Device for automatically adjusting observation directions of on-water spectrograph

Abstract

The invention discloses a device for automatically adjusting observation directions of an on-water spectrograph. The device comprises a base and a rotating platform, wherein the rotating platform is located above the base, and a base supporting rotating shaft is connected with a rotary bearing of the rotating platform and drives the rotating platform to rotate through the rotary bearing. The on-water spectrograph is installed above the rotating platform, a single-chip microcomputer in the base controls the rotating platform according to observation azimuth angles, confirmed by the incidence direction of the Sun, of the on-water spectrograph, drives the on-water spectrograph installed above the rotating platform to automatically adjust the observation directions, keeps ideal observation geometry with a certain included angle formed between the on-water spectrograph and the incidence direction of the Sun, and improves accuracy of measuring optical parameters of water surface appearance. A method for adjusting the observation directions of the on-water spectrograph comprises the steps: calculating the incidence azimuth angle of the Sun, confirming the observation azimuth angles of the on-water spectrograph, and adjusting the observation directions of the on-water spectrograph, wherein the incidence azimuth angle of the Sun is calculated and confirmed through time and longitude and latitude of a position where the Sun is located in a real-time mode, and the relative included angle of observation orientation of the on-water spectrograph and the incidence direction of the Sun is 100 degrees.

Description

technical field [0001] The invention relates to a marine surveying instrument, in particular to a device for automatically adjusting the observation direction of a spectrometer on water. Background technique [0002] The water spectrometer is an important instrument and equipment for measuring the surface optical parameters of the water body. The measured radiance from the water is the basic physical quantity of ocean water color remote sensing and the optical performance of the pigment composition of the water body. Accurate on-site acquisition of water-leaving radiance will be beneficial to the development of bio-optical algorithms and atmospheric correction algorithms, as well as the radiation correction of spaceborne remote sensors and the authenticity test of their data. [0003] A reasonable observation geometry must be used for the measurement of the water spectrometer. The observation direction and the sun’s incident direction form a certain angle, generally 100°, so...

AI Technical Summary

Problems solved by technology

At present, the determination of the observation geometry of domestic and foreign water spectrometers is manually judged on the spot, and the determination of the angle is not accurate, especially it cannot be adjusted automatically, which cannot meet the requirements of automatic measurement.

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