发射仰角 meaning in English

elevation firing angle
launching elevation

The shooting elevation of rocket has a great influence on the effect the principle chosen the optimal shooting elevation was given and the mechanism of rainfall enhancement by agl - loading rockets was also analyzed in this paper
给出了火箭最佳发射仰角的选取原则，并分析了火箭催化增雨的机理。以期为提高人工增雨火箭作业的效果提供科学技术参考。
Detailed simulations on rain enhancement with a rocket fired at different time , elevations , distances and seeded in different areas of cloud were analyzed . the results show that a positive effect of rainfall enhancement can be obtained when seeding in suitable parts of the clouds
结果表明，利用火箭在对流云中适宜的部位进行人工播云催化作业是有正效果的；在云发展阶段进行催化，增雨效果较好；火箭发射仰角对增雨的效果有很大影响。