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Your search keyword '"Ruud W. M. Hoogeveen"' showing total 2 results
Start Over Author "Ruud W. M. Hoogeveen" Journal atmospheric measurement techniques
2 results on '"Ruud W. M. Hoogeveen"'

1. Determination of the TROPOMI-SWIR instrument spectral response function

Author

R. M. van Hees, P. J. J. Tol, S. Cadot, M. Krijger, S. T. Persijn, T. A. van Kempen, R. Snel, I. Aben, and Ruud W. M. Hoogeveen

Subjects
Environmental engineering, TA170-171, Earthwork. Foundations, TA715-787
Abstract

The Tropospheric Monitoring Instrument (TROPOMI) is the single instrument on board the ESA Copernicus Sentinel-5 Precursor satellite. TROPOMI is a nadir-viewing imaging spectrometer with bands in the ultraviolet and visible, the near infrared and the shortwave infrared (SWIR). An accurate instrument spectral response function (ISRF) is required in the SWIR band where absorption lines of CO, methane and water vapor overlap. In this paper, we report on the determination of the TROPOMI-SWIR ISRF during an extensive on-ground calibration campaign. Measurements are taken with a monochromatic light source scanning the whole detector, using the spectrometer itself to determine the light intensity and wavelength. The accuracy of the resulting ISRF calibration key data is well within the requirement for trace-gas retrievals. Long-term in-flight monitoring of SWIR ISRF is achieved using five on-board diode lasers.

Published
2018
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2. In-flight calibration and monitoring of the Tropospheric Monitoring Instrument (TROPOMI) short-wave infrared (SWIR) module

Author

Paul J. J. Tol, Tim A. van Kempen, Ruud W. M. Hoogeveen, Ilse Aben, Richard van Hees, Atoms, Molecules, Lasers, and LaserLaB - Physics of Light

Subjects
Atmospheric Science, Offset (computer science), 010504 meteorology & atmospheric sciences, Pixel, lcsh:TA715-787, Noise (signal processing), lcsh:Earthwork. Foundations, 01 natural sciences, lcsh:Environmental engineering, Troposphere, Calibration, Environmental science, Sensitivity (control systems), lcsh:TA170-171, 0105 earth and related environmental sciences, Dark current, Eclipse, Remote sensing
Abstract

During its first year in operation the short-wave infrared (SWIR) Tropospheric Monitoring Instrument (TROPOMI) was calibrated in-flight and its performance was monitored. In this paper we present the results of the in-flight calibration and the ongoing instrument monitoring. This includes the determination of the background signals, noise performance, instrument spectral response function (ISRF) stability, and stray-light stability. From these results, the number of incurred dead and bad pixels due to cosmic-ray impacts is determined. The light-path transmission is checked by monitoring internal lamp and diffuser stabilities. Due to its high sensitivity to Earth radiation on the eclipse side, the calibration strategy for the background (i.e. dark current and offset) monitoring was adjusted. Trends over the first full year of nominal operations reveal a very stable SWIR module. The number of newly incurred dead and bad pixels is less than 0.1 % over nearly a full year since the start of operations. Assuming linear degradation of various components, the SWIR module is expected to keep performing within expected parameters for the full operational lifetime.

Published
2019
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