Cristina P. Tanzi

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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)
Degradation of optical components in space is a problem affecting many remote sensing instruments. In the Global Ozone Monitoring Experiment (GOME) on board ERS-2, the light backscattered by the Earth’s atmosphere follows a different optical path through the spectrometer than solar irradiance. GOME has been therefore designed to monitor degradation of(More)
Albert P H Goede , Cristina P Tanzi , Miranda van den Broek , Folkard Wittrock , John P Burrows , Klaus Bramstedt , Mark Weber , Kai-Uwe Eichmann , Andreas Richter , Dieter Perner , Paul S Monks , Gary K Corlett , Bill Arlander , Georg H Hansen , Kjersti K Toernkvist , Britt Ann K. Hoiskar , Ulrich Platt , Thomas Wagner , Klaus Pfeilsticker , Petteri Taalas(More)
Comparison of the solar irradiance spectra measured by GOME through the lifetime of the sensor with early GOME solar irradiance spectra or other space instruments, showed that the pre-flight radiance parameters were no longer applicable to the GOME in-flight situation. In all wavelength regions there is degradation caused by hard UV light and cosmic(More)
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