The only problem is that it needs to be supremely accurate, since the margin for error on a curling shot is much smaller at altitude.

唯一的问题在于它需要无比的精确，因为在高海拔处曲球的犯错空间要小得多。

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Analyses show that a measurement of 5 points altitude in the free flight path, the impact position error may be estimated probably.

分析表明，在自由飞行段5点测高可以估出落点偏差。

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The working principle of the altitude maintenance system was introduced, the related mathematical models were built up, and the problem of static error of system was solved.

介绍了飞机高度保持系统的工作原理，建立模拟机高度保持系统的数学模型，分析解决了系统中的静差问题，并对该模型进行仿真验证。

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