Vegetation calibration of blue and red channels using Rayleigh scattering over open oceans

Xavier Briottet; Eric Dilligeard; Richard P. Santer; Jean Luc Deuze

doi:10.1117/12.298098

31 December 1997 Vegetation calibration of blue and red channels using Rayleigh scattering over open oceans

Xavier Briottet, Eric Dilligeard, Richard P. Santer, Jean Luc Deuze

Proceedings Volume 3221, Sensors, Systems, and Next-Generation Satellites; (1997) https://doi.org/10.1117/12.298098
Event: Aerospace Remote Sensing '97, 1997, London, United Kingdom

Abstract

Rayleigh scattering targets over clear oceans under large solar and viewing angles have proved their efficiency to calibrate remote sensing instruments in the low wavelength channels (AVHRR C1, SPOT-HRV XS1). To obtain a good accuracy, this method needs an evaluation of the different contributors participating in the total TOA signal: aerosol, atmospheric conditions, foam, water reflectance. For instruments such as SPOT or VEGETATION, the near infra red band is used to estimate the aerosol content which is after transferred in the band to be calibrated depending on the considered aerosol type. Two methods are described for the spectral transfer of the aerosol optical depth: one using the interband calibration coefficient and a new one using the absolute calibration coefficient of the near infra red band. Simulations are done to evaluate the performances of these two methods using different extreme cases of solar and viewing zenith angles, wind speed, water vapor content and ozone amount. The results show the method using the absolute calibration coefficient is more accurate.

Citation Download Citation

Xavier Briottet, Eric Dilligeard, Richard P. Santer, and Jean Luc Deuze "Vegetation calibration of blue and red channels using Rayleigh scattering over open oceans", Proc. SPIE 3221, Sensors, Systems, and Next-Generation Satellites, (31 December 1997); https://doi.org/10.1117/12.298098

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