# Map Sentinel 5p CH4, SO2 and CO Data (Visan)

**URL:** https://forum.atmospherictoolbox.org/t/map-sentinel-5p-ch4-so2-and-co-data-visan/45
**Category:** HARP
**Tags:** sentinel-5p, python
**Created:** [November 16, 2019, 5:37pm UTC](https://forum.atmospherictoolbox.org/t/map-sentinel-5p-ch4-so2-and-co-data-visan/45 "2019-11-16T17:37:06Z")
**Posts on this page:** 1
**Showing post:** 22

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### Author: ![sander.niemeijer](https://forum.atmospherictoolbox.org/user_avatar/forum.atmospherictoolbox.org/sander.niemeijer/32/5_2.png) [@sander.niemeijer](https://forum.atmospherictoolbox.org/u/sander.niemeijer)
#### Post date: [April 1, 2020, 9:27am UTC](https://forum.atmospherictoolbox.org/t/map-sentinel-5p-ch4-so2-and-co-data-visan/45/22 "2020-04-01T09:27:19Z")

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If your ground based data is surface data, then this might be difficult. S5P provides a full tropospheric column, but is actually almost non sensitive at the surface (you can see this from the averaging kernel).  
For validation you can check out what is done on the [official validation server for S5P](https://mpc-vdaf-server.tropomi.eu/no2)

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