Third Cabauw Intercomparison of Nitrogen Dioxide measuring Instruments (CINDI-3)

The third Cabauw Intercomparison of Nitrogen Dioxide measuring Instruments took place at the Cabauw Atmospheric Research Station from 21 May until 24 June 2024. Cabauw is one of the main facilities of the Dutch Ruisdael Observatory located midway between the cities of Rotterdam and Utrecht, and managed by KNMI. Over 100 researchers from 18 countries worldwide participated in CINDI-3, operating 32 UV-VIS DOAS instruments to compare and intercalibrate measurements of air pollutants and to support the validation of earth observation satellite measurements from space-borne instruments such as Sentinel-5p/TROPOMI and Sentinel-4 and Sentinel-5. CINDI-3 is the third intercomparison campaign of this kind. The overall campaign planning and coordination was carried out by a steering committee, led by BIRA-IASB (Royal Belgian Institute for Space Aeronomy) and KNMI, coordinating the CINDI-3 intercomparison schedule and all additional activities such as the mobile and aircraft observations. The main science objectives of CINDI-3 are the following:



* To assess the consistency of slant column measurements of several key target species (NO2, ozone, O2-O2 and HCHO) of relevance for the validation of S5P and the future ESA atmospheric Sentinels, through coordinated operation of a large number of DOAS and MAXDOAS instruments from all over the world.

* To study the relationship between remote-sensing column- and profile-measurements of NO2, HCHO and ozone and reference in-situ concentration measurements of the same species.

* To investigate the horizontal representativeness of MAXDOAS measuring systems in view of their use for the validation of satellite tropospheric measurements featuring ground pixel areas in the range of 25-50 km2.

Simple

Date (Publication)
2025-10-27
Edition

version 0
Citation identifier
urn:xkdc:ds:nl.knmi::CINDI3/1.0/
Purpose

Compare and intercalibrate measurements of air pollutants
Status
On going
Point of contact
Organisation name Individual name Electronic mail address Role

Koninklijk Nederlands Meteorologisch Instituut (KNMI)

opendata@knmi.nl

Point of contact
Maintenance and update frequency
As needed

DG Discovery Properties Vocabulary 1.0

  • Sunshine and radiation

  • Pollution

  • Air quality

  • Nitrogen

  • Cabauw

  • Campaign

  • MAX-DOAS

  • Lidar

  • Aerosol

  • Brewer

  • Ceilometer

  • Ozone

  • Radiometer

  • Radiosonde

  • Pandora

  • Satellite

  • Tropomi

  • Climate
Keywords

  • Ruisdael

  • External
Use limitation

Contact dataset manager
Access constraints
Other restrictions
Other constraints

https://creativecommons.org/licenses/by/4.0/deed.nl

Classification
Unclassified
Language
English
Character set
UTF8
Topic category
  • Climatology, meteorology, atmosphere
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S
E
W
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Begin date
2024-05-21
End date
2024-06-28
Supplemental Information

For more information on this campaign and the Ruisdael project, see: https://ruisdael-catalog.citg.tudelft.nl/index.php?title=CINDI-3.

Reference system identifier
http://www.opengis.net/def/crs/EPSG/0/4326
Distribution format
Name Version

ZIP

1.0

Distributor

Distributor contact
Organisation name Individual name Electronic mail address Role

Koninklijk Nederlands Meteorologisch Instituut (KNMI)

opendata@knmi.nl

Point of contact
Ordering instructions

The dataset is stored in the SURF Research Drive at the path https://knmi.data.surf.nl/f/5888104. This dataset cannot be retrieved via the KNMI Data Platform. If you do not have access to the storage location mentioned above, please contact opendata@knmi.nl .

Digital transfer options

OnLine resource
Protocol Linkage Name

landingpage

 		https://dataplatform.knmi.nl/catalog/datasets/index.html?x-dataset=CINDI3&x-dataset-version=1.0

KNMI Data Platform
Hierarchy level
Dataset
Statement

See link to Ruisdael CINDI3 campaign website in Supplemental Information.

Metadata

File identifier
e7dd77d0-9f97-11f0-835b-f2d04b14f78f XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2025-12-09T13:01:42.845565Z
Metadata standard name

ISO 19115
Metadata standard version

ISO 19115:2003 NL Kernset 1.3 KNMI 2.1.0
Metadata author
Organisation name Individual name Electronic mail address Role

Koninklijk Nederlands Meteorologisch Instituut (KNMI)

opendata@knmi.nl

Point of contact
Other language
Language Character encoding
Dutch; Flemish
English UTF8
 
 

Overviews

Spatial extent

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Keywords



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