On July 9, the Pakistan Remote Sensing Satellite No. 1 was successfully launched into the orbit. This is the first export-oriented remote sensing international star designed by China for 7 years. The two full-color multi-spectral cameras equipped with this satellite have a resolution better than 1 meter. The imaging width is up to 60 kilometers. Some experts have evaluated that cameras that can achieve such indicators are only two in the field of international commercial remote sensing.
To create a 'single two no three' camera, is the research team of the 508 Institute of China Aerospace Science and Technology Group. When the Science and Technology Daily reporter asked about the past year's research process, the team's friends summed up everything by name: '508 The English name is 'BISME', the pronunciation is 'forced me' (forced me). So we have to use the spirit of 'force yourself' to make the product good.'
First, 'Ba-English'
In April 2016, the 'Ba Yao 1' camera project was officially launched. The satellites generally required the completion of the delivery of two positive cameras in July 2017. At the same time, they must complete the relevant English technical documents for compliance, and fully cooperate with the supervision of the users. .
For the young camera development team, this is undoubtedly a big test. Surprisingly, the first thing they encountered was not the technical hurdle, but the language.
In the project, the Pakistani government hired a French consultant with rich experience in satellite development. The exchange team and the other side communicated with each other. The English pronunciation of the other party is not the American or English style they are familiar with, but the Pakistani style with a serious accent. English. Everyone breathed and listened carefully, but still heard the fog.
The project command party Yi Han decided to solve this problem. She invited a speaking teacher, set up an oral English class, and found Pakistani and French accent listening materials to help people gradually become familiar with the pronunciation characteristics of Ba, French accent. The teacher also taught the professional terminology commonly used in the contract. After a period of targeted training, the team members progressed rapidly and basically communicated smoothly with the foreign party.
'Do not force everyone to cross the language barrier, our communication is a problem, can not imagine how to develop smoothly. ' Party Yihan laughed.
Carefully designed to create a 'longevity' lens
During the implementation of the project, the development team strictly controls the quality, and each link pursues perfection. The team's production and maintenance manager Cai Yuanyuan is like the same never-ending 'forced me small motor', tracking product quality in real time, any problem will be the first Time is handled according to quality management requirements, never to the next day.
After the camera was delivered, it entered the satellite assembly stage. The development team learned that one of the cables used had a process defect on other models. Although the cable had passed the comprehensive test and there was no problem, they decided to replace it. After the cable, the development team re-tested all the items of the camera subsystem and compared it with the previous test data to ensure the quality is up to standard.
High-resolution satellites are extremely demanding for micro-vibration. Designers undertaking micro-vibration analysis perform modeling and analysis from flutter sources, propagation paths, and camera responses based on micro-vibration characteristics, while referring to the micro-vibration of the baseline camera in orbit. Performance, verify the correctness of the model. After careful analysis of the test data, it is concluded that the user's requirements are fully met.
Since the design life of 'Bayao No.1' has been 7 years, the development team carefully designed the use strategy of the camera in the case of monorail and continuous multi-track, and analyzed in detail the effects of space radiation environment and atomic oxygen on electronic devices and optical lenses. To ensure that the product can meet the service life requirements.
Exploring a new model for export camera development
The 'Ba Yao No. 1' camera project has created a new development model for us. ' The project leader Hu Yongli said.
The consultants hired by the Palestinians are all the old experts who have participated in the development of satellites in France. They have a deep knowledge in the field of remote sensing. They have raised the whole process from the overall, sub-system, to stand-alone, production and insurance, from design, process to raw materials. Strict requirements. This cooperation has made the project development process more in line with international standards, created China's international export camera compliance standards, and formed a complete document system, laying the foundation for the subsequent development of international satellite cameras.
'Communicating with foreign experts not only improved the team's ability to develop, but also broadened our horizons. It also demonstrated the technical strength of China's space and the spirit of 'forced me'. 'Hu Yongli said, 'We will take this as an opportunity, 撬Move the larger international commercial remote sensing market, in the product development, performance, on-orbit after-sales service and other aspects of the international standard.
