Search results for: Stefania Bonafoni

Items from 1 to 13 out of 13 results

article

Albedo Retrieval From Multispectral Landsat 8 Observation in Urban Environment: Algorithm Validation by in situ Measurements

Giorgio Baldinelli, Stefania Bonafoni, Antonella Rotili

IEEE Journal of Selected Topics in Applied Earth Observations and Remote... > 2017 > 10 > 10 > 4504 - 4511

The surface albedo in urban environment represents one of the most influencing parameters in the formation of the Urban Heat Island (UHI). Its assessment is therefore strategic to undertake actions for the UHI mitigation: the increase of urban surface reflectivity is an example of cooling strategies increasingly proposed and developed. Spaceborne observations could give a significant contribution...

article

Sustainable strategies for smart cities: Analysis of the town development effect on surface urban heat island through remote sensing methodologies

Stefania Bonafoni, Giorgio Baldinelli, Paolo Verducci

Sustainable Cities and Society > 2017 > 29 > C > 211-218

In recent years the use of satellite remote sensing techniques has proven to be a useful tool for monitoring urban surface parameters: data provided on the reflective and thermal state of the urban texture, both at local and global scale, give fundamental information on the surface urban heat island (SUHI) control of the urban planning.In this work, the retrieval of the urban albedo and land surface...

article

Downscaling of Land Surface Temperature Using Airborne High-Resolution Data: A Case Study on Aprilia, Italy

Stefania Bonafoni, Grazia Tosi

IEEE Geoscience and Remote Sensing Letters > 2017 > 14 > 1 > 107 - 111

A regression-based downscaling of land surface temperature was developed over the heterogeneous urban area of Aprilia, Central Italy, using high resolution (HR) airborne data. Airborne sensors provided thermal and visible–near infrared (VNIR) measurements at 2-m pixel size. Coarse resolution images at 40, 30, and 20 m, upscaled by aggregation from the native airborne data, were sharpened to the finer...

article

Downscaling of Landsat and MODIS Land Surface Temperature Over the Heterogeneous Urban Area of Milan

Stefania Bonafoni

IEEE Journal of Selected Topics in Applied Earth Observations and Remote... > 2016 > 9 > 5 > 2019 - 2027

Remotely sensed images of land surface temperature (LST) with high spatial resolution are required for various environmental applications. For instance, finer resolutions (FRs) are essential to capture thermal details in urban textures. To meet the requirements of sharper and sharper images, this study carries out a downscaling from coarser spatial resolution LST images to FRs using relationships...

article

The usefulness of the Global Navigation Satellite Systems (GNSS) in the analysis of precipitation events

Stefania Bonafoni, Riccardo Biondi

Atmospheric Research > 2016 > 167 > C > 15-23

It is well known that the use of the Global Navigation Satellite Systems (GNSS), both with ground-based and Low Earth Orbit (LEO) receivers, allows retrieving atmospheric parameters in all the weather conditions.Ground-based GNSS technique provides the integrated precipitable water vapour (IPWV) with temporal continuity at a specific receiver station, while the GNSS LEO technique allows for Radio...

chapter

Downscaling of the land surface temperature over urban area using Landsat data

Stefania Bonafoni, Roberta Anniballe, Nazzareno Pierdicca

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) > 1144 - 1147

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

In this work, the land surface temperature (LST) retrieval using Landsat Thematic Mapper (TM) data over the city of Florence, Italy, characterized also by the presence of rural and vegetated zones, was compared with a high-resolution (1 m ground pixel size) thermal image provided by an airborne survey made on July 18, 2010. Two Landsat scenes were processed before and after the flight, with the aim...

article

Spaceborne detection of roof and impervious surface albedo: Potentialities and comparison with airborne thermography measurements

Giorgio Baldinelli, Stefania Bonafoni, Roberta Anniballe, Andrea Presciutti, more

Solar Energy > 2015 > 113 > C > 281-294

The albedo of urban roofs and impervious surfaces constitutes one of the key parameters in the energy balance of the city environment, and its detailed and accurate assessment represents an ambitious and challenging objective.In this work, an analysis of Landsat Thematic Mapper (TM) data and airborne infrared (IR) thermography data over the city of Florence was performed to assess the satellite sensor...

article

Spatial and temporal trends of the surface and air heat island over Milan using MODIS data

Roberta Anniballe, Stefania Bonafoni, Manuele Pichierri

Remote Sensing of Environment > 2014 > 150 > Complete > 163-171

In this work the analysis of the surface and air heat island in Milan, Italy, by means of satellite maps is proposed. The urban heat island (UHI) maps were produced using data provided by the Moderate-resolution Imaging Spectroradiometer (MODIS) on board of both Terra and Aqua satellites. Two types of UHI were analyzed simultaneously: the canopy layer heat island (CLHI) and the surface urban heat...

article

Modeling and Sensing the Vertical Structure of the Atmospheric Path Delay by Microwave Radiometry to Correct SAR Interferograms

Patrizia Basili, Stefania Bonafoni, Piero Ciotti, Nazzareno Pierdicca

IEEE Transactions on Geoscience and Remote Sensing > 2014 > 52 > 2 > 1324 - 1335

The vertical structure of the atmospheric water vapor induces phase errors in interferometric synthetic aperture radar (SAR) data. This paper presents a simulation study to investigate whether spaceborne submillimeter radiometric observations, which can be realized with fairly high spatial resolution, are able to derive the vertical structure of the atmospheric wet delay. The accuracy of the retrieved...

article

Assessment of water vapor retrievals from a GPS receiver network

Stefania Bonafoni, Augusto Mazzoni, Domenico Cimini, Mario Montopoli, more

GPS Solutions > 2013 > 17 > 4 > 475-484

We present an assessment of a GPS receiver operational network to produce accurate integrated precipitable water vapour (IPWV) during a two-week field experiment carried out in Central Italy around the city of Rome, where different instruments were operative. This experimental activity provided an excellent opportunity to compare the GPS products with independent measurements provided by ground-based...

article

Satellite air temperature estimation for monitoring the canopy layer heat island of Milan

Manuele Pichierri, Stefania Bonafoni, Riccardo Biondi

Remote Sensing of Environment > 2012 > 127 > Complete > 130-138

In this work, satellite maps of the urban heat island of Milan are produced using satellite-based infrared sensor data. For this aim, we developed suitable algorithms employing satellite brightness temperatures for the direct air temperature estimation 2 m above the surface (canopy layer), showing accuracies below 2K. The air temperatures measured by ground-based weather stations were properly matched...

article

Satellite-Based Retrieval of Precipitable Water Vapor Over Land by Using a Neural Network Approach

Stefania Bonafoni, Vinia Mattioli, Patrizia Basili, Piero Ciotti, more

IEEE Transactions on Geoscience and Remote Sensing > 2011 > 49 > 9 > 3236 - 3248

A method based on neural networks is proposed to retrieve integrated precipitable water vapor (IPWV) over land from brightness temperatures measured by the Advanced Microwave Scanning Radiometer—Earth Observing System (AMSR-E). Water vapor values provided by European Centre for Medium-Range Weather Forecasts (ECMWF) were used to train the network. The performance of the network was demonstrated by...

article

Comparison of fractal dimension oscillations and trends of rainfall data from Pastaza Province, Ecuador and Veneto, Italy

Aleksandar Kalauzi, Milena Cukic, Humberto Millán, Stefania Bonafoni, more

Atmospheric Research > 2009 > 93 > 4 > 673-679

Since climate trends are getting considerable attention in recent years, we aimed in this study to compare trends and rhythms of complexity (fractal dimension, FD) of rainfall data series between two continents: Latin America and Europe. Two parallel nonlinear methods for calculating FD of a temporal data series, Higuchi's and consecutive differences, were combined with Fast Fourier Transform (FFT)...

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