Attitude Determination Through Image Registration
- Paper number
IAC-08.C1.7.10
- Author
Ms. Rafia Mumtaz, Surrey Space Center, University of Surrey, United Kingdom
- Coauthor
Dr. Philip L. Palmer, Surrey Space Centre, University of Surrey, United Kingdom
- Year
2008
- Abstract
The present trend towards the use of small satellites with lower complexity and reduced operating cost has amplified the need to develop highly accurate and cost effective attitude determination system. Recently an image based approach to precisely determine the attitude of spacecraft has proven to be fruitful in terms of cost effectiveness and accuracy of attitude estimates. This approach is based upon a pair of angularly displaced earth pointing push broom sensors. This displacement causes a delay in the imaging of ground features in the two images. The delay causes the inter image offsets that are used to determine the spacecraft attitude. This paper generalizes this work by considering the mapping between shifts in row and column locations to the components of a general attitude matrix. We demonstrated this through a mathematical model that some measures provide an orthogonal basis for determining Euler axis direction. The method of image registration using SVD factorization is also described to extract the row and column offset data in a decoupled fashion. This registration method measures the shifts in frequency domain without interpolating the shifts estimates in spatial domain. The work will be further extended on the real images taken from Beijing-1 Earth observation spacecraft which provides both multispectral (MS) and panchromatic (PAN) data with spatial resolutions of 32m and 4m, respectively. The row and column shifts obtained from multispectral images will be used to determine the corresponding Euler axis direction which will define the spacecraft attitude.
- Abstract document
- Manuscript document
IAC-08.C1.7.10.pdf (🔒 authorized access only).
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