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[1] A method is presented for validation of space-based polarization measurements. The method is based on a determination of limits in the (fractional) polarization of reflected solar light as measured by the GOME instrument. These empirical limits were used to study the instrument performance during the first 5.5 years of GOME operation (1996–2001), which(More)
A method is presented for in-flight validation of space-based polarization measurements based on approximation of the direction of polarization of scattered sunlight by the Rayleigh single-scattering value. This approximation is verified by simulations of radiative transfer calculations for various atmospheric conditions. The simulations show locations(More)
The GDAQI project addresses GOME in-orbit level 1 calibration issues including air-vacuum changes (UV parabola) after launch, instrument performance degradation with time, instrument polarization sensitivity (and its changes with time), etalon spectral modulation and dichroic mirror out gassing (Fig.1). New data analysis diagnostics have been developed(More)
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