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Impact of the local oscillator calibration rate on the SMOS measurements and retrieved salinities

Author
Gabarro, C.; González, V.; Corbella, I.; Torres, F.
Type of activity
Journal article
Journal
IEEE transactions on geoscience and remote sensing
Date of publication
2013-09-02
Volume
51
Number
9
First page
4633
Last page
4642
DOI
https://doi.org/10.1109/TGRS.2012.2233744 Open in new window
Repository
http://hdl.handle.net/2117/86692 Open in new window
Abstract
The local oscillators (LOs) of the Soil Moisture and Ocean Salinity mission payload are used to shift the operating frequency of the 72 receivers to an optimal intermediate frequency needed for the signal processing. The LO temperature variations produce phase errors in the visibility, which result in a blurring of the reconstructed brightness temperature (Tb) image. At the end of the commissioning phase, it was decided to calibrate the LO every 10 min while waiting for a more in-depth analysis....
Citation
Gabarro, C., Gonzalez, V., Corbella, I., Torres, F. Impact of the local oscillator calibration rate on the SMOS measurements and retrieved salinities. "IEEE transactions on geoscience and remote sensing", 02 Setembre 2013, vol. 51, núm. 9, p. 4633-4642.
Keywords
Brightness temperature, Calibration, Interferometry, Microwave Imaging Radiometer by Aperture Synthesis (MIRAS), Radiometer, Salinity, Soil Moisture and Ocean Salinity (SMOS)
Group of research
RF&MW - Laboratory of RF & microwave systems, devices and materials
RSLAB - Remote Sensing Lab

Participants