NDLI: Precise positioning of a geostationary data relay using LEO satellites

Content Provider	IEEE Xplore Digital Library
Author	Knogl, J.S. Henkel, P. Gunther, C.
Copyright Year	2011
Description	Author affiliation: Institute for Communications and Navigation, Technische Universität München, Germany (Knogl, J.S.; Henkel, P.; Gunther, C.)
Abstract	Earth observation uses a large number of Low Earth Orbiting (LEO) satellites (ca. 400). The increasing resolution of their instruments has inflated the data volumes that need to be transmitted. The low altitudes limit the contact times, which is challenging both with respect to the data volumes and delay until data can be transmitted. Geostationary satellite (GEO) relaying is thus a promising alternative. In order to allow pre-compensation of Doppler Shift at the LEO side and to synchronize the transmission from the LEOs to the GEO, the positions and relative velocities of the satellites have to be known. LEOs can be positioned today with centimetre accuracy by GPS. GEOs orbit on higher altitudes than GPS satellites and therefore face problems using GPS signals. Conventional methods allow GEO positioning from ground with accuracies in the km range. In this paper, a new concept of GEO precise positioning using communication channels of LEO satellites is presented. Simulations show that Kalman filtered pseudoranges lead to positioning errors in cm range. A new method based on Newton algorithm allows to determine the Keplerian parameters and their linear drifts in order to predict the GEO position.
Starting Page	325
Ending Page	328
File Size	169293
Page Count	4
File Format	PDF
ISBN	9781612849492
ISSN	13342630
e-ISBN	9789537044121
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-14
Publisher Place	Croatia
Access Restriction	Subscribed
Rights Holder	ELMAR (Electronics in Marines)
Subject Keyword	Positioning Accuracy Satellite broadcasting Low earth orbit satellites GEO satellite Orbit determination Orbits Relays Global Positioning System
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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