UMD Professors Publish Paper in the IEEE Geoscience and Remote Sensing Letters
Sergii Skakun (Assistant Research Professor) recently published a paper in the IEEE Geoscience and Remote Sensing Letters with colleagues Eric Vermote, Jean-Claude Roger and Chris Justice, entitled - 'Multispectral Misregistration of Sentinel-2A Images: Analysis and Implications for Potential Applications'. By virtue of its hardware design, detectors in the MultiSpectral Instrument (MSI) aboard Sentinel-2A remote sensing satellite exhibit a parallax angle that leads to subpixel shifts that are corrected with special preprocessing routines. However, these routines do not correct shifts for moving and/or high-altitude objects. The paper applies a phase correlation approach to detect subpixel shifts between B2 (blue), B3 (green), and B4 (red) Sentinel-2A/MSI images at 10- m spatial resolution. It is shown that shifts of more than 1.1 pixels can be observed for moving targets, such as airplanes and clouds, and can be used for cloud detection.