Dr. Nick C. J. van der Valk Profile

Dr. Nick C. J. van der Valk

at TNO

SPIE Involvement:

Author

Publications (13)

Proceedings Article | 12 July 2023 Open Access

Compact static interferometer instrument studies for greenhouse gas detection

Flavio Mariani, Denis Simeoni, Nurcan Alpay Koc, Vitalii Khodnevych, Nicolas Tetaz, Bruno Chetrite, Mikael Carlavan, Stephane Ferron, Jean-Luc Vergely, Nick van der Valk, Hedser van Brug, Benjamin Brenny, Huib Visser, Jochen Landgraf, Stephanie Rusli, Roman Windpassinger, Bernd Sierk

Proceedings Volume 12777, 127771V (2023) https://doi.org/10.1117/12.2689941

KEYWORDS: Equipment, Carbon monoxide, Optical path differences, Interferometers, Near infrared, Short wave infrared radiation, Aerosols, Atmospheric modeling, Astronomical imaging, Spatial resolution

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Proceedings Article | 11 June 2021 Open Access

CarbonHIGS

Hedser van Brug, Huib Visser, Benjamin Brenny, Nick van der Valk, Bernd Sierk, Arnaud Heliere, Stephanie Rusli, Jochen Landgraf

Proceedings Volume 11852, 118520D (2021) https://doi.org/10.1117/12.2599154

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Proceedings Article | 10 October 2019 Paper

Manufacturing method for monolithic freeform Offner-gratings for hyper-spectral imaging

M. Burkhardt, T. Rathje, D. Lehr, L. Erdmann, M. Helgert, P. Triebel, T. Diehl, A. Gatto, N v.d Valk, R. Vink, R. Jansen, J. Day, W. Gielesen

Proceedings Volume 11151, 111510U (2019) https://doi.org/10.1117/12.2532101

KEYWORDS: Manufacturing, Diffraction gratings, Hyperspectral systems, Optics manufacturing, Optical design, Diffraction, Spectroscopy, Polarization, Inspection, Holography

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Proceedings Article | 12 July 2019 Open Access

Optical satellite communication space terminal technology at TNO

Rudolf Saathof, Will Crowcombe, Stefan Kuiper, Nick van der Valk, Federico Pettazzi, Dorus de Lange, Peter Kerkhof, Martijn van Riel, Harry de Man, Niel Truyens, Ivan Ferrario

Proceedings Volume 11180, 111800K (2019) https://doi.org/10.1117/12.2535939

KEYWORDS: Satellite communications, Satellites, Optical communications, Telescopes, Head, Optical benches, Aerospace engineering, Mirrors, Radio optics, Sensors

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Proceedings Article | 25 March 2019 Paper

Opto-mechatronics system development for future intersatellite laser communications

Rudolf Saathof, Stefan Kuiper, Will Crowcombe, Harry de Man, Dorus de Lange, Nick van der Valk, Lukas Kramer, Erik Fritz

Proceedings Volume 10910, 109101B (2019) https://doi.org/10.1117/12.2508870

KEYWORDS: Satellite communications, Satellites, Head, Telecommunications, Laser communications, Optical communications, Optical coherence tomography, Computer aided design, Data communications, Telescopes

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Proceedings Article | 25 September 2018 Paper

Compact hyperspectral instrument for NO2 remote sensing

Andrew Court, Jean Loup Bezy, Pieternel Levelt, Martin Siegl, Anton Leemhuis, Nick vd Valk, Pepijn Veefkind

Proceedings Volume 10785, 107850F (2018) https://doi.org/10.1117/12.2325152

KEYWORDS: Nitrogen dioxide, Spectroscopy, Calibration, Spatial resolution, Mirrors, Sensors, Telescopes, Hyperspectral imaging, Remote sensing, Manufacturing

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Proceedings Article | 20 November 2017 Open Access

TROPOMI, the Sentinel 5 precursor instrument for air quality and climate observations: status of the current design

Robert Voors, Johan de Vries, Ianjit Bhatti, Dan Lobb, Trevor Wood, Nick van der Valk, Ilse Aben, Pepijn Veefkind

Proceedings Volume 10564, 105641Q (2017) https://doi.org/10.1117/12.2309017

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TROPOMI, the Tropospheric Monitoring Instrument, is a passive UV-VIS-NIR-SWIR trace gas spectrograph in the line of SCIAMACHY (2002) and OMI (2004), instruments with the Netherlands in a leading role. Both instruments are very successful and remained operational long after their nominal life time.

TROPOMI is the next step, scheduled for launch in 2015. It combines the broad wavelength range from SCIAMACHY from UV to SWIR and the broad viewing angle push-broom concept from OMI, which makes daily global coverage in combination with good spatial resolution possible. Using spectral bands from 270-500nm (UV-VIS) 675-775nm (NIR) and 2305-2385nm (SWIR) at moderate resolution (0.25 to 0.6nm) TROPOMI will measure O3, NO2, SO2, BrO, HCHO and H2O tropospheric columns from the UV-VIS-NIR wavelength range and CO and CH4 tropospheric columns from the SWIR wavelength range. Cloud information will be derived primarily from the O2A band in the NIR. This will help, together with the aerosol information, in constraining the light path of backscattered solar radiation. Methane (CH4), CO2 and Carbon monoxide (CO) are the key gases of the global carbon cycle. Of these, Methane is by far the least understood in terms of its sources and is most difficult to predict its future trend. Global space observations are needed to inform atmospheric models. The SWIR channel of TROPOMI is designed to achieve the spectral, spatial and SNR resolution required for this task.

TROPOMI will yield an improved accuracy of the tropospheric products compared to the instruments currently in orbit. TROPOMI will take a major step forward in spatial resolution and sensitivity. The nominal observations are at 7 x 7 km2 at nadir and the signal-to-noises are sufficient for trace gas retrieval even at very low albedos (down to 2%). This spatial resolution allows observation of air quality at sub-city level and the high signal-to-noises means that the instrument can perform useful measurements in the darkest conditions.

TROPOMI is currently in its detailed design phase. This paper gives an overview of the challenges and current performances. From unit level engineering models first results are becoming available. Early results are promising and this paper discusses some of these early H/W results.

TROPOMI is the single payload on the Sentinel-5 precursor mission which is a joint initiative of the European Community (EC) and of the European Space Agency (ESA). The 2015 launch intends to bridge the data stream from OMI / SCIAMACHY and the upcoming Sentinel 5 mission. The instrument is funded jointly by the Netherlands Space Office and by ESA. Dutch Space is the instrument prime contractor. SSTL in the UK is developing the SWIR module with a significant contribution from SRON. Dutch Space and TNO are working as an integrated team for the UVN module. KNMI and SRON are responsible for ensuring the scientific capabilities of the instrument.

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Proceedings Article | 17 November 2017 Open Access

The Tropomi instrument: last steps towards final integration and testing

J. Doornink, J. de Vries, R. Voors, J. Dingjan, B. Ording, N. van der Valk, R. Vink, R. Hoogeveen, J. Grant, T. Canas, Q. Kleipool, P. Veefkind

Proceedings Volume 10563, 1056342 (2017) https://doi.org/10.1117/12.2304148

KEYWORDS: Sensors, Short wave infrared radiation, Spectroscopy, Space telescopes, Telescopes, Astronomical imaging, Calibration, Electronics, Near infrared, Space operations

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Proceedings Article | 17 November 2017 Open Access

Design and characterization of the blazed holographic UV gratings for Tropomi

A. Cotel, A. Liard, F. Desserouer, P. Pichon, N. van der Valk

Proceedings Volume 10563, 105634S (2017) https://doi.org/10.1117/12.2304066

KEYWORDS: Diffraction gratings, Stray light, Ultraviolet radiation, Holography, Optical design, Diffraction, Polarization, Astronomical imaging, Optical testing, Sensors

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Proceedings Article | 17 November 2017 Open Access

Optical coatings for the Tropomi UV channel

Martijn Brouwer, Robin van Buuren, Niels Gawlitta, Semen Grabarnik, Nick van der Valk, Rob Vink, Hedser van Brug, Huib Visser

Proceedings Volume 10563, 105634R (2017) https://doi.org/10.1117/12.2304065

KEYWORDS: Ultraviolet radiation, Mirrors, Stray light, Optical coatings, Reflection, Transmitters, Astronomical imaging, Surface roughness, Light scattering, Scattering

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Proceedings Article | 16 October 2013 Paper

The TROPOMI instrument: first H/W results

Robert Voors, Johan de Vries, Nick van der Valk, Ianjit Bhatti, David Woods, Ilse Aben, Ruud Hoogeveen, Pepijn Veefkind, Quintus Kleipool

Proceedings Volume 8889, 88890Q (2013) https://doi.org/10.1117/12.2028848

KEYWORDS: Short wave infrared radiation, Sensors, Electronics, Telescopes, Optical benches, Spectroscopy, Space telescopes, Space operations, Calibration, Spectrographs

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Proceedings Article | 3 October 2011 Paper

PDR status for TROPOMI, the Sentinel 5 precursor instrument for air quality and climate observations

Johan de Vries, Robert Voors, Gerard Otter, Nick van der Valk, Ilse Aben, Ruud Hoogeveen, Ralph Snel, Quintus Kleipool, Pepijn Veefkind

Proceedings Volume 8176, 817609 (2011) https://doi.org/10.1117/12.898027

KEYWORDS: Sensors, Short wave infrared radiation, Satellites, Near infrared, Spectrographs, Spatial resolution, Environmental sensing, Sun, Telescopes, Climatology

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Proceedings Article | 23 September 2009 Paper

TROPOMI, the solar backscatter satellite instrument for air quality and climate, heads towards detailed design

Johan de Vries, Robert Voors, A'gnes Mika, Gerard Otter, Nick van der Valk, Ilse Aben, Ruud Hoogeveen, Annemieke Gloudemans, Marcel Dobber, Pepijn Veefkind, Pieternel Levelt

Proceedings Volume 7474, 747409 (2009) https://doi.org/10.1117/12.830087

KEYWORDS: Sensors, Short wave infrared radiation, Polarization, Satellites, CMOS sensors, Charge-coupled devices, Spectrographs, Calibration, Environmental sensing, Climatology

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Showing 5 of 13 publications

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