This paper aims at a novel super-resolution imaging design scheme for CX6-02 micro-satellite. In the design of super resolution reconstruction algorithm, under the framework of the hierarchical bayesian, an improved L1 norm prior model based on gradient adaptation is proposed, to avoid the amplification of noise while deconvolution. In imaging mode and system design, the satellite attitude control deviation and ground velocity compensation are used to obtain multi-frame images with sub-pixel information, and in order to exploit the potential of the reconstruction algorithm, the parameters of the optical system are designed by means of high availability redundancy. These make the CX6-02 satellite’s imaging resolution increased from 2.8 to 1.4 meters in the 700km orbit altitude, the whole satellite is 66kg.
With the rapid development of microelectronics, nanotechnology and integrated design concept, the trend of satellite miniaturization is becoming more and more obvious, and the high resolution of small satellites is enhanced, and the capability of remote sensing is the forward position to promote space exploration and technological innovation. For the telephoto optical system, the influence of the spatial thermal environment changes and the change of the gravity field before and after the launch will change the focal length of the optical system, resulting in blurred image, so the need for focusing the focus parts to focus. According to the overall technical requirements of the satellite, a small-scale super-resolution spatial camera system based on the traditional Cass-grain optical system is designed. The modal, sinusoidal vibration and random vibration of the system are simulated by mechanical simulation software. The results shows that the mechanical properties of the system are good. The load has been successfully launched and a good image effect has been achieved.
A multichannel all fiber current sensor that can be used to measure currents at different positions simultaneously is presented in the paper. Each sensor head uses single-polarization single-mode devices and loop scheme to realize current measurement. All the sensor heads are connected via a series structure and the measured results are received by only one photo-detector based on the principle of time-division multiplexing. Theory and experiment prove that the sensor is feasible.
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