Characterization results of the TROPOMI Short Wave InfraRed detector

Hoogeveen, Ruud W. M.; Voors, Robert; Robbins, Mark S.; Tol, Paul; Ivanov, T. I.

doi:10.1117/12.2028759

Cited by 13 publications

(24 citation statements)

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“…The skewnormal width parameter is sensitive to the photosensitivity of the SWIR detector (Fig. 6 of Hoogeveen et al, 2013). These patterns are easily recognizable in the residual plot (Fig.…”

Section: Discussion Of Resultsmentioning

confidence: 88%

“…A nonlinearity correction is not implemented in the operational processor. It is also not needed for the ISRF characterization, as the error is small: detector nonlinearity was measured to be about 0.1 to 0.2 % (Hoogeveen et al, 2013). In irradiance measurements, where the light is imaged as a vertical line, the ISRF at one row could be affected by stray light from other rows.…”

Section: Data Preparationmentioning

confidence: 99%

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Determination of the TROPOMI-SWIR instrument spectral response function

et al. 2018

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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.

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Section: Discussion Of Resultsmentioning

confidence: 88%

Section: Data Preparationmentioning

confidence: 99%

Determination of the TROPOMI-SWIR instrument spectral response function

et al. 2018

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“…All other detector calibration results of the CMOS SWIR detector are reported in Hoogeveen et al (2013).…”

Section: Detector Calibrationmentioning

confidence: 99%

“…Here we treat the UVN electronic calibration, the SWIR calibration is described in Hoogeveen et al (2013). Table 6 gives a summary of the 15 UVN calibrated electronic and detector properties which are part of the CKD in the L01b data processor.…”

Section: Electronic Calibrationmentioning

confidence: 99%

Pre-launch calibration results of the TROPOMI payload on-board the Sentinel 5 Precursor satellite

Kleipool¹,

Ludewig²,

Babić³

et al. 2018

Preprint

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Abstract. The Sentinel 5 precursor satellite was successfully launched on 13th October 2017, carrying the Tropospheric Monitoring Instrument TROPOMI as its single payload. TROPOMI is the next generation atmospheric sounding instrument, continuing the successes of GOME, SCIAMACHY, OMI and OMPs, with higher spatial resolution, improved sensitivity and extended wavelength range. The instrument contains four spectrometers, divided over two modules sharing a common telescope, measuring the ultraviolet, visible, near-infrared and shortwave infrared reflectance of the Earth. The imaging system 5 enables daily global coverage using a push-broom configuration, with a spatial resolution as low as 7 x 3.5 km2 in nadir from a Sun-synchronous orbit at 824 km and an equator crossing time of 13:30 local solar time.This article reports the pre-launch calibration status of the TROPOMI payload as derived from the on-ground calibration effort. Stringent requirements are imposed on the quality of on-ground calibration in order to match the high sensitivity of the instrument. In case that the systematic errors that originate from the calibration exceed the random errors in the observations, 10 the scientific products may be compromised. A new methodology has been employed during the analysis of the obtained calibration measurements to ensure the consistency and validity of the calibration. This was achieved by using the production grade Level 0 to 1b data processor in a closed-loop validation setup. Using this approach the consistency between the calibration and the L1b product could be established, as well as confidence in the obtained calibration result.This article introduces this novel calibration approach, and describes all relevant calibrated instrument properties as they 15 were derived before launch of the mission. For most of the relevant properties compliance with the requirements could be established, including the knowledge of the instrument spectral and spatial response functions, and the absolute radiometric calibration. Partial compliance was established for the straylight correction; especially the out-of-spectral-band correction for the NIR channel needs further validation. Incompliance was reported for the relative radiometric calibration of the Sun port diffusers. These latter two subjects will be addressed during the in-flight commissioning phase in the first 6 months following

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“…The pattern is probably due to variations in the sensitive area of the detector as the pattern is also seen in sensitivity plots of the detector alone (Hoogeveen et al, 2013). The fine-scale structures are smoothed in the parameter fit.…”

mentioning

confidence: 99%

New method to determine the instrument spectral response function, applied to TROPOMI-SWIR

Hees¹,

Tol²,

Cadot³

et al. 2017

Preprint

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Abstract. The Tropospheric Monitoring Instrument (TROPOMI) is the single instrument on board of the ESA CopernicusSentinel-5 Precursor satellite. TROPOMI is a nadir-viewing imaging spectrometer with bands in the ultraviolet and visible, the near infrared and the short-wave 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. Therefore a novel method for ISRF determination for an imaging spectrometer was developed and applied to the TROPOMI-SWIR band. The ISRF of all detector pixels of 5 the SWIR spectrometer has been measured during an on-ground calibration campaign. The accuracy of the derived ISRF is well within the requirement for accurate trace-gas retrievals. Long-term in-flight monitoring of the ISRF is guaranteed by the presence of five SWIR diode lasers.

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Characterization results of the TROPOMI Short Wave InfraRed detector

Cited by 13 publications

References 0 publications

Determination of the TROPOMI-SWIR instrument spectral response function

Determination of the TROPOMI-SWIR instrument spectral response function

Pre-launch calibration results of the TROPOMI payload on-board the Sentinel 5 Precursor satellite

New method to determine the instrument spectral response function, applied to TROPOMI-SWIR

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