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Sep 14, 2023

火星のブロードバンド: NASA の深宇宙通信用レーザー ブースト

ジェット推進研究所より2023年8月31日

この秋に開始される NASA の深宇宙光通信 (DSOC) プロジェクトは、宇宙データ伝送の強化におけるレーザーの能力を探求する予定です。

NASAEstablished in 1958, the National Aeronautics and Space Administration (NASA) is an independent agency of the United States Federal Government that succeeded the National Advisory Committee for Aeronautics (NACA). It is responsible for the civilian space program, as well as aeronautics and aerospace research. Its vision is "To discover and expand knowledge for the benefit of humanity." Its core values are "safety, integrity, teamwork, excellence, and inclusion." NASA conducts research, develops technology and launches missions to explore and study Earth, the solar system, and the universe beyond. It also works to advance the state of knowledge in a wide range of scientific fields, including Earth and space science, planetary science, astrophysics, and heliophysics, and it collaborates with private companies and international partners to achieve its goals." data-gt-translate-attributes="[{"attribute":"data-cmtooltip", "format":"html"}]">NASA is testing technologies in space and on the ground that could increase bandwidth to transmit more complex science data and even stream video from MarsMars is the second smallest planet in our solar system and the fourth planet from the sun. It is a dusty, cold, desert world with a very thin atmosphere. Iron oxide is prevalent in Mars' surface resulting in its reddish color and its nickname "The Red Planet." Mars' name comes from the Roman god of war." data-gt-translate-attributes="[{"attribute":"data-cmtooltip", "format":"html"}]">火星。

今秋に開始予定の NASA の深宇宙光通信 (DSOC) プロジェクトでは、宇宙で使用されている現在の無線周波数システムの容量をはるかに超えて、レーザーがどのようにデータ伝送を高速化できるかをテストします。 技術デモンストレーションとして知られるDSOCは、NASAが宇宙飛行士を火星に送るとき、人類の次の大きな飛躍をサポートするブロードバンド通信への道を開くかもしれない。

DSOC 近赤外線レーザー トランシーバー (データを送受信できるデバイス) は、10 月に金属が豊富な同名の小惑星に向けて打ち上げられる NASA のプシュケ ミッションに「便乗」します。 旅の最初の2年間、トランシーバーは南カリフォルニアの2つの地上局と通信し、高感度の検出器、強力なレーザー送信機、トランシーバーが深宇宙から送信する信号を解読する新しい方法をテストします。

深宇宙光通信 (DSOC) フライト トランシーバーは、JPL のクリーン ルーム内で見られるように、プシュケ宇宙船の大きなチューブ状のサンシェードと望遠鏡の中にあります。 以前の写真の挿入図は、宇宙船に統合される前のトランシーバー アセンブリを示しています。 クレジット: NASA/JPL-カリフォルニア工科大学

NASA は、宇宙機関が半世紀以上にわたって依存してきた電波の帯域幅を超える可能性があるため、レーザーまたは光通信に焦点を当てています。 無線通信と近赤外線レーザー通信はどちらも電磁波を使用してデータを送信しますが、近赤外線はデータを非常に密な波に詰め込むため、地上局は一度により多くのデータを受信できます。

「DSOC は、今日宇宙で使用されている最先端の無線システムの 10 ~ 100 倍のデータ返信能力を実証するように設計されました」と、南カリフォルニアにある NASA ジェット推進研究所の DSOC プロジェクト技術者アビ ビスワス氏は述べています。 「地球近傍軌道と月周回衛星の高帯域幅レーザー通信は実証されていますが、深宇宙では新たな課題が生じています。」

深宇宙を目指すミッションはこれまで以上に多くなっており、複雑な科学測定、高精細画像、ビデオの形で過去のミッションよりも飛躍的に多くのデータが生成されることが約束されています。 したがって、DSOC のような実験は、NASA が将来的に宇宙船や地上システムで日常的に使用できる技術を進歩させる上で重要な役割を果たすことになります。

The transceiver riding on Psyche features several new technologies, including a never-before-flown photonA photon is a particle of light. It is the basic unit of light and other electromagnetic radiation, and is responsible for the electromagnetic force, one of the four fundamental forces of nature. Photons have no mass, but they do have energy and momentum. They travel at the speed of light in a vacuum, and can have different wavelengths, which correspond to different colors of light. Photons can also have different energies, which correspond to different frequencies of light." data-gt-translate-attributes="[{"attribute":"data-cmtooltip", "format":"html"}]">photon-counting camera attached to an 8.6-inch (22-centimeter) aperture telescope that protrudes from the side of the spacecraft. The transceiver will autonomously scan for, and “lock” onto, the high-power near-infrared laser uplink transmitted by the Optical Communication Telescope Laboratory at JPLThe Jet Propulsion Laboratory (JPL) is a federally funded research and development center that was established in 1936. It is owned by NASA and managed by the California Institute of Technology (Caltech). The laboratory's primary function is the construction and operation of planetary robotic spacecraft, though it also conducts Earth-orbit and astronomy missions. It is also responsible for operating NASA's Deep Space Network. JPL implements programs in planetary exploration, Earth science, space-based astronomy and technology development, while applying its capabilities to technical and scientific problems of national significance." data-gt-translate-attributes="[{"attribute":"data-cmtooltip", "format":"html"}]"JPL’s Table Mountain Facility near Wrightwood, California. The laser uplink will also demonstrate sending commands to the transceiver./p>NASAEstablished in 1958, the National Aeronautics and Space Administration (NASA) is an independent agency of the United States Federal Government that succeeded the National Advisory Committee for Aeronautics (NACA). It is responsible for the civilian space program, as well as aeronautics and aerospace research. Its vision is "To discover and expand knowledge for the benefit of humanity." Its core values are "safety, integrity, teamwork, excellence, and inclusion." NASA conducts research, develops technology and launches missions to explore and study Earth, the solar system, and the universe beyond. It also works to advance the state of knowledge in a wide range of scientific fields, including Earth and space science, planetary science, astrophysics, and heliophysics, and it collaborates with private companies and international partners to achieve its goals." data-gt-translate-attributes="[{"attribute":"data-cmtooltip", "format":"html"}]">NASA is testing technologies in space and on the ground that could increase bandwidth to transmit more complex science data and even stream video from MarsMars is the second smallest planet in our solar system and the fourth planet from the sun. It is a dusty, cold, desert world with a very thin atmosphere. Iron oxide is prevalent in Mars' surface resulting in its reddish color and its nickname "The Red Planet." Mars' name comes from the Roman god of war." data-gt-translate-attributes="[{"attribute":"data-cmtooltip", "format":"html"}]"Mars./strong>

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