Geomagnetic models at low earth orbit and their use in attitude determination

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5 Citations (Scopus)

Abstract

In this study, three geomagnetic field models, T89, CHAOS-6 and IGRF-12 models are compared at LEO orbit altitudes with the satellite observations. Comparisons between the models and with the observations are made using the total magnetic field and the components during the geomagnetically disturbed and quiet times. Main interest is to see how the angle between the modelled and observed magnetic field vectors changes. The differences are important since satellite's attitude determination system strongly depends on the angle. Effects of geomagnetic activity on the angle is investigated using geomagnetic activity index and the position of the satellite which are inputs to the models. Comparisons are made between the models using root mean square error analysis. Differences between the model magnetic fields and those of observed are seen to increase when the geomagnetic activity occurs. We discuss the implications of these differences on the satellite attitude determination system.

Original languageEnglish
Title of host publicationProceedings of 8th International Conference on Recent Advances in Space Technologies, RAST 2017
EditorsM.F. Unal, A. Hacioglu, M.S. Yildiz, O. Altan, M. Yorukoglu
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages301-305
Number of pages5
ISBN (Electronic)9781538616031
DOIs
Publication statusPublished - 4 Aug 2017
Event8th International Conference on Recent Advances in Space Technologies, RAST 2017 - Istanbul, Turkey
Duration: 19 Jun 201722 Jun 2017

Publication series

NameProceedings of 8th International Conference on Recent Advances in Space Technologies, RAST 2017

Conference

Conference8th International Conference on Recent Advances in Space Technologies, RAST 2017
Country/TerritoryTurkey
CityIstanbul
Period19/06/1722/06/17

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Funding

ACKNOWLEDGMENTS This work is supported in part by TUBITAK Project, 113E595. The authors communicated with Chris Finlay about the CHAOS model, we thank him for clarifying all of the issues. We also thank Nikolai Tsyganenko for his kind advice and sharing the most updated version of his model. The spacecraft data have been obtained from NASA’s public website CDAWeb (cdaweb.nasa.gov). We thank for the data providers.

FundersFunder number
TUBITAK Project113E595

    Keywords

    • CHAOS
    • Earth's magnetic field
    • IGRF
    • T89
    • magnetospheric substorms
    • satellite attitude determination

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