Abstract
Luojia1-01 satellite is the first scientific experimental satellite applied for night-time light remote sensing data acquisition, and the payload is an optical camera with high sensitivity, high radiation measurement accuracy and stable elements of interior orientation. At the same time, a special shaped hood is designed, which significantly improved the ability of the camera to suppress stray light. Camera electronics adopts the integrated design of focal plane and imaging processing, which greatly reduces the volume and weight of the system. In this paper, the design of the optical camera is summarized, and the results of in-orbit imaging performance tests are analyzed. The results show that the dynamic modulation transfer function (MTF) of the camera is better than 0.17, and the SNR is better than 35 dB under the condition of 10 lx illuminance and 0.3 reflectivity and all indicators meet the design requirements. The data obtained have been widely applied in many fields such as the process of urbanization, light pollution analysis, marine fisheries detection and military.
Highlights
Night-time light remote sensing image refers to the night-time image of the earth obtained by the optical remote sensing device
modulation transfer function (MTF) is obtained by differentiating the line spread function
The in-orbit test results show that the performance of the camera meets all the design requirements
Summary
Night-time light remote sensing image refers to the night-time image of the earth obtained by the optical remote sensing device. The world’s two major night-time light sensors are the United. The quality of remote sensing data acquired is mainly determined by spatial resolution radiation measurement accuracy, dynamic range and sensitivity. OLS and VIIRS have spatial resolution of 2.7 km and 740 m and dynamic range of 6 bit and 14 bit respectively. (Changchun, China) can provide 1 m resolution night-time light color remote sensing images and is the highest spatial resolution satellite used in this field by far. Considering the spatial resolution, width and the influence of radiation measurement precision’s comprehensive effect on remote sensing data, Wuhan University developed Luojia satellite, which has been successfully launched on 2
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have