Subscribe free to our newsletters via your
. 24/7 Space News .




TECH SPACE
Satellite time transfer method based on two-way common-view comparison
by Staff Writers
Beijing, China (SPX) Jul 27, 2015


File image.

Time synchronization between ground and satellites is a key technology for satellite navigation system. With dual-channel satellite, a method called Two-Way Common-View (TWCV) satellite time transfer for Compass system is proposed in recent study.

The title of the paper related to the study is "The method and experiment analysis of two-way common-view satellite time transfer for compass system", which is written by LIU Li from Beijing Satellite Navigation Center and published in SCIENCE CHINA Physics, Mechanics and Astronomy 2015, 58.

The researcher combines both characteristics of satellite common-view and two-way satellite-ground time transfer to improve the precision of time transfer.

The principle of TWCV is that it can completely eliminate the influence of common errors, such as satellite clock offset, ephemeris errors, troposphere delay and station coordinates errors by satellite-ground two-way pseudo-range differencing and two stations common-view differencing.

At the same time, ionosphere delay related to signal frequency is also weakened significantly. So the precision of time transfer is improved much more greatly than before.

In this paper, the basic principle is introduced in detail, the effect of major errors is analyzed and the practical calculation model in the Earth-fixed coordinate system for this new method is provided. Finally, experiment analysis is conducted with actual Compass observing data.

The results show that the deviation and the stability of the satellite dual channel can be better than 0.1 ns, and the accuracy of the two-way common-view satellite time transfer can achieve 0.4 ns. All these results have verified the correctness of this TWCV method and model.

In addition, we compare this TWCV satellite time transfer with the independent C-band TWSTFT (Two-Way Satellite Time and Frequency Transfer). It shows that the result of the TWCV satellite time transfer is in accordance with the C-band TWSTFT result, which further suggests that the TWCV method is a remote high precision time transfer technique.

The research results in this paper are very important references for the development and application of Compass satellite navigation system.

This research was funded by the National Natural Science Foundation, China (No.41174027) and National 863 Project, China (No.2013AA122402) See the article: L. Liu, G. F. Tang, C. H. Han, X. Shi, R. Guo, L. F. Zhu. "The method and experiment analysis of two-way common-view satellite time transfer for compass system", Sci China-Phys Mech Astron. (2015) 58(8): 089502. doi: 10.1007/s11433-015-5679-2


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only


.


Related Links
Science China Press
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TECH SPACE
Yinchuan to host China-Arab satellite service industry demonstration site
Beijing (XNA) Jul 16, 2015
Yinchuan Economic and Technical Development Zone and China Alliance of Satellite Application Service signed a cooperation agreement lately on the establishment and operation of New Silk Road Satellite Service Industry Demonstration Area, Yinchuan Daily reported. The demonstration area will become the one and only base for China to provide Arabic countries and regions with satellite communi ... read more


TECH SPACE
NASA Could Return Humans to the Moon by 2021

Smithsonian embraces crowdfunding to preserve lunar spacesuit

Technique may reveal the age of moon rocks during spaceflight

NASA Sets Sights on Robot-Built Moon Colony

TECH SPACE
Opportunity heading into Marathon Valley

Curiosity Rover Inspects Unusual Bedrock

Antarctic Offers Insights Into Life on Mars

Earth and Mars Could Share A Life History

TECH SPACE
Space crew praises US-Russian 'handshake in space' 40 years on

Planetary Resources' First Spacecraft Successfully Deployed

NASA selects leading-edge concepts for continued study

US selects four astronauts for commercial flight

TECH SPACE
Chinese earth station is for exclusively scientific and civilian purposes

Cooperation in satellite technology put Belgium, China to forefront

China set to bolster space, polar security

China's super "eye" to speed up space rendezvous

TECH SPACE
Russia Launches New Crew to International Space Station

Russia Extends Life of International Space Station Until 2024

Russian, Japanese, US crew reach ISS despite minor mishap

Rocket carrying Russian, Japanese, US crew docks with ISS

TECH SPACE
India Earned Over $100Mln Launching Foreign Satellites

EUTELSAT 8 West B satellite arrive in French Guiana

Failed strut caused SpaceX rocket blast: CEO Elon Musk

Ariane 5 lofts two geo birds for teleco and weather customers

TECH SPACE
The Planetary Sweet Spot

Kepler Mission Discovers Bigger, Older Cousin to Earth

NASA discovers closest Earth-twin yet

New Method Finds Best Candidates for Telescope Time

TECH SPACE
First realization of invisible absorbers and sensors

'White graphene' structures can take the heat

Bringing back the magic in metamaterials

Battling Satellite Interference




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - 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. 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. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.