2006 First European Conference on Antennas and Propagation, 2006
The Salonen cloud model currently in use in propagation and remote sensing simulations is analyze... more The Salonen cloud model currently in use in propagation and remote sensing simulations is analyzed at two independent sites: the ARM SGP site in USA, and the FUB site in Pomezia, Italy. The humidity threshold function is evaluated by using a ceilometer located at SGP and an otimization of such threshold is proposed. The cloud water model is assessed by comparing simulated brightness temperatures (TBs) with those measured by a dual-channel radiometer at 23.8 and 31.4 GHz. At SGP, the Salonen model is also tuned to the radiometer TBs. Then, the Salonen model, its modifications, and a model developed based on the outputs of numerical simulations are all evaluated at the site of Pomezia, in Italy, by comparing simulated TBs with measurements from a dual-channel radiometer at 23.8 and 31.65 Ghz.
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
Numerous space-borne X-band Synthetic Aperture Radars (X-SAR) systems will be launched by Europea... more Numerous space-borne X-band Synthetic Aperture Radars (X-SAR) systems will be launched by European agencies in the coming decade commencing this year. Those X-SARs can measure precipitation over land, thereby significantly augmenting the sensors that comprise the Global Precipitation Mission (GPM). This will incur relatively little incremental cost because they have already been funded. X-SAR measurements are especially beneficial over land
The goal of this study is to detect and map the land use and land cover changes of the rocky flat... more The goal of this study is to detect and map the land use and land cover changes of the rocky flats nuclear facility between 2002 and 2005, using high resolution QuickBird satellite images provided by DigitalGlobe. The dataset consists of four multi-spectral QuickBird images, one image per year, with a spatial resolution of 2.4 meters. The evolution of the changes
IEEE International Geoscience and Remote Sensing Symposium, 2002
Estimates bare soil geophysical parameters (i.e. standard deviation of roughness height s, length... more Estimates bare soil geophysical parameters (i.e. standard deviation of roughness height s, length of correlation l and soil moisture mv) using polarimetric SAR data. Two direct models have been implemented to simulate the radar measurements and were introduced in an inversion scheme. The methods have been tested on simulated data where speckle effects and model errors were taken into account. A correlation between the roughness parameters, as it can be expected in real measures, has been imposed in the simulation in order to evaluate its effect on the estimation accuracy. Different inversion algorithms based on a Bayesian approach, developed with simple optimization-integration procedures have been compared to neural networks. The comparison has assessed the accuracy achievable by different radar system configurations. Polarimetric data acquired during MAC Europe and SIR-C campaigns, over selected bare soil fields, has been processed to show preliminary estimation results.
IEEE Transactions on Geoscience and Remote Sensing, 1996
Applications of space-based microwave radiometry to precipitation retrieval is addressed, focusin... more Applications of space-based microwave radiometry to precipitation retrieval is addressed, focusing on model-based inversion techniques and optimal combination with other satellite sensors. Statistical integration of microwave radiometers with space-borne radars and thermal infrared radiometers is sketched. Examples of measurements and products are shown to emphasize the physical background of combined techniques. The concept of the newly approved NASA/NASDA Global Precipitation
IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 1997
This paper considers the relevance of a priori information in the retrieval of atmospheric temper... more This paper considers the relevance of a priori information in the retrieval of atmospheric temperature profiles in terms of time and space evolution models. Different retrieval algorithms (ordinary and ridge linear regressions, Kalman filtering and neural networks) are compared, when applied to both synthetic and real SSM/I measurements
2006 First European Conference on Antennas and Propagation, 2006
The Salonen cloud model currently in use in propagation and remote sensing simulations is analyze... more The Salonen cloud model currently in use in propagation and remote sensing simulations is analyzed at two independent sites: the ARM SGP site in USA, and the FUB site in Pomezia, Italy. The humidity threshold function is evaluated by using a ceilometer located at SGP and an otimization of such threshold is proposed. The cloud water model is assessed by comparing simulated brightness temperatures (TBs) with those measured by a dual-channel radiometer at 23.8 and 31.4 GHz. At SGP, the Salonen model is also tuned to the radiometer TBs. Then, the Salonen model, its modifications, and a model developed based on the outputs of numerical simulations are all evaluated at the site of Pomezia, in Italy, by comparing simulated TBs with measurements from a dual-channel radiometer at 23.8 and 31.65 Ghz.
2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
Numerous space-borne X-band Synthetic Aperture Radars (X-SAR) systems will be launched by Europea... more Numerous space-borne X-band Synthetic Aperture Radars (X-SAR) systems will be launched by European agencies in the coming decade commencing this year. Those X-SARs can measure precipitation over land, thereby significantly augmenting the sensors that comprise the Global Precipitation Mission (GPM). This will incur relatively little incremental cost because they have already been funded. X-SAR measurements are especially beneficial over land
The goal of this study is to detect and map the land use and land cover changes of the rocky flat... more The goal of this study is to detect and map the land use and land cover changes of the rocky flats nuclear facility between 2002 and 2005, using high resolution QuickBird satellite images provided by DigitalGlobe. The dataset consists of four multi-spectral QuickBird images, one image per year, with a spatial resolution of 2.4 meters. The evolution of the changes
IEEE International Geoscience and Remote Sensing Symposium, 2002
Estimates bare soil geophysical parameters (i.e. standard deviation of roughness height s, length... more Estimates bare soil geophysical parameters (i.e. standard deviation of roughness height s, length of correlation l and soil moisture mv) using polarimetric SAR data. Two direct models have been implemented to simulate the radar measurements and were introduced in an inversion scheme. The methods have been tested on simulated data where speckle effects and model errors were taken into account. A correlation between the roughness parameters, as it can be expected in real measures, has been imposed in the simulation in order to evaluate its effect on the estimation accuracy. Different inversion algorithms based on a Bayesian approach, developed with simple optimization-integration procedures have been compared to neural networks. The comparison has assessed the accuracy achievable by different radar system configurations. Polarimetric data acquired during MAC Europe and SIR-C campaigns, over selected bare soil fields, has been processed to show preliminary estimation results.
IEEE Transactions on Geoscience and Remote Sensing, 1996
Applications of space-based microwave radiometry to precipitation retrieval is addressed, focusin... more Applications of space-based microwave radiometry to precipitation retrieval is addressed, focusing on model-based inversion techniques and optimal combination with other satellite sensors. Statistical integration of microwave radiometers with space-borne radars and thermal infrared radiometers is sketched. Examples of measurements and products are shown to emphasize the physical background of combined techniques. The concept of the newly approved NASA/NASDA Global Precipitation
IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 1997
This paper considers the relevance of a priori information in the retrieval of atmospheric temper... more This paper considers the relevance of a priori information in the retrieval of atmospheric temperature profiles in terms of time and space evolution models. Different retrieval algorithms (ordinary and ridge linear regressions, Kalman filtering and neural networks) are compared, when applied to both synthetic and real SSM/I measurements
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