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The passive microwave observations from geostationary earth orbit (GEO) are able to enhance the short-time forecasting of tropical cyclones (TCs) due to its ability to track and detect the internal structure of TCs. To assess the operational capabilities of the candidate GEO microwave instruments, the numerical simulations of GEO microwave observation for the three TC cases were carried out. This...
The numerical simulations of imaging technology for analysis of geostationary multispectral passive microwave observation is described. This paper compares the abilities of three candidate passive microwave sensors to image the upwelling atmospheric brightness temperature. Presented are scattering-based simulations of a land falling hurricane that illustrate the imaging capabilities of a filled-aperture...
The calibration of a microwave Aperture Synthesis Radiometer (ASR) is necessary for high-quality passive microwave imaging. Existing external calibration methods have difficulties for calibration of ASRs with large arrays. In this paper, a data model of correlation matrix containing phase and amplitude errors is established. Based on the correlation matrix, a solar calibration method for ASR is proposed...
In order to deal with the inverse problem in aperture synthesis radiometers (ASRs) imaging, some deterministic inversion algorithms are proposed. However, these inversion algorithms are deficient in utilizing the statistical properties of visibility samples and reconstructed image. In this paper, the probability density functions of visibility samples and pixels of reconstructed image are investigated...
The HUST Ku-band aperture synthesis radiometer (ASR) is a 16-channel thinned array MMW imaging radiometer. Phase and amplitude calibration of MMW ASR is a crucial problem. A simple and effective calibration approach, which makes use of single external source in a known location, is proposed to tackle this problem in this paper. By the external noise source, the approach allows online estimation of...
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