Both satellites were used for telecommunications, with the us satellite an active part of Iridium's network of 66 craft which provide satellite telephone access to more than 250, 000 people worldwide.

两卫星都是用于电信，美国卫星还是铱网络66颗卫星的一部分，用于提供世界超过250,000人的卫星电话服务。

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Telstar is launched as the first "active" communications satellite—active as in amplifying and retransmitting incoming signals, rather than passively bouncing them back to Earth.

这颗卫星上装有无线电收发设备和电源，可对信号接收、处理、放大后再发射，从而大大提高了通信质量。

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Hot areas glow orange in infrared light, revealing the active fire front on the south and west sides of the burned area. (the orange horizontal stripes are satellite sensor artifacts.)

红外线领域为橙色，主要活跃在燃烧区域的南面和西面(橙色横纹为人造的卫星传感器)。

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Of the four mobile satellite services companies now active, two, Iridium and ICO Global Communications, are in bankruptcy proceedings.

FORBES: Down To Earth