Observe the electricity structure of underground medium and change over time in resistivity of ground.

地电阻率是观测地下介质电性结构随时间的变化。

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A compact version will be sold for UAVs and helicopters, and a larger model for medium-altitude, long-endurance drones, ground surveillance and maritime patrol aircraft, Chaltiel said.

紧凑版本将被出售给无人机和直升机，较大版本将被出售给中高空，长航无人机，地面监视和海上巡逻机等。

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Under the award, SRA International will provide a low-cost ground surveillance (LCGS) solution for small - to medium-size airports in the national Airspace System.

根据合同，SRA国际公司将为国家空域系统的中小规模机场提供一个低成本地面监视(LCGS)解决方案。

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NovaSar-S will produce what are termed medium resolution pictures, where details on the ground larger than 6m across would be discernable.

BBC: Surrey to start making radar satellites

Dravid hit Panesar straight down the ground for six but with Dimi Mascarenhas doing his job of containing medium pace in partnership with the spinner, the rate climbed above eight.

BBC: England begin with resounding win

He would stand on tiptoe, bend double, lie on the ground, on his back or his stomach, take pan shots, medium shots, closeups, tracking shots, and panoramic shots, from above and from below, full face, from the side, from behind.

NEWYORKER: While the Women Are Sleeping