Chinese Journal of Quantum Electronics, Volume. 40, Issue 6, 888(2023)
Opto-mechanical design and experimental analysis of high-altitude spectral radiance meter
In order to meet the current demand for high-precision calibration of satellite-borne remote sensors, a high-altitude spectral radiance meter has been developed, which can be applied to the radiance method instead of the traditional site calibration method to improve calibration accuracy. The instrument has a spectral range from 400 nm to 2500 nm, and can be mounted on a high-altitude balloon platform to measure the reflected radiance to the ground directly at an altitude from 18 km to 35 km. The optical-mechanical system of the instrument is mainly composed of a front integrated lens barrel, a dispersion module and the optical-mechanical temperature control module. In order to verify the reliability of the high-altitude spectral radiance meter and the accuracy of the measured data, a comparison experiment between this instrument and the SVC spectrometer of Spectra Vista (USA), as well as a high-altitude flight experiment, was carried out in Dachaidan, Qinghai. The experimental results show that there is good consistency in the radiance measured by the two instruments, with a deviation of the two instruments generally within ±1% and a maximum deviation within ±3.5%. In the high-altitude flight experiment, the instrument can keep stable at an altitude of 25 km in the six-hour flighting, and the temperature of each module and detector remains at the setpoint. In the end, the result of high-altitude measurement radiance was obtained. The experimental result has verified the reliability of the entire instrument, indicating that the developed instrument can meet the high-precision calibration requirements of satellite remote sensors and is suitable for the high-altitude high-precision measurement.
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Zhuhai KANG, Xin LI, Enchao LIU, Quan ZHANG, Xiaobing ZHENG. Opto-mechanical design and experimental analysis of high-altitude spectral radiance meter[J]. Chinese Journal of Quantum Electronics, 2023, 40(6): 888
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Received: Jan. 7, 2022
Accepted: --
Published Online: Dec. 22, 2023
The Author Email: LI Xin (xli@aiofm.ac.cn)