in the atmosphere. Sensing of the atmosphere is performed using a lidar operating on the effect of backscatter amplification, and a route survey meter. At that, the lidar system consists of a lidar, an echo signal transceiver, an echo signal registration unit, and a computer. The route survey meter consists of a low power continuous wave laser and a receiver. The lidar sensing route has a horizontal section equal to the length of the route survey meter base, located between the lidar and the flat rotary mirror, and a vertical section extending upward from the rotary mirror. The route of the meter is located next to the horizontal section of the lidar route. The atmosphere is sensed in the vertical direction using the lidar. The echo signals received by the lidar transceiver enter the recording unit in the form of photoelectric pulses. The signals are analysed in the recording unit using a discriminator, and then converted into TTL-level signals, which enter the photon counter. The photon counter accumulates signals along the entire sensing route The accumulated information about the spatial distribution of the echo signals of the main and additional receiving channels is transmitted from the recording unit to the computer. The computer calculates the effect of turbulence on the average scattered light power at the receiver. Continuous laser radiation is propagated into a turbulent atmosphere and the light intensity is recorded in the form of electrical signals using the route survey meter receiver. The recorded signals are filtered, digitized and transferred to a computer, where the relative dispersion of light intensity fluctuations is calculated. Then, the structural characteristic of the refractive index is calculated using the Rytov formula and the vertical intensity profile of optical turbulence in the atmosphere is determined.

EFFECT: determination of the vertical intensity profile of optical turbulence in the atmosphere.

1 cl, 1 dwg