# HARP regridding and saving L3 Sentinel 5p data to netCDF

**URL:** https://forum.atmospherictoolbox.org/t/harp-regridding-and-saving-l3-sentinel-5p-data-to-netcdf/160
**Category:** HARP
**Tags:** sentinel-5p, python
**Created:** [June 8, 2020, 3:46am UTC](https://forum.atmospherictoolbox.org/t/harp-regridding-and-saving-l3-sentinel-5p-data-to-netcdf/160 "2020-06-08T03:46:40Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![pravashtiwari](https://forum.atmospherictoolbox.org/letter_avatar_proxy/v4/letter/p/f04885/32.png) [@pravashtiwari](https://forum.atmospherictoolbox.org/u/pravashtiwari)
#### Post date: [June 8, 2020, 3:46am UTC](https://forum.atmospherictoolbox.org/t/harp-regridding-and-saving-l3-sentinel-5p-data-to-netcdf/160/1 "2020-06-08T03:46:40Z")

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Hello Respected Researchers and Scientist,  
I am new to using python for processing of Sentinel 5p datasets, I previously had been processing it in R and regridding the datasets in GMT.  
I was using Harp to convert multiple granules of sentinel 5p data into a uniform grid and saving them as Level 3 product so that I can further carry out statistical analysis. However, I am constantly getting an error in the “keep” line of harp code.  
I will attach the Screenshot of my code and the error.

 ![Screenshot (192)](https://forum.atmospherictoolbox.org/uploads/default/original/1X/ca9873fd8dc0008eec5822f2471cdfe50469f2ca.png)  
I am highly grateful to the forum for their previous post regarding the topic that helped me a lot to write this code.  
Could you please extend your help for a way out of this problem.  
Thanks in advance  
Pravash Tiwari  
Student  
Nepal

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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: [June 8, 2020, 6:06am UTC](https://forum.atmospherictoolbox.org/t/harp-regridding-and-saving-l3-sentinel-5p-data-to-netcdf/160/2 "2020-06-08T06:06:58Z")

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Please check your code carefully. You have typos in your first derive command.

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### Author: ![pravashtiwari](https://forum.atmospherictoolbox.org/letter_avatar_proxy/v4/letter/p/f04885/32.png) [@pravashtiwari](https://forum.atmospherictoolbox.org/u/pravashtiwari)
#### Post date: [June 8, 2020, 6:25am UTC](https://forum.atmospherictoolbox.org/t/harp-regridding-and-saving-l3-sentinel-5p-data-to-netcdf/160/3 "2020-06-08T06:25:50Z")

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> [@svniemeijer](#):
>
> heck your code carefully. You have typos in your first derive command

So silly  
I am really sorry for wasting your time  
Thanks

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### Author: ![tzehuey85](https://forum.atmospherictoolbox.org/letter_avatar_proxy/v4/letter/t/ed8c4c/32.png) [@tzehuey85](https://forum.atmospherictoolbox.org/u/tzehuey85)
#### Post date: [August 31, 2020, 1:25am UTC](https://forum.atmospherictoolbox.org/t/harp-regridding-and-saving-l3-sentinel-5p-data-to-netcdf/160/4 "2020-08-31T01:25:51Z")

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Hi Pravashtiwari,

Would you mind to share with me your coding because I’m looking coding to process Sentinel-5P

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### Author: ![tyhayward](https://forum.atmospherictoolbox.org/user_avatar/forum.atmospherictoolbox.org/tyhayward/32/84_2.png) [@tyhayward](https://forum.atmospherictoolbox.org/u/tyhayward)
#### Post date: [September 8, 2020, 11:16am UTC](https://forum.atmospherictoolbox.org/t/harp-regridding-and-saving-l3-sentinel-5p-data-to-netcdf/160/5 "2020-09-08T11:16:40Z")

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Hi,

Here is a youtube tutorial provided by RUS which demonstrates how to process S5P using HARP.

[![](https://img.youtube.com/vi/CE6BeLPORIE/maxresdefault.jpg "RUS Webinar: Pollution Monitoring with Sentinel-5p - ATMO02") ](https://www.youtube.com/watch?v=CE6BeLPORIE)