My dissertation was entitled Automated Selection of Suitable Atmospheric Calibration Sites for Satellite Imagery, was completed in 2010 and was supervised by Prof. E. J. Milton. It received a mark of 81% (the second highest mark in my year). I have written a conference paper based on my dissertation for presentation at RSPSoc 2010 and am hoping to develop this into a longer paper for an academic journal.
A method was developed to automatically select suitable atmospheric calibration sites for satellite imagery, using a combination of various processing techniques followed by a fuzzy classification using eCognition. Desirable characteristics for calibration sites were identified from the literature, and implemented in a set of procedures combining ENVI/IDL processing routines and object-based classification using eCognition. Getis-Ord statistics were used to assess local patterns of spatial uniformity, and endmember abundances (extracted using the SMACC algorithm) were used in a novel method to ensure a spread of calibration sites throughout the brightness range for each band. The method was tested on a selection of medium- and high-resolution satellite imagery, and assessments of the quality of the selected calibration sites were provided by comparison with the identified desirable criteria, independent assessment by an expert and by performing an empirical line method calibration using the selected sites. Results showed that the selected calibration sites were generally good calibration sites. The calibration produced an average accuracy of 38%, which compares poorly with results in the literature. However, this is unlikely to be a true reflection of the quality of the calibration sites, as many other factors combined to produce poor accuracies.