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UV-Vis remote sensing instruments
- From L0 to L1
Alexander CedeLuftBlick, Austria
NASA/Goddard Space Flight Center, USA
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
From photons to digital number
Readout electronics (ROE)
Telescope
Fiber optics
Spectrometer
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
L0 to L1 correction steps
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Dark correction
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Effect of Dark correction
Spectrum shown in this presentation is direct sun at noon (SZA=56°) on 17 Oct 2019 at Innsbruck.
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Non linearity
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Effect of Non-linearity correction
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
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Latency
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
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Latency
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Effect of latency correction
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Pixel response non uniformity
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Conversion to count rates
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
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Temperature correction
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Stray light correction
Slit function looks tame on the linear scale, but reveals all kind of structures on the log scale → spectral stray light
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Stray light correction
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Full slit function
Video compiled and thankfully provided by● Julian Gröbner and● Natalia Kouremeti
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Effect of Stray light correction
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Spectral Sensitivity
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ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Effect of Sensitivity correction
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Wavelength correction
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●squeeze
shift
Solar reference
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
Effect of Wavelength correction
Here the wavelength shift was about 0.01nm.
ESA-EUM, 2 School and Atmospheric Composition, 19 November 2020
From photons to digital number
Readout electronics (ROE)
Telescope
Fiber optics
Spectrometer
