...Communications between satellites and the Earth are used to transmit observation data from Earth exploration satellites such as weather satellites and resource exploration satellites, and to send telemetry and command communications to check the status of and give instructions to satellites. Communications with planetary probes such as Mariner, Viking, and Voyager are the longest distance communications ever undertaken by mankind, and are achieved by using phase-locked receivers that can find and capture weak signals buried in background noise, and error-correcting codes that can correct errors in the received information, making it possible to achieve particularly sensitive reception methods. There are few examples of communication between spacecraft, except for the communication between the lunar lander and command module of the Apollo program, but in the future it will likely be used frequently for communication with Earth exploration satellites and the Space Shuttle orbiters. ... *Some of the terminology used to refer to "phase-locked receivers" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…人工衛星と地球との通信は,気象衛星や資源探査衛星のような地球探査衛星からの観測データの伝送,人工衛星の状態検査や指令を行うためのテレメトリー・コマンド通信に用いられている。また,マリナー,バイキング,ボエジャーのような惑星探査機との交信は,人類が行ったもっとも長距離の通信であり,背景雑音にうずもれた微弱な受信信号を見つけ出して捕捉(ほそく)する位相同期受信機や,受信した情報の誤りを訂正する誤り訂正符号を用いることにより特別に感度の高い受信方法を実現している。宇宙飛行体間の通信はアポロ計画の月着陸船と司令船との交信に見られる程度で例が少ないが,今後,地球探査衛星やスペースシャトルのオービターとの通信に多用されよう。… ※「位相同期受信機」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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