This acceleration that is necessary to make the change in the velocity vector is always pointing towards the center of the circle.

要促使速度矢量，产生如此的变化，所需的加速度，总是指向圆心。

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Based on analyzing the system pointing and track error, software and hardware correction measures are designed, which improve the antenna track velocity and pointing accuracy.

对指向跟踪误差进行了分析，并采用软件和硬件两个方面进行了误差消除设计，提高了天线的跟踪速度和指向精度。

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