The Design And Implementation Of The Payload Simulator For Image Navigation And Registration

The development of meteorological satellite changes people’s living and production way deeply. In addition to the daily weather forecast, it also plays an important role in the monitoring and early warning of natural disasters such as floods, droughts, ice storm and so on. This topic comes from the interferometric vertical atmosphere sounder, carried by the FY4 meteorology satellite spacecraft. According to the structure and characteristics of payloads working on the three-axis stabilized satellite, we developed a set of payload simulator for the simulating experiment of image navigation and registration. Also, we do a research on the performance testing methods of the payload.Anti-interference ability of three-axis stabilized satellite is far worse than the spin satellite. Satellite attitude pose will changed due to the complex space environment, and the optical axis of imaging channel will be changed. The research of Image navigation and registration technical is necessary for obtaining high-quality remote sensing image. In this topic, according to the structure and characteristics of the payload of remote sensing satellite, we designed and developed a set of payload simulator to provide a physical environment for the study of the image navigation and registration. The main contents of the article are as follows.Firstly, On the basis of the full study of the structural characteristics of the imaging payload satellite channels, a block diagram of the system design is given. A SNR model of system stargazing is established. Based on the functions and specifications of the system, we proposed the designing scheme for each part of the system. Design suitable mechanical structure for the system to provide a reliable carrier for optical and electronic control.Secondly, after studying the development of the star simulator, we designed a star-sensitive mode hardware environment which is suitable for this system. By designing a compatible interface, the system can switch between two modes, which is good for the fully use of the resources and cost savings.Thirdly, an image acquisition system based on CMOS image sensor was designed and completed. Establish an information acquisition circuit noise model. Through experiments, we finished the measurement of the total noise of the Information acquisition system.Then we investigated the ability of the system stargazing, through stargazing imaging experiment. The performance of the scanning device was measured, combined with system features.After that, we got the edge image by the experiment. Then, the modulation transfer function curve was calculated by image processing method.