以低加速度从航天飞机的低地球轨道转移到对地静止轨道，需要有限多次点火。
Finite multiple burn method is used for the transfer from Space Shuttle low earth orbit to the geostationary orbit with low accelerations.
但是时间常数越低，允许通过的水平加速度噪声就越多。
But the lower the time constant, the more horizontal acceleration noise will be allowed to pass through.
加速度传感器数值可能被颠簸和噪音影响。应用低通过滤器在信号上可以是它平滑，并摆脱高频噪音的干扰。
Accelerometer readings can be jerky and noisy. Applying low-pass filtering on the signal allows you to smooth it and get rid of high frequency noise.
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