The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The E...The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The EUV camera is composed of a multilayer film mirror, a thin film filter, a photon-counting imaging detector, a mech- anism that can adjust the direction in two dimensions, a protective cover, an electronic unit and a thermal control unit. The center wavelength of the EUV camera is 30.2 nm with a bandwidth of 4.6nm. The field of view is 14.7° with an angular resolution of 0.08°, and the sensitivity of the camera is 0.11 count s-1 Rayleigh-1. The geomet- ric calibration, the absolute photometric calibration and the relative photometric cal- ibration are carried out under different temperatures before launch to obtain a matrix that can correct geometric distortion and a matrix for relative photometric correction, which are used for in-orbit correction of the images to ensure their accuracy.展开更多
Because of its own peculiarity,it determines that the supervision and education of the skilled workers school are more difficultthan the common middle schools.When coordinating sports activi- ties and the student supe...Because of its own peculiarity,it determines that the supervision and education of the skilled workers school are more difficultthan the common middle schools.When coordinating sports activi- ties and the student supervision work,first cognitions are unified on the conceqt,every unit cooqerates with each other. Second,extraxurricular sports activities are arravge scientifivally. Not only can the stu- dents take exercise,but also they can improve their professional skills.This needs the vigorous coopera- tion of the teacher in charge of a class Third,thoughteducation and matches are fused into one.Itshould make studentsupervision work,matches and extracirrular sports activities fuse into one and promote each other.展开更多
文摘The process of development and calibration for the first Moon-based ex- treme ultraviolet （EUV） camera to observe Earth＇s plasmasphere is introduced and the design, test and calibration results are presented. The EUV camera is composed of a multilayer film mirror, a thin film filter, a photon-counting imaging detector, a mech- anism that can adjust the direction in two dimensions, a protective cover, an electronic unit and a thermal control unit. The center wavelength of the EUV camera is 30.2 nm with a bandwidth of 4.6nm. The field of view is 14.7° with an angular resolution of 0.08°, and the sensitivity of the camera is 0.11 count s-1 Rayleigh-1. The geomet- ric calibration, the absolute photometric calibration and the relative photometric cal- ibration are carried out under different temperatures before launch to obtain a matrix that can correct geometric distortion and a matrix for relative photometric correction, which are used for in-orbit correction of the images to ensure their accuracy.
文摘Because of its own peculiarity,it determines that the supervision and education of the skilled workers school are more difficultthan the common middle schools.When coordinating sports activi- ties and the student supervision work,first cognitions are unified on the conceqt,every unit cooqerates with each other. Second,extraxurricular sports activities are arravge scientifivally. Not only can the stu- dents take exercise,but also they can improve their professional skills.This needs the vigorous coopera- tion of the teacher in charge of a class Third,thoughteducation and matches are fused into one.Itshould make studentsupervision work,matches and extracirrular sports activities fuse into one and promote each other.
