Tropomi - VCD data for O3 and NO2

[pedrorodrigues.48203]

Hello

I am a master's student at the University of Évora.

I need to obtain the daily data from the vertical columns of NO2 and O3 obtained by Tropomi between 2018 and the present for the city of Évora (38.5709, -7.9199) in Portugal.

What is the easiest procedure I should follow?

https://search.earthdata.nasa.gov/search/granules?p=C1918209846-GES_DISC&pg[0][v]=f&pg[0][gsk]=-start_date&sp[0]=-7.91990%2C38.57096&qt=%2C2026-03-14T23%3A59%3A59.000Z&ot=2018-01-01T00%3A00%3A00.000Z%2C2018-12-31T23%3A59%3A59.999Z&fi=TROPOMI&lat=-3.8211102683499973&long=146.25&zoom=1

Best regards

[GES DISC - bomitch1]

Hello,

In addition to the TROPOMI MINDS NO2 data we recommended to you in the following post (viewtopic.php?t=6400), our team would like to let you know of the following TROPOMI S5P products. These have a longer temporal coverage (2018-present) than the TROPOMI MINDS collection:

S5P_L2__O3_TOT_HiR.2
Sentinel-5P TROPOMI Total Ozone Column 1-Orbit L2 5.5km x 3.5km V2
(https://disc.gsfc.nasa.gov/datasets/S5P_L2__O3_TOT_HiR_2/summary?keywords=S5P_L2__O3_TOT_HiR.2)

S5P_L2__NO2____HiR.2
Sentinel-5P TROPOMI Tropospheric NO2 1-Orbit L2 5.5km x 3.5km V2
(https://disc.gsfc.nasa.gov/datasets/S5P_L2__NO2____HiR_2/summary?keywords=S5P_L2__NO2____HiR.2)

Note that for NO2 there no total column collection available from Sentinel-5P outside of MINDS, only tropospheric data. Both of these collections are available to download via Earthdata Search or from the GES DISC Dataset Landing pages (links above). Links to Earthdata Search are listed below:

S5P_L2__O3_TOT_HiR.2
https://search.earthdata.nasa.gov/search?q=S5P_L2__O3_TOT_HiR&ff=Customizable

S5P_L2__NO2____HiR.2
https://search.earthdata.nasa.gov/search?q=S5P_L2__NO2____HiR&ff=Customizable

Each of these collections are enabled with subsetting services. The size of granules for these collections are on the order of a few hundred MB per file. To manage download volume it is recommended to subset variables you are interested in from each collection and if applicable perform spatial subsetting. These options are available via Earthdata Search or the GES DISC dataset landing pages.

To subset via Earthdata Search: Specify your spatial and temporal parameters, and then select your desired granules and click download. From here select the “Customize with Harmony” option and then you can specify the desired variables you’d like to download. And then download via the Earthdata Download client.

To subset via GES DISC Dataset Landing page: Navigate to “Data Access” on the right and then the Subset/Get Data button. From here select the GES DISC subsetter option listed under the “Download Methods”. Then select your spatial, temporal, and variable parameters, then click download. This will populate a list of URLs containing the subsetted files which can be downloaded with an external utility (e.g. wget or curl). Detailed instructions on how to download URLs can be found at the data access help page (https://disc.gsfc.nasa.gov/information/documents?title=Data%20Access).

If you are interested in a more programmatic approach to accessing and downloading data from this collection, please follow the instructions in this “How to Subset and Download Level 2, 3, and 4 GES DISC Data Using Python” guide. (https://disc.gsfc.nasa.gov/information/howto?title=How%20to%20Subset%20and%20Download%20Level%202,%203,%20and%204%20GES%20DISC%20Data%20Using%20Python)

Please let us know if you have any questions or encounter any issues.