The frame period of satellite image changes suddenly, a positioning aperture technique is implemented to reliably acquire the frame period.

卫星云图的帧周期变化，数据是突发性的。为了提取帧同步信号，研制出“定位孔径技术”，可靠地提取帧同步信号。

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After a period of tests in space, this new satellite has started to work with other Beidou satellites together.

经过一段时间的太空测试，这颗新卫星已经开始与其他北斗卫星一起工作。

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We are out here on a dedicated field campaign to measure the thickness of the ice to help calibrate and validate satellite thickness measurements in this period of advanced retreat.

我们在一特定区域去测量冰的厚度用来帮助校正卫星在这一区域之前的测量。

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During the period of satellite coverage, clear readvances were detected in the autumn-winter period, followed by recessions during summers.

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In 2012, the rate of ice loss for August was 91, 700 square kilometers (35, 400 square miles) per day, the fastest observed for the month of August over the period of satellite observations, the Center posted on their website Thursday.

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In the same period, the numbers of telco and satellite subscribers and broadcast-only homes all rose.

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