Abstract


The AirSpex 2005 Projct was an airborne remote sensing campaign in April and May of 2005. A total of three flights were undertaken, two of which were focused on acquiring a combination of high spatial and spectral resolution images from two imaging spectrographs colocated with professional digital cameras, while the third aimed to acquire high resolution digital images and transfer them to a ground-based server via a satellite telephone link. Hyperspectral data from the first flight, whose target was Longyeardalen, were chosen for spectral and classification analysis. Red-Green-Blue (RGB) composite images contructed from images at specific wavelengths show realistic depictions of scenery and groundcover. However, some color-separation, owing to errors in the image-forming process and small variation in vertical magnification as a function of wavelength, was observed. The hyperspectral data volume chosen for classification contained many different objects in the scene, in addition to some specular reflection of sunlight, making classification difficult. Although some ground cover was unambiguously classified using the constructed training set, the majority of it was not, indicating a need to further refine the training set, possibly with the aid of a rigorous thresholding and segmentation scheme. The satellite image upload was successful, but somewhat lacking in data transfer speed.


(Finished 10.05.05 -JMH)