Wide Field of View Microwave Interferometric Radiometer Imaging

Clicks: 202
ID: 84841
2019
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Abstract
In microwave interferometric radiometers with a large field of view, as for example the Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) onboard the Soil Moisture and Ocean Salinity (SMOS) satellite, one of the major causes of reconstruction error is the contribution to the visibility of the brightness temperature outside the fundamental period, defined on the basis of reciprocal grids. A mitigation method consisting of estimating this contribution through the application of a brightness temperature model outside the fundamental period is proposed. The main advantage is that it does not require any a posteriori addition of artificial scenes to the reconstructed image. Additionally, a method to avoid the sophisticated matrix regularization and inversion techniques usually applied in microwave interferometry is presented. Image reconstruction algorithms are implemented on a minimum grid size in order to maximize their numerical efficiency. An improved method to apply an apodization window to the reconstructed image for reducing Gibbs oscillations is also proposed. All procedures are generally described considering the single polarization case and successively implemented applying the MIRAS layout in both its single polarization and full polarimetric modes. Results show similar performance of the proposed algorithm with respect to the nominal one applied by SMOS. All algorithms are implemented in the MIRAS Testing Software and have been successfully used for scientific studies by other teams.
Reference Key
corbella2019wideremote Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Corbella, Ignasi;Torres, Francesc;Duffo, Nuria;Duran, Israel;Gonzalez-Gambau, Veronica;Martin-Neira, Manuel;
Journal remote sensing
Year 2019
DOI
DOI not found
URL
https://www.mdpi.com/2072-4292/11/6/682
Keywords
Medicine Science environmental sciences food processing and manufacture oceanography

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