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我国航天事业,促进了国民经济和社会的持续发展,带动了科学技术的全面进步,增强了国防实力,提高了国家的综合国力和国际地位,为中华民族屹立于世界民族之林作出了重要贡献。 顺行轨道 顺行轨道的特征是轨道倾角即轨道平面与地球赤道平面的夹角小于90°。在顺行轨道上运行的卫星,绝大多数离地面较近,高度仅为数百公里,故而通常将这种轨道称为近地轨道。我国地处北半球,要把卫星送入这种轨道,运载火箭要朝东南方向发射,这样能够
China’s space undertaking promoted the sustained development of the national economy and society, spurred the all-round progress of science and technology, strengthened the national defense strength and enhanced the country’s overall national strength and international status, making an important contribution to the Chinese nation’s standing in the world’s nations . The characteristics of antegrade orbit is that the orbital inclination is less than 90 ° between the orbital plane and the earth’s equatorial plane. Most of the satellites that operate on orbiting orbits are close to the ground at a height of only a few hundred kilometers and are often referred to as near-Earth orbits. My country is located in the northern hemisphere, and it is imperative that the satellites enter this orbit and the launch vehicle be launched in the southeast direction so that