# 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:** 19

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### Author: ![ryan](https://forum.atmospherictoolbox.org/letter_avatar_proxy/v4/letter/r/a8b319/32.png) [@ryan](https://forum.atmospherictoolbox.org/u/ryan)
#### Post date: [April 1, 2020, 8:13am UTC](https://forum.atmospherictoolbox.org/t/map-sentinel-5p-ch4-so2-and-co-data-visan/45/19 "2020-04-01T08:13:30Z")

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> [@svniemeijer](#):
>
> volume mixing ratio of the whole column

Can this be done for NO2? I’m using following code:

harp.import\_product(paths\_2[i],  
operations=“ **tropospheric\_NO2\_column\_volume\_mixing\_ratio** \_validity\>75;keep(latitude\_bounds,longitude\_bounds\*\*,tropospheric\_NO2\_column\_volume\_mixing\_ratio\*\*);bin\_spatial(7,35.7,0.1,7,14.1,0.1);derive(**tropospheric\_NO2\_column\_volume\_mixing\_ratio [ppbv]**)”,  
post\_operations= “bin();squash(time, (latitude\_bounds,longitude\_bounds));derive(latitude {latitude});derive(longitude {longitude});exclude(latitude\_bounds,longitude\_bounds,latitude\_bounds\_weight,longitude\_bounds\_weight,count,weight)”))

and getting the error: cannot filter on non-existent variable tropospheric\_NO2\_column\_volume\_mixing\_ratio\_validity

Thanks!

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