This paper proposes a new approach for high-resolution airborne SAR data processing, which uses a modified chirp scaling algorithm to accommodate the correction of motion errors, as well as the variations of the Doppler centroid in range and azimuth. By introducing a cubic phase term in the chirp scaling phase, data acquired with a squint angle up to 30" can be processed with no degradation of ...

Introduction / objectives Hospital acquired infections (HAIs) claim on average 90,000 lives each year in the U.S., nearly three times the number of annual highway deaths. Although fewer than 15% of HAIs are directly attributable to airborne transmission, more than a third may be caused by surface microbes aerosolized by the movement of air from building systems, people and equipment. As a resul...

Abstract El-Bakriya area is situated in the Central Eastern Desert of Egypt. It includes several mineral occurrences and/or deposits. Data from remote sensing and airborne geophysics (gamma-ray magnetic) were combined to identify hydrothermal alteration zones structures related these occurrences. Various processing ASTER satellite images revealed fifteen high probability for metallic mineraliza...

Introduction: Phase images generated using gradient echo techniques at high field strength show excellent contrast related to the variation of magnetic susceptibility across different brain tissues [1] (Fig. 1a&d). Extraction of accurate anatomical information from phase images is however made difficult by the non-local relationship between the field perturbation, which underlies the phase vari...

platanus acerifolia, london plane tree, a significant source of airborne allergens, is widely grown in shanghai and other cities in china. in recent decades, little has been known regarding the influence of the allergens on sensitizing the population in the shanghai area. the aims of this study were to purify and characterize the two major allergens and to confirm the immunological activities o...

In Finland, peatland forests are significant for wood supply, although simultaneously, they also important biodiversity, carbon sequestration, water conservation, and recreation. the 1960s 1970s, in Finland were extensively drained to increase tree growth fulfil needs of forest sector. However, this extensive drainage has negatively impacted on biodiversity ecosystems, substantially increased n...

this paper describes an efficient edge-preserved regularization algorithm for downward continuation of magnetic data in detection of unexploded ordnance (uxo). the magnetic anomalies arising from multi-source uxo can overlap at a height over the ground surface, while causative sources may not be readily separated due to low level of signal-to-noise ratio of the observed data. to effectively the...