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客户可能的轨道需求 #81

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StarCycle opened this issue May 5, 2022 · 1 comment
Open

客户可能的轨道需求 #81

StarCycle opened this issue May 5, 2022 · 1 comment

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@StarCycle
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  1. 星座部署,包括单轨道面相位调整和多轨道面升交点赤经漂移。例子:planet采购D-orbit的fast dispersion服务
  2. 编队飞行卫星的初始部署。有助于干涉测量,或光学卫星编队多角度观测目标,或空间多点探测。例子:Hawkeye360和Kleos采购Spaceflight的Sherpa
  3. 太阳同步晨昏轨道需求:能源需求较高的星(如SAR星),太阳观测卫星,光学空间态势感知卫星。例子:国家的高分三号雷达星和羲和号太阳观测卫星采用该轨道
  4. 低轨道需求(<500km):重力测量卫星(如CHAMP, GOCE),大气测量卫星(如QB50, 330km),短期实验需要尽快离轨的卫星(如实践10, 二院的充气式再入实验星)
  5. 采用低倾角以躲避南大西洋异常区的精密科学卫星:爱因斯坦探针(软X射线望远镜),国内的GECAM双星(引力波暴监测)
@StarCycle
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  1. 太阳同步回归轨道:星下点轨迹在一定周期后会高精度重复。例如Landsat(16天回归),ICESat(91天回归), ENVISAT(35天回归),SPOT(26天回归),中巴地球资源卫星(26天回归). 为了到达特定回归周期、圈数的轨道,需要调整轨道高度。比如在太阳同步的前提下,如果回归周期=1天,圈数=15, 则圆轨道高度需要为568.132km;如果回归周期=2, 回归圈数=29,则圆轨道高度需要为727.092km
  2. 较高轨道需求: 为了较低的星下点移动速度, 或者减少地球摄动/大气阻力的影响(便于精密定轨,便于减少轨道纠正所需的速度增量)。例如海洋二号(975km)

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