24/7 Space News
TECH SPACE
China Achieves Milestone in Satellite-to-ground Laser Communications
Laser communication ground system emits uplink laser beams. (Image by AIR)
ADVERTISEMENT
China Achieves Milestone in Satellite-to-ground Laser Communications
by Staff Writers
Beijing, China (SPX) Jul 03, 2023

The Aerospace Information Research Institute (AIR) under the Chinese Academy of Sciences (CAS), in partnership with the Changguang Satellite Technology, successfully conducted a satellite-to-ground laser communication experiment at a speed of 10 gigabyte per second (GB/s) using self-developed 500-millimeter-diameter ground system and Jilin-1 satellite.

The experiment obtained good-quality satellite payload data, which will meet the requirements of high-standard commercial applications. This experiment demonstrated that China has successfully realized the engineering application of satellite-ground laser high-speed communication, marking that China's satellite-to-ground communication has entered the 10Gbps/s era.

LI Yalin, head of the laser ground system at AIR, said that global satellite-ground communication currently relies on microwave technology, although microwave bandwidth are limited, and cannot transmit massive amounts of data.

By contrast, laser spectrum resources are extremely rich, and can reach transmit speed up to 1000 times higher than existing microwave communications.

"If the bandwidth is compared to a road, then the X band is one lane, the Ka band is four lanes", he said, "lasers, meanwhile, can accommodate hundreds or even thousands of lanes.

"With laser communication, it is possible to transmit a high-definition movie within one second, which is 10 to 1,000 times faster than the current microwave communication method."

Because the divergence angle of laser is very small and the energy is highly concentrated, the power density received by the laser ground system is high, so the satellite can be lightweight and realize ultra-high-speed communication with much less volume, weight, and power consumption than the microwave communication payloads.

In addition, the use of laser as carrier to transmit and receive data can also significantly improve the security of satellite-to-ground communication, thanks to its strong anti-electromagnetic interference ability and good direction.

In line with commercial application standards, the team completed satellite-to-ground collaboration task planning and finished experimental processes such as bidirectional laser signal acquisition, stable signal chain building and adaptive optical correction, realizing high-speed and highly reliable satellite-to-ground laser communications under unsteady channels.

According to Prof. WU Yirong, Director-general of AIR, the massive data obtained by Chinese remote sensing satellites cannot be transmitted to ground in time, which had seriously affected the effectiveness of satellites.

"The establishment of a national ground station network for satellite laser communication based on the existing microwave ground stations, will help resolve bottlenecks in satellite-to-ground communications in China, and provide technical services across multiple applications", said Prof. Wu.

Related Links
Aerospace Information Research Institute
Space Technology News - Applications and Research

Subscribe Free To Our Daily Newsletters

RELATED CONTENT
The following news reports may link to other Space Media Network websites.
TECH SPACE
Australia-first communications network paves the way for high-speed data in space
Perth, Australia (SPX) Jun 30, 2023
The $6.5 million project, which has received a $4.4 million grant from the Australian Space Agency, $500,000 each from the Western Australian Government and The University of Western Australia, will employ a new technology that uses super-fast lasers to talk to satellites and spacecraft. It's called 'free-space optical communications', and it's 1000 times faster than the radio communications currently used to communicate in space. Project leader Associate Professor Sascha Schediwy, from The ... read more

ADVERTISEMENT
ADVERTISEMENT
TECH SPACE
Long history and bright future of space sample deliveries

SpaceX Dragon splashes down carrying 3,600 pounds of samples, experiments

SpaceX Dragon to return to Earth with experiments, samples from ISS

Virgin Galactic's use of the 'Overview Effect' to promote space tourism is a terrible irony

TECH SPACE
A space rocket hotter than the Sun

Unfavourable weather delays final Ariane 5 launch

ISRO terminates hot test for semi-cryogenic engine midway

Flight software for Artemis II meets testing checkpoint

TECH SPACE
Ingenuity phones home

Gullies on Mars could have been formed by recent periods of liquid meltwater

Up up up and finally over: Sols 3873-3875

Advanced space technology enabling 2024 ESCAPADE mission to Mars

TECH SPACE
Tianzhou 5 reconnects with Tiangong space station

China questions whether there is a new moon race afoot

Three Chinese astronauts return safely to Earth

Scientific experimental samples brought back to Earth, delivered to scientists

TECH SPACE
ESA unveils its comprehensive, high-resolution image library in a revamped platform

AST SpaceMobile and Maritime Launch Services Boost Capital with Stock Offerings

Apex raises $16M in Series A funding

AST SpaceMobile confirms 4G capabilities to everyday smartphones directly from space

TECH SPACE
Mountain of strategic metals stranded in DR Congo begins to shift

The chore of packing just got faster and easier

China Achieves Milestone in Satellite-to-ground Laser Communications

No additional radiation at cruising altitude off the coast of Brazil

TECH SPACE
A surprise chemical find by ALMA may help detect and confirm protoplanets

Reconstructing alien astronomers' view of our home galaxy's chemistry

New era of exoplanet discovery begins with images of 'Jupiter's Younger Sibling'

Evidence of the amino acid tryptophan found in space

TECH SPACE
Unveiling Jupiter's upper atmosphere

ASU study: Jupiter's moon Europa may have had a slow evolution

Juno captures lightning bolts above Jupiter's north pole

Colorful Kuiper Belt puzzle solved by UH researchers

Subscribe Free To Our Daily Newsletters


ADVERTISEMENT



The content herein, unless otherwise known to be public domain, are Copyright 1995-2023 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.