China's first successful lunar laser ranging accomplished
by Staff Writers
Beijing (XNA) Jan 29, 2018
China has accomplished its first successful Lunar Laser Ranging (LLR), with a 1.2-meter telescope laser ranging system.
Based on the signals of laser pulses reflected by the lunar retro-reflector planted by the U.S. manned mission Apollo 15, the applied astronomy group from the Yunnan Observatories measured the distance between the Apollo 15 retro-reflector and the Yunnan Observatories ground station to be 385823.433 kilometers to 387119.600 kilometers, from 9:25 p.m. to 10:31 p.m. Beijing Time, on Jan. 22, 2018.
Theoretically, LLR measures the distance between the Earth and the moon by calculating the time a laser pulse takes to travel from a ground station on Earth to a retro-reflector on the moon and back again.
LLR technology traverses fields such as laser and photoelectric detection, automatic control and space orbiting. Compared to other methods, LLR can achieve the highest accuracy of distance measurement between the Earth and the moon.
"Although LLR in China has not achieved the same level as pioneering countries like the U.S., our initial success still means the progress, which started from scratch," said Li Yuqiang, an associate researcher with Yunnan Observatories.
Results of LLR are vital to advanced research in astro-geodynamics, Earth-moon system dynamics and lunar physics. Until China made its first LLR, only the United States, France and Italy had successfully harnessed the technology.
The LLR was conducted in the context of China preparing to launch the Chang'e-4 lunar probe in 2018. The lunar probe will undertake the first soft landing on the far side of the moon, conduct in-situ and roving detection, as well as relay communication at the Earth-moon Lagrangian 2 (L2) point.
"In the near future, China will plant its own retro-reflector on the moon, which will further boost the development of LLR in China," Li said.
Source: Xinhua News
Beijing (XNA) Jan 23, 2018
Taikonaut Zhang Xiaoguang prepared for 15 years to go into space. Zhang, one of the 14 pilots recruited as China's first batch of taikonauts, was 32 when he joined the Taikonaut Corps of People's Liberation Army at its founding in 1998. In order to pass the more than 30 fundamental courses that are required of every taikonaut, he wrote over 200,000 Chinese characters of study notes. ... read more
Chinese Lunar Exploration Program
The Chinese Space Program - News, Policy and Technology
China News from SinoDaily.com
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - 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.