We utilize principal component analysis to identify and quantify the primary electric potential morphologies during geomagnetic storms. Ordering data from Super Dual Auroral Radar Network (SuperDARN) by storm phase, we are able discern changes that occur in association with development of phases. Along information on size patterns, first six eigenvectors provide over ∼80% variability morphology...

Vision-based hand pointing interactive systems always assume implicitly that users’ physical pointing accuracy is perfect. However, this may not be the case. We investigated the accuracy provided by users in three pointing strategies. Result showed that pointing inaccuracy can be as high as 239mm at 3 metres away and suggest that the line-up method provides the best accuracy

remote sensing using small spacecraft arising from multi-objective economic activity problems is getting more and more developed. these satellites require very accurate pointing to specific locations of interest, with high reliability and small latency. the space borne imaging systems always attempted to achieve the highest ground resolution possible with the available technology at the given t...

Modern high-performance combat aircraft exceed conventional flight-envelope limits on maneuverability through the use of thrust vectoring, and so achieve supermaneuverability. With ongoing development biomimetic unmanned aerial vehicles (UAVs), potential for supermaneuverability mechanisms becomes apparent. So far, this has not been well studied: UAVs have yet shown to be capable any forms clas...

Abstract Observations of the young solar wind by Parker Solar Probe (PSP) mission reveal existence intense plasma wave bursts with frequencies between 0.05 and 0.20 f ce (tens hertz up to ∼300 Hz) in spacecraft frame. The are often collocated inhomogeneities magnetic field, such as local dips magnitude or sudden directional changes. observed waves identified electromagnetic whistler that propag...

We offer a new series of image masks for coronagraphy that are insensitive to pointing errors and other low-spatial-frequency optical aberrations. For a modest cost in throughput, these “eighth-order” band-limited masks would allow the Terrestrial Planet Finder (TPF) to operate with a pointing accuracy no better than that of the Hubble Space Telescope. We also provide eighth-order notch filter ...