他的职责有引导空袭和必要时的空中支援，保证对地面轰炸准确度并防范友军的火力。
His duties include calling in airstrikes and air support when necessary, guaranteeing the accuracy of bombing on the ground and guarding against incidents of friendly fire.
GPS接收机的校正可以对这方面的误差做出解释，但尽管如此，GPS时钟信号只能保证准确度为100纳秒的级别。
GPS receivers make corrections to account for this, but nonetheless the clock signals are only guaranteed to be correct on the order of 100 nanoseconds.
如果这一误差相对于源信号或测量值非常大，则可测量接触电势，并对其进行补偿，以保证系统准确度。
If the error is significant with respect to the source or measure value, the contact potential can be measured and compensated for to preserve system accuracy.
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