现在是最后一部分，就是，空气阻力如何影响轨道？
Now comes my last part, and that is, how does air drag influence trajectories?
这是一个只有18英尺的小型太阳帆，旨在增加大气阻力以帮助卫星脱离轨道。
These are only 18 feet on a side and designed to increase atmospheric drag and thus help satellites out of orbit.
黄金轨道上，击中附近的1825水平的目标阻力。
Gold is on track to hit target resistance near the 1825 level.
基于经典轨道要素偏差法分析了相对运动特性和大气阻力对相对运动的影响。
By using the classical orbit element differences method, the periodic characteristics of relative motion and the influence of atmospheric drag on relative motion were analyzed.
大气最外层的空气非常稀薄，但空气分子仍能产生阻力减慢人造卫星的速度，这样工程师们就得定期把它们推回到其正确的轨道上。
Air in the atmosphere's outermost layer is very thin, but air molecules still create drag that slows down satellites, requiring engineers to periodically boost them back into their proper orbits.
轨道结构与桥梁共同作用的力学计算模型是解决轨道纵向位移阻力与梁轨相对位移相互作用计算问题的关键。
The key is that to resolve the interaction between bridge and track, that the mechanics model of this interaction, as well as rail longitudinal resistance to displacement between rail and beam.
最终空气阻力会使它们高度降低、出轨道，在重返地表的过程中，被浓密的低层大气燃烧殆尽。
Eventually atmospheric drag removes them from orbit by lowering their altitudes until they burn up on reentry into the dense lower atmosphere.
人造地球卫星的轨道由于大气阻力和地球引力场等因素的摄动，其形状和近地点位置将不断改变。
The shape and perigee of artificial satellite orbits shall continually variate due to caused by the atmospherical drag and the earth gravity.
航天飞机轨道器设置阻力伞的目的在于增加其着陆的安全性。
The desire to increase landing safety margins for the Space Shuttle Orbiter led to decision to implement a Drag Parachute System into the Orbiter Vehicle.
标准轨道法。 给出了再入走廊的计算方法，阐述了参考阻力加速度-速度剖面的规划和跟踪问题。
The nominal trajectory-based techniques include the methods to compute the reentry flight corridor, the reference trajectory and the track law of the reference trajectory.
该机结构紧凑，刚性好，便于移动，密封油槽式轨道，齿链驱动，行走阻力小，经久耐用，切割精度好。
The machine structure is compact, rigid good, easy to move, sealed tank-style tracks, tooth chain drive, walk the resistance is small, durable, cutting accuracy and good.
桥梁和轨道的联结采用非线性梁单元模拟，其材料弹性模量和屈服应力通过轨道纵向位移阻力与梁轨相对位移关系的双折线化确定；
The coupling between bridge and track adopts by beam unit, modulus of electricity of and yielding stress according to the broken line of the non-liner rail longitudinal resistance of displacement.
求出位系数模型和大气阻力引起的重力梯度卫星的轨道误差；
The orbital errors due to the potential coefficient model and atmospheric drag for the gradiometry satellite are obtained;
真空管道系统就是在现有的轨道交通基础上减小了空气阻力，其本质还是属于轨道交通的范畴。
Now, this system is called Evacuated Tube Transportation (ETT), which monishes the air resistance of rail transit, but it essentially belongs to the category of rail transit all the same.
最终空气阻力会使它们高度降低、出轨道，在重返地表的过程中，被浓密的低层大气燃烧殆尽。
Evually atmospheric drag removes them from orbit by lowering their altitudes until they burn up on reentry into the dense lower atmosphere.
研究了在高空电离层中运动的带电荷的卫星受电感应阻力后对轨道根数产生的摄动影响。
The influences of the electronic induction drag on the variation of the orbital elements of a charged satellite moving in a magnetic-field-free ionosphere are studied.
空气的离解和电离导致轨道器的阻力系数比完全气体计算值低，压心位置前移。
Dissociation and ionization of air bring on lower drag coefficients of the orbiter than that obtained from perfect gas model, while the location of pressure center moves forward.
空气的离解和电离导致轨道器的阻力系数比完全气体计算值低，压心位置前移。
Dissociation and ionization of air bring on lower drag coefficients of the orbiter than that obtained from perfect gas model, while the location of pressure center moves forward.
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