The DLR Geoservices web-server contains NO2 concentration at surface level derived from Sentinel-5P/TROPOMI satellite data (for Germany):
https://download.geoservice.dlr.de/SVELD/files/

The data product is an outcome of the S-VELD project, which is funded by the German Federal Ministry of Transport and Digital Infrastructure in the framework of the mFUND-Programme (FKZ: 19F2065A).

Two types of surface NO2 products are available:

1) "Daily" product containing surface NO2 concentration data for each the day covering Germany.
The daily products are stored in zip-files in the sub-directory: 'daily/'
The file name has the folllowing structure: S5P_TROPOMI_NO2SURF_DAILY_YYYYMMDD.zip 

2) "Monthly" product containing monthly averaged surface NO2 concentration data covering Germany.
The monthly products are stored in zip-files in the sub-directory: 'monthly/'
The file name has the folllowing structure: S5P_TROPOMI_NO2SURF_MONTH_YYYYMM.zip

Quick look images are included in the zip-file for download.

To download multiple data-files from the DLR Geoservices web-server, you can use download software such as "wget" and "curl".
For example, you can use the following "wget" command to download all daily products for one month:
"wget -r -nH --cut-dirs=4 https://download.geoservice.dlr.de/SVELD/files/daily/YYYY/MM/"

The product user manual (PUM) for the surface NO2 concentration products can be downloaded at:
https://atmos.eoc.dlr.de/sveld/doc/S-VELD_S5P_NO2_PUM.pdf


User can also visit the S-VELD pages on the DLR Geoservice web-site for interactive images:
https://geoservice.dlr.de/web/maps/de:sveld:no2surf:orbit
https://geoservice.dlr.de/web/maps/de:sveld:no2surf:monthly


The S-VELD data product is produced and distributed by the DLR under the CC-BY-NC 4.0 license.
https://creativecommons.org/licenses/by-nc/4.0/

For more information about the S-VELD project, please visit:
https://atmos.eoc.dlr.de/sveld

Should you have any question or special request, please contact us by email (Pieter Valks: pieter.valks@dlr.de).

