DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides

Hauschild, André and Montenbruck, Oliver (2021) Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides. Navigation, Journal of the Institute of Navigation. Wiley. doi: 10.1002/navi.416. ISSN 0028-1522.

[img] PDF - Published version

Official URL: https://onlinelibrary.wiley.com/doi/10.1002/navi.416


The availability of orbit information with high precision and low latency is a key requirement for many Earth‐observation missions, predominantly in the field of radio occultation. Traditionally, precise orbit determination solutions of low‐Earth orbit (LEO) satellites are obtained offline on ground after downloading GNSS measurements and auxiliary spacecraft data to the processing center. The latency of this processing depends on the frequency of LEO downlink contacts and the availability of precise GNSS orbit and clock products required for the orbit determination process. These dependencies can be removed by computing the precise orbit determination solution on board the satellite using GNSS broadcast ephemerides. In this study, both real data and simulated measurements from a representative LEO satellite are processed in a flight‐proven Kalman‐filter algorithm. The paper studies the use of GPS, Galileo and BeiDou‐3 for real‐time orbit determination in different combinations with simulated measurements. Results show that use of dual‐frequency observations and broadcast ephemerides of Galileo and BeiDou‐3 leads to a significant reduction of 3D rms orbit errors compared to GPS‐only processing. An onboard navigation accuracy of about one decimeter can be achieved without external augmentation data, which opens up new prospects for conducting relevant parts of the science data processing in future space missions directly on board a LEO satellite.

Item URL in elib:https://elib.dlr.de/141690/
Document Type:Article
Title:Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hauschild, Andréandre.hauschild (at) dlr.dehttps://orcid.org/0000-0002-0172-3492
Montenbruck, OliverOliver.Montenbruck (at) dlr.dehttps://orcid.org/0000-0003-4783-745X
Journal or Publication Title:Navigation, Journal of the Institute of Navigation
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1002/navi.416
Keywords:broadast ephemerides, precise orbit determination, real‐time navigation, signal‐in‐space range error
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Raumflugbetrieb / Missionstechnologie (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > Space Flight Technology
Deposited By: Hauschild, André
Deposited On:07 Apr 2021 09:50
Last Modified:07 Apr 2021 09:50

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.