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Portable Network Graphic  |  1996-04-23  |  7KB  |  242x277  |  8-bit (43 colors)
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OCR: ANTENNA .............................................. ALL SPACECRAFT CARRY at least one antenna in order to send and receive radio signals to and from ground stations on the Earth or other spacecraft. High-gain antennas are used for communicating over larger distances, such as between the Earth and the outer planets. Low-gain antennas are used to communicate over shorter distances, such as between the Earth and the Moon.