出典:Wikipedia
出典:『Wikipedia』 (2011/01/04 14:42 UTC 版)
From the article: "Telstar would receive microwave signals from a ground station equipped with a helical antenna, amplify them, and rebroadcast them. During Project Echo, Telstar was able to successfully send and receive communications using light wave as a transmission medium, between Echo I and Telstar." I highly HIGHLY doubt this. Visible light (lasers) is only now beginning to be used in experimental satellite communications.--Deglr6328 21:26, 23 Jul 2004 (UTC)