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

Tim A. Van Kempen; Richard M. Van Hees; Paul J.J. Tol; Ilse Aben; Ruud W.M. Hoogeveen

doi:10.5194/amt-12-6827-2019

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

Tim A. Van Kempen^*, Richard M. Van Hees, Paul J.J. Tol, Ilse Aben, Ruud W.M. Hoogeveen

^*Corresponding author for this work

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

During its first year in operation the shortwave 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.

Original language	English
Pages (from-to)	6827-6844
Number of pages	18
Journal	Atmospheric Measurement Techniques
Volume	12
Issue number	12
DOIs	https://doi.org/10.5194/amt-12-6827-2019
Publication status	Published - 20 Dec 2019

Funding

2TROPOMI is a collaboration between Airbus Defence and Space Netherlands, KNMI (Koninklijk Nederlands Meteorologisch Instituut), SRON (Netherlands Institute for Space Research), and TNO (Nederlandse Organisatie voor Toegepast Natuurwetenschap-pelijk Onderzoek), on behalf of NSO (Netherlands Space Office) and ESA (European Space Agency). Airbus Defence and Space Netherlands is the main contractor for the design, building, and testing of the instrument. KNMI and SRON are the principal investigator institutes for the instrument. TROPOMI is funded by the following ministries of the Dutch government: the Ministry of Economic Affairs; the Ministry of Education, Culture and Science; and the Ministry of Infrastructure and the Environment. Financial support. This research is funded by the TROPOMI national programme from the Netherlands Space Office (NSO).

Funders	Funder number
Netherlands Space Office
Ministerie van Economische Zaken
Ministerie van Onderwijs, Cultuur en Wetenschap
Ministerie van Infrastructuur en Milieu

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title = "In-flight calibration and monitoring of the Tropospheric Monitoring Instrument (TROPOMI) short-wave infrared (SWIR) module",

abstract = "During its first year in operation the shortwave 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.",

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AU - Van Hees, Richard M.

AU - Tol, Paul J.J.

AU - Aben, Ilse

AU - Hoogeveen, Ruud W.M.

PY - 2019/12/20

Y1 - 2019/12/20

N2 - During its first year in operation the shortwave 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.

AB - During its first year in operation the shortwave 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.

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

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