A5012063326- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Spectroscopy and Laser Applications
- Material Dynamics and Properties
- Spectroscopy and Chemometric Analyses
- Ionosphere and magnetosphere dynamics
- Optical Polarization and Ellipsometry
- Liquid Crystal Research Advancements
- Surfactants and Colloidal Systems
- Calibration and Measurement Techniques
- Ocular and Laser Science Research
- Optical Imaging and Spectroscopy Techniques
- Coastal and Marine Dynamics
- Atmospheric aerosols and clouds
- Advancements in Photolithography Techniques
- Glass properties and applications
- Regional Economic and Spatial Analysis
- Potato Plant Research
- Cardiovascular Health and Disease Prevention
- Optical Systems and Laser Technology
- Spectroscopy and Quantum Chemical Studies
- Coastal wetland ecosystem dynamics
- Photorefractive and Nonlinear Optics
National Institute for Public Health and the Environment
2024
Royal Netherlands Meteorological Institute
2006-2012
Philips (Finland)
2001-2002
VSL Dutch Metrology Institute
1995
University of Amsterdam
1995
We review the standard nitrogen dioxide (NO 2 ) data product (Version 1.0.), which is based on measurements made in spectral region 415–465 nm by Ozone Monitoring Instrument (OMI) NASA Earth Observing System‐Aura satellite. A number of ground‐ and aircraft‐based have been used to validate product's three principal quantities: stratospheric, tropospheric, total NO column densities under nearly or completely cloud‐free conditions. The validation OMI complicated a factors, greatest that...
This paper describes the algorithm for deriving total column ozone from spectral radiances and irradiances measured by Ozone Monitoring Instrument (OMI) on Earth Observing System Aura satellite. The is based differential optical absorption spectroscopy technique. main characteristics of as well an error analysis are described. has been successfully applied to first available OMI data. First comparisons with ground-based instruments very encouraging clearly show potential method.
This paper is an overview of the validation total column ozone data products from Ozone Monitoring Instrument (OMI) on board NASA EOS‐Aura satellite. OMI imaging UV/visible spectrometer that maps global a daily basis. There are two OMI, one derived using traditional TOMS retrieval algorithm and another Differential Optical Absorption Spectroscopy being developed to take advantage hyperspectral capabilities OMI. Validation primarily performed through comparison with network Dobson Brewer...
We have performed static scattering experiments on the transition in time from a fluidlike sol to solidlike gel of suspension disk-shaped charged colloidal particles. The combination light and small angle x-ray probes more than three orders magnitude vector $q$. At smallest $q$ structure factor $S(q)$ shows ${q}^{\ensuremath{-}d}$ dependence both state. algebraic exponent $d$ evolves $2.8$ $2.1$ during gelation. find that is not comparable simple liquid but rather low-viscosity precursor...
In this paper we present validation results of the total ozone column data products Ozone Monitoring Instrument (OMI) on board NASA EOS‐AURA satellite through comparisons with ground‐based observations by Dobson and Brewer spectrophotometer instruments. Quality‐controlled archived from these instruments located at stations worldwide have been used to validate more than 2 a OMI. There are two operationally available products, based OMI‐TOMS OMI‐DOAS retrieval algorithms, respectively....
Abstract. In June 2009, 22 spectrometers from 14 institutes measured tropospheric and stratospheric NO2 the ground for more than 11 days during Cabauw Intercomparison Campaign of Nitrogen Dioxide measuring Instruments (CINDI), at Cabauw, NL (51.97° N, 4.93° E). All visible instruments used a common wavelength range set cross sections spectral analysis. Most were multi-axis design with analysis by differential spectroscopy software (MAX-DOAS), whose non-zenith slant columns compared examining...
Abstract. From June to July 2009 more than thirty different in-situ and remote sensing instruments from all over the world participated in Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI). The took place at KNMI's Experimental Site Atmospheric Research (CESAR) Netherlands. Its main objectives were determine accuracy of state-of-the-art ground-based measurement techniques detection atmospheric nitrogen dioxide (both sensing), investigate their usability...
We present a dynamic light scattering study on the sol-gel transition of suspension disk-shaped colloidal particles in water. obtain static and fluctuating part scattered intensity, fraction frozen-in density fluctuations, intermediate function from local time-averaged measurement intensity correlation intensity. The is marked by drastic change shows stretching translational time over more than five orders magnitude. In gel phase power-law decay, with concentration dependent scaling...
We present a sensitivity analysis of the tropospheric NO 2 retrieval from Ozone Monitoring Instrument (OMI) using measurements Dutch Aerosol and Nitrogen Dioxide Experiments for Validation OMI SCIAMACHY (DANDELIONS) Intercontinental Chemical Transport Experiment‐B (INTEX‐B) campaigns held in 2006. These unique covered wide range pollution conditions provided detailed information on vertical distribution . During DANDELIONS campaign, profiles were measured with lidar highly polluted region...
[1] In this paper we present the validation results of operational vertical ozone profiles retrieved from nadir observations by Ozone Monitoring Instrument (OMI) aboard NASA Earth Observing System (EOS) Aura platform. The profile retrieval algorithm was developed at Royal Netherlands Meteorological Institute and OMI mission data has been processed made publicly available. Advantages these sounded are excellent spatial resolution daily global coverage while is limited to 6–7 km. Comparisons...
This article focuses on the comparison of total ozone column data from Ozone Monitoring Instrument (OMI) flying aboard NASA EOS‐Aura satellite platform with ground‐based measurement recorded by Brewer spectroradiometers located at five Spanish remote sensing ground stations between January 2005 and December 2007. The are derived two algorithms: OMI Total Mapping Spectrometer (OMI‐TOMS) Differential Optical Absorption Spectroscopy (OMI‐DOAS). largest relative differences these estimates reach...
The Ozone Monitoring Instrument (OMI) project team uses two total ozone retrieval algorithms in order to maintain the long‐term record established with Total Mapping Spectrometer (TOMS) data as well improve column estimate using hyperspectral capability of OMI. purpose this study is assess where produce comparable results and differences are significant. Starting same set Earth reflectance data, used have been derived OMI‐TOMS OMI–Differential Optical Absorption Spectroscopy (DOAS)...
Ground‐based UV‐visible instruments for NO 2 vertical column measurements have been operating at Issyk‐Kul station, in Kyrgyzstan, and Observatoire de Haute‐Provence (OHP), France, since 1983 1992, respectively. These already used validation of ERS‐2 Global Ozone Monitoring Experiment (GOME) Envisat Scanning Imaging Absorption Spectrometer Atmospheric Cartography (SCIAMACHY) data. Building upon the successful missions GOME SCIAMACHY, (OMI) was launched by NASA onboard EOS Aura satellite July...
In this paper we present validation results of the total ozone column data products Ozone Monitoring Instrument (OMI) by using airborne observations CCD Actinic Flux Spectrometer (CAFS) instrument. CAFS was flown during Aura Validation Experiment (AVE) campaigns organized NASA in support EOS‐Aura satellite products. The accuracy individual estimates 2.0% on average is sufficient to meet OMI requirements 3.0%. A climatology used estimate below aircraft altitude. AVE show that OMI‐TOMS product...
This article focuses on the global‐scale validation of empirically corrected Version 8 total ozone column data set acquired by NASA Total Ozone Mapping Spectrometer (TOMS) during period 1996–2004 when this instrument was flying aboard Earth Probe (EP) satellite platform. analysis is based use spatially co‐located, ground‐based measurements from Dobson and Brewer spectrophotometers. The original EP‐TOMS V8 also validated with these to quantify improvements made empirical correction that...
[1] This article focuses on the validation of total ozone column (TOC) data set acquired by Global Ozone Monitoring Experiment (GOME) and Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) satellite remote sensing instruments using Total Retrieval Scheme GOME Instrument Based (TOGOMI) SCIAMACHY (TOSOMI) retrieval algorithms developed Royal Netherlands Meteorological Institute. In this analysis, spatially colocated, daily averaged ground-based observations...
Background The wide application of machine learning (ML) holds great potential to improve public health by supporting data analysis informing policy and practice. Its application, however, is often hampered fragmentation across organisations strict regulation the General Data Protection Regulation (GDPR). Federated (FL), as a decentralised approach ML, has received considerable interest means overcome data, but it yet unclear which extent this complies with GDPR. Aim Our aim was understand...
This paper focuses on the validation of empirically corrected total ozone column (TOC) data provided by Earth Probe Total Ozone Mapping Spectrometer (EP-TOMS) using ground-based measurements recorded a well-calibrated Brewer spectroradiometer located at El Arenosillo (Spain). In addition, satellite TOC observations derived from Monitoring Instrument (OMI) with TOMS algorithm are also used in this paper. The agreement between EP-TOMS and is excellent (R <sup...
Ground‐based observations with a Fourier transform spectrometer in the infrared region (FTIR) were performed Kiev (Ukraine) during time frames August–October 2005 and June–October 2006 within Ozone Monitoring Instrument (OMI) validation project 2907 entitled “OMI by ground based remote sensing: ozone columns profiles” frame of international European Space Agency/Netherlands Agency for Aerospace Programmes/Royal Dutch Meteorological Institute OMI Announcement Opportunity effort. column data...
Verification of the geolocation assigned to individual ground pixels as measured by Ozone Monitoring Instrument (OMI) aboard NASA EOS‐Aura satellite was performed comparing geophysical Earth surface details observed in OMI false color images with high‐resolution continental outline vector map provided Interactive Data Language (IDL) software tool from ITT Visual Information Solutions. The are generated visible channel integration over 20‐nm‐wide spectral bands radiance intensity around 484...
The analysis of non-stationary signals calls for specific tools which go beyond classical Fourier analysis. Here we present the discrete wavelet transform as a quantitative method to analyse scaling properties and chaotic obtained by light scattering. is performed directly on time-resolved scattered intensity. result exponent underlying power spectrum frequency window where can be observed. These are with higher accuracy in fraction time compared intensity correlation functions. As test...
Daily total ozone column (TOC) measurements from the Brewer spectroradiometer located at El Arenosillo (Spain) and Spectrometer for Atmospheric TRAcers Monitoring (SPATRAM) Évora (Portugal) are analyzed period 2006–2008. The main goal of this study is to compare TOC estimates retrieved with passive differential optical absorption spectroscopy (DOAS) methodology zenith‐sky observations by SPATRAM spectrometer highly accurate direct‐sun recordings a well‐calibrated instrument. On average,...
A comprehensive data set of partial ozone columns was derived from the charge‐coupled device (CCD) Actinic Flux Spectroradiometer (CAFS) measurements taken during Polar 2005, Houston and Costa Rica 2006 Aura Validation Experiments (AVE). It used to validate colocated daytime Microwave Limb Sounder (MLS) along aircraft tracks over diverse geophysical conditions. Results show that MLS v.1.5 CAFS agree better than 3% at pressure levels 100 146 hPa, 5% 215 hPa level. The column differences...
Abstract. From June to July 2009 more than thirty different in-situ and remote sensing instruments from all over the world participated in Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI). The took place at KNMI's Experimental Site Atmospheric Research Netherlands. Its main objectives were determine accuracy of state-of-the-art ground-based measurement techniques detection atmospheric nitrogen dioxide (both sensing), investigate their usability satellite...