Abstract
Landsat-8 OLI and PROBA-V both are put successfully in orbit during the first half 2013. Both sensors passed their commissioning period and are transferred to the operational phase, delivering new observations of the Earth’s surface.
In orbit radiometric calibration and validation of PROBA-V is done at Vito’s Remote Sensing Department, by means of the OSCAR facilities. The Landsat-8 OLI sensor is done at the South Dakota State University Image Processing Laboratory.
Both teams rely, amongst others, on acquisitions above the Libyan desert. The spectral properties of this site have been identified in various (inter) calibration exercises as temporally quite stable. Therefore, it is one of the six Pseudo-Invariant Calibration Sites (PICS) identified by CEOS. Specific properties of these sites are: high reflectance, usually made up of sand dunes with climatologically low aerosol loading and practically no vegetation. Many methods have been developed and inter-calibration exercises have been performed over this site for many different sensor.
This poster presents the comparison between both sensors by applying the models of both cal/val teams. The 4 spectral bands (3 optical and 1 short wave IR) of PROBA-V are compared against comparable Landsat-8 OLI bands.
For the Vito case, the measured TOA reflectances of both sensor are compared against simulated reflectances, using the 6S RTC model combined with a spectral BRF model of the site. For the SDSU case, near simultaneous acquisitions from PROBA-V and Landsat-8 OLI over Libya 4 PICS will be used to cross-compare the instruments. The spectral band differences will be accounted using EO-1 Hyperion sensor. Finally a comparison will be made between the results of the two cross calibration approaches.
Comparison between Landsat-8 OLI and PROBA-V over Libya-4 Pseudo Invariant Calibration Site (PICS)
Landsat-8 OLI and PROBA-V both are put successfully in orbit during the first half 2013. Both sensors passed their commissioning period and are transferred to the operational phase, delivering new observations of the Earth’s surface.
In orbit radiometric calibration and validation of PROBA-V is done at Vito’s Remote Sensing Department, by means of the OSCAR facilities. The Landsat-8 OLI sensor is done at the South Dakota State University Image Processing Laboratory.
Both teams rely, amongst others, on acquisitions above the Libyan desert. The spectral properties of this site have been identified in various (inter) calibration exercises as temporally quite stable. Therefore, it is one of the six Pseudo-Invariant Calibration Sites (PICS) identified by CEOS. Specific properties of these sites are: high reflectance, usually made up of sand dunes with climatologically low aerosol loading and practically no vegetation. Many methods have been developed and inter-calibration exercises have been performed over this site for many different sensor.
This poster presents the comparison between both sensors by applying the models of both cal/val teams. The 4 spectral bands (3 optical and 1 short wave IR) of PROBA-V are compared against comparable Landsat-8 OLI bands.
For the Vito case, the measured TOA reflectances of both sensor are compared against simulated reflectances, using the 6S RTC model combined with a spectral BRF model of the site. For the SDSU case, near simultaneous acquisitions from PROBA-V and Landsat-8 OLI over Libya 4 PICS will be used to cross-compare the instruments. The spectral band differences will be accounted using EO-1 Hyperion sensor. Finally a comparison will be made between the results of the two cross calibration approaches.