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The calibration of aperture synthesis radiometers (ASRs) by the standard method of noise injection would seriously increase hardware requirements and system complexity. To reduce the network of noise injection, redundant space calibration (RSC) method has been considered. However the number of error phases is larger than the number of independent equations. In this paper, an external calibration method...
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...
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...
Synthetic aperture radiometer has the potential to meet the spatial resolution requirement of passive microwave remote sensing from space. A one-dimensional prototype of aperture synthesis radiometer at millimeter wave band is introduced in this paper. It contains 16 antenna elements, 16 receiving channels, 16 ADCs, and image reconstruction part. Error correction is made in the image reconstruction...
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