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Istituto sull'inquinamento atmosferico

Torna all'elenco Contributi in rivista anno 2010

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Aerosol Optical Retrieval and Surface Reflectance from Airborne Remote Sensing Data over Land

Anno di pubblicazione: 2010

Formato: Elettronico Cartaceo

Autori: Bassani C; Cavalli R M; Pignatti S

Affiliazioni autori: Istituto sull'Inquinamento Atmosferico

Autori CNR:

  • CRISTIANA BASSANI
  • ROSA MARIA CAVALLI
  • STEFANO PIGNATTI MORANO DI CUSTOZA

Lingua: inglese

Abstract: Quantitative analysis of atmospheric optical properties and surface reflectance can be performed by applying radiative transfer theory in the Atmosphere-Earth coupled system, for the atmospheric correction of hyperspectral remote sensing data. This paper describes a new physically-based algorithm to retrieve the aerosol optical thickness at 550nm (tau(550)) and the surface reflectance (rho) from airborne acquired data in the atmospheric window of the Visible and Near-Infrared (VNIR) range. The algorithm is realized in two modules. Module A retrieves tau(550) with a minimization algorithm, then Module B retrieves the surface reflectance rho for each pixel of the image. The method was tested on five remote sensing images acquired by an airborne sensor under different geometric conditions to evaluate the reliability of the method. The results, tau(550) and rho, retrieved from each image were validated with field data contemporaneously acquired by a sun-sky radiometer and a spectroradiometer, respectively. Good correlation index, r, and low root mean square deviations, RMSD, were obtained for the tau(550) retrieved by Module A (r(2) = 0.75, RMSD = 0.08) and the rho retrieved by Module B (r(2) <= 0.9, RMSD <= 0.003). Overall, the results are encouraging, indicating that the method is reliable for optical atmospheric studies and the atmospheric correction of airborne hyperspectral images. The method does not require additional at-ground measurements about at-ground reflectance of the reference pixel and aerosol optical thickness.

Lingua abstract: inglese

Pagine da: 6421

Pagine a: 6438

Pagine totali: 18

Rivista:

Sensors Molecular Diversity Preservation International (MDPI),
Paese di pubblicazione:
Lingua: inglese
ISSN: 1424-8220

Numero volume: 10

Numero fascicolo: 7

DOI: 10.3390/s100706421

Referee: Sė: Internazionale

Indicizzato da: ISI Web of Science (WOS) [000280335700010]

Parole chiave:

  • ATMOSPHERIC CORRECTION RADIANCE MEASUREMENTS
  • MODIS DATA THICKNESS AERONET SPECTRORADIOMETER NETWORK EUROPE SUN

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