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Error Propagation in Calibration Networks of Synthetic Aperture Radiometers

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6 Author(s)
Kainulainen, J. ; Dept. of Radio Sci. & Eng., Helsinki Univ. of Technol., Espoo, Finland ; Lemmetyinen, J. ; Rautiainen, K. ; Colliander, A.
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During the last two decades, the development of synthetic aperture radiometers for remote sensing has been studied intensively. One of the proposed methods for the calibration of such an instrument is the application of a distributed noise injection network. This paper focuses on the origin and effect of errors arising from this methodology. A generalized analytical method to calculate the accumulation of phase and amplitude errors in a distributed noise injection network is presented. This method is then applied to the Microwave Imaging Radiometer using Aperture Synthesis (MIRAS), the interferometric radiometer aboard the European Soil Moisture and Ocean Salinity satellite. The effect of the resulting errors to MIRAS' brightness temperature is analyzed. The presented method is applicable also to other interferometric radiometers, whose calibration relies on distributed noise injection.

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:47 ,  Issue: 9 )

Date of Publication:

Sept. 2009

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