Exploració per tema "Microwave remote sensing"
Ara es mostren els items 1-11 de 11
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A calibration method for fully polarimetric microwave radiometers
(IEEE Press. Institute of Electrical and Electronics Engineers, 2003-03)
Article
Accés obertA technique for absolute end-to-end calibration of a fully polarimetric microwave radiometer is presented. The technique is based on the tripolarimetric calibration technique of Gasiewski and Kunkee, but is extended to ... -
ASCAT Scatterometer wind data processing
(SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2010-03-10)
Article
Accés obert -
Characterization of a 94 GHz radiometric imager with mechanical beam-scanning
(IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper presents the characterization in terms of spatial resolution and radiometric sensitivity of a W-band Total Power Radiometer (TPR). The TPR is based on a heterodyne receiver with 64 dB of gain and 6.5 dB of noise ... -
Global unsupervised assessment of multifrequency vegetation optical depth sensitivity to vegetation cover
(Institute of Electrical and Electronics Engineers (IEEE), 2023)
Article
Accés obertVegetation optical depth (VOD) has contributed to monitor vegetation dynamics and carbon stocks at different microwave frequencies. Nevertheless, there is a need to determine which are the appropriate frequencies to monitor ... -
Observació de la terra amb sensors pasius de microones
(1994)
Article
Accés obert -
On the correlation between GNSS-R reflectivity and L-band microwave radiometry
(Institute of Electrical and Electronics Engineers (IEEE), 2016-12)
Article
Accés obertThis work compares microwave radiometry and global navigation satellite systems-reflectometry (GNSS-R) observations using data gathered from airborne flights conducted for three different soil moisture conditions. Two ... -
On the detection of RFI through the correlation anomaly at different time lags
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Text en actes de congrés
Accés obertMicrowave radiometers can be considerably affected by Radio Frequency Interference (RFI). These man-made interference conceal the underlying natural signal, preventing the retrieval of geophysical variables. Adopting ... -
On the potential of empirical mode decomposition for RFI mitigation in microwave radiometry
(Institute of Electrical and Electronics Engineers (IEEE), 2022-07-04)
Article
Accés obertRadio-frequency interference (RFI) is an increasing problem particularly for Earth observation using microwave radiometry. RFI has been observed, for example, at L-band by the European Space Agency’s (ESA’s) soil moisture ... -
Sensitivity of Aquarius active and passive measurements temporal covariability to land surface characteristics
(Institute of Electrical and Electronics Engineers (IEEE), 2015-03-16)
Article
Accés obertActive and passive microwave observations over land are affected by surface characteristics in different ways. L-band radar backscatter and radiometer measurements each have distinct advantages and problematic issues when ... -
The emissivity of foam-covered water surface at L-band: theoretical modeling and experimental results from the FROG 2003 field experiment
(IEEE Press. Institute of Electrical and Electronics Engineers, 2005-05)
Article
Accés obertSea surface salinity can be measured by microwave radiometry at L-band (1400–1427 MHz). This frequency is a compromise between sensitivity to the salinity, small atmospheric perturbation, and reasonable pixel resolution. ... -
Uncertainty analysis of soil moisture and vegetation indices using aquarius scatterometer observations
(Institute of Electrical and Electronics Engineers (IEEE), 2014-07-01)
Article
Accés restringit per política de l'editorialSimple functions of radar backscatter coefficients have been proposed as indices of soil moisture and vegetation, such as the radar vegetation index, i.e., RVI, and the soil saturation index, i.e., m(s). These indices are ...