Recent advances in Earth remote sensing: Fourier Transform Stationary HyperSpectral Imagers

Future trends for the development of new remote sensing imagers have being defined since the launch of the first Fourier Transform HyperSpectral Imager (FTHSI) on board of DoD technological satellite MightySat II.1. Starting from the analysis of FTHSI optical configuration we have proposed an interesting modification which produces an image of the observed surface superimposed to a stationary interference pattern. This new optical arrangement together with the possibility to accommodate the spectral resolution by changing the device optical aperture and the sensor sampling step make the new instrument interesting for Earth remote sensing purposes. In this paper we present some preliminary results obtained from a laboratory prototype developed at our Institute. Some hints are discussed about the use of such an instrument on board of airborne and satellite platforms

Hyperspectral remote sensing for light pollution monitoring

industries. In this paper we introduce the results from a remote sensing campaign performed in September 2001 at night time. For the first time nocturnal light pollution was measured at high spatial and spectral resolution using two airborne hyperspectral sensors, namely the Multispectral Infrared and Visible Imaging Spectrometer (MIVIS) and the Visible InfraRed Scanner (VIRS-200). These imagers, generally employed for day-time Earth remote sensing, were flown over the Tuscany coast (Italy) on board of a Casa 212/200 airplane from an altitude of 1.5-2.0 km. We describe the experimental activities which preceded the remote sensing campaign, the optimization of sensor configuration, and the images as far acquired. The obtained results point out the novelty of the performed measurements and highlight the need to employ advanced remote sensing techniques as a spectroscopic tool for light pollution monitoring

Laparoscopia nas hérnias diafragmáticas: estudo experimental em cães

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Recent advances in Earth remote sensing: Fourier Transform Stationary HyperSpectral Imagers

Future trends for the development of new remote sensing imagers have being defined since the launch of the first Fourier Transform HyperSpectral Imager (FTHSI) on board of DoD technological satellite MightySat II.1. Starting from the analysis of FTHSI optical configuration we have proposed an interesting modification which produces an image of the observed surface superimposed to a stationary interference pattern. This new optical arrangement together with the possibility to accommodate the spectral resolution by changing the device optical aperture and the sensor sampling step make the new instrument interesting for Earth remote sensing purposes. In this paper we present some preliminary results obtained from a laboratory prototype developed at our Institute. Some hints are discussed about the use of such an instrument on board of airborne and satellite platforms

Telerilevamento della concentrazione di azoto fogliare in ecosistemi forestali litoranei

Lo studio qui presentato ha lo scopo di testare nuove metodologie per il rilevamento della concentrazione di azoto fogliare (N) a livello di copertura. In particolare sono state messe a confronto due tecniche differenti basate sul remote sensing: la prima basata sulle lunghezze d’onda dello SWIR (Short Wave Infra-Red) e la seconda sul NIR (Near Infra-Red). La possibilità di stimare la concentrazione fogliare di N dalla riflettanza nel NIR è stata dimostrata da recenti studi su foreste temperate e boreali (Ollinger et al., 2008; Hollinger et al., 2009) utilizzando immagini MODIS (Moderate Resolution Imaging Spectroradiometer), poco idonee all’alta variabilità spaziale del territorio italiano. Per ottenere dati SWIR è stato utilizzato un volo aereo MIVIS (Multispectral Infrared and Visible Imaging Spectrometer) effettuato nel giugno 2000 sull’area di studio del Parco Naturale di San Rossore, Pisa (Italia); mentre, per il NIR, si sono utilizzate immagini Landsat 7 ETM+ (Enhanced Thematic Mapper Plus) riprese nello stesso periodo ed interessanti la stessa zona. La riflettanza di copertura stimata da immagini telerilevate è stata poi messa in relazione a rilievi a terra eseguiti sempre nel giugno 2000