Putin had arrived for the dive a day after clipping a satellite transmitter onto a Beluga whale called on Chkalov island in Russia's far east.

此次潜水的前2天，普京还曾到俄罗斯的远东地区契卡洛夫岛(Chkalov island)，亲自为一头大白鲸安装无线电信号发射器。

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This device, developed at the Joint Non-Lethal Weapons Directorate in Quantico, Virginia, is a microwave transmitter the size and shape of a small satellite dish that pivots on top of an armoured car.

这种由弗吉尼亚州匡恩提科市的非杀伤性武器联合局研发的装置，是一种安装在装甲车顶部的可转动的微波发射机，其形状与大小如同一只小型碟式卫星电视天线。

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This article introduces a kind of design options about the transmitter of high speed digital transmissions in satellite communications, and gives the main hardware realization of the option.

提出了一种卫星通信中高速数据传输发射机的设计方案，并给出了此方案具体的硬件实现。

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Without being prescriptive it is expected that a typical station configuration will consist of a primary tide gauge, two under water pressure sensor (secondary tide gauge), data logger, DCP geostationary satellite transmitter, modem, battery backup, solar panel, cables, mountings.

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By cross-referencing the satellite data with a ground-based transmitter of precisely known location, the accuracy can be boosted tenfold or more.

ECONOMIST: Global positioning: Accuracy is addictive | The

This type of tag, however, requires a buoy to carry the aerial, and this is attached to the shark by a ten-metre-long line. (The line is needed because the sharks themselves rarely break the surface, and the transmitter cannot signal to the satellite from under water.) Two American biologists, Scott Eckert and Brent Stewart, from the Hubbs-Sea World Research Institute in San Diego, have had some success with satellite tracking.

ECONOMIST: Whale sharks