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A kinematic numerical camera model for the SPOT-1 sensor

O'Neill, Mark Anthony; (1992) A kinematic numerical camera model for the SPOT-1 sensor. Doctoral thesis (Ph.D), UCL (University College London). Green open access

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Abstract

A novel method for modelling linear push-broom sensors has been developed. A numerical model which incorporates the satellite attitude and position data is used to compute the absolute orientation. This method makes a break with traditional photogrammetric practice, in that instead of using an approach based on collinearity equations, the absolute orientation is computed iteratively using a numerical multi-variable minimisation scheme. All current implementations of the model use the Powell direction-set method, but in principle, any multivariable minimisation scheme could be substituted. The numerical method has significant advantages over the collinearity approach. The number of ground control points needed to form an accurate model is reduced and the numerical approach offers a superior basis for the development of general purpose multi sensor modelling software. In order to test these assertions, a numerical model of the SPOT-1 sensor was coded and tested against a pre-existing collinearity based model. Exhaustive tests showed the numerical model, using 3 or fewer ground control points, consistendy equaled or bettered the performance of the earlier model, using between 6 and 15 ground control points, on the same test data. A general purpose sensor modelling system was developed using the code developed for the initial SPOT-1 model. Currently this system supports many rigid linear sensors systems including SPOT-1, SPOT-2, FTIR, MISR, MEOSS and ASAS. Further extensions to the system to enable it to model non-rigid linear sensors such as AVHRR and ATM are planned. Work to enable the system to perform relative orientations for a variety of sensor types is also ongoing.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: A kinematic numerical camera model for the SPOT-1 sensor
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Thesis digitised by ProQuest.
Keywords: Applied sciences; Linear push-broom sensors
URI: https://discovery.ucl.ac.uk/id/eprint/10113023
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