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

Autor
Gabarro, C.; González, V.; Corbella, I.; Torres, F.
Tipus d'activitat
Article en revista
Revista
IEEE transactions on geoscience and remote sensing
Data de publicació
2013-09-02
Volum
51
Número
9
Pàgina inicial
4633
Pàgina final
4642
DOI
https://doi.org/10.1109/TGRS.2012.2233744 Obrir en finestra nova
Repositori
http://hdl.handle.net/2117/86692 Obrir en finestra nova
Resum
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....
Citació
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.
Paraules clau
Brightness temperature, Calibration, Interferometry, Microwave Imaging Radiometer by Aperture Synthesis (MIRAS), Radiometer, Salinity, Soil Moisture and Ocean Salinity (SMOS)
Grup de recerca
RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones
RSLAB - Grup de Recerca en Teledetecció

Participants