Unable to load Radar data

[Adithiy R Nair]

I am trying to plot CAPPI and MAX Z using wradlib. The following is the error unable to decode time units 'seconds since yyyy-mm-ddThh:mm:ssZ' with "calendar 'gregorian'". Try opening your dataset with decode_times=False or installing cftime if it is not installed. After decode_times=False the the reading is happening through wradlib. The Coordinates for variables are time and range .  I am attaching a sample of the file that i want to plot A notebook for ploting CAPPI and MAX is much apreciated. 

[Vinay Singla]

Hlo, 

It's very easy to open the datasets.

Ph 8950389522

On Tue, 1 Nov 2022, 17:51 Adithiy R Nair, <adithi...@gmail.com> wrote:

I am trying to plot CAPPI and MAX Z using wradlib. The following is the error unable to decode time units 'seconds since yyyy-mm-ddThh:mm:ssZ' with "calendar 'gregorian'". Try opening your dataset with decode_times=False or installing cftime if it is not installed. After decode_times=False the the reading is happening through wradlib. The Coordinates for variables are time and range .  I am attaching a sample of the file that i want to plot A notebook for ploting CAPPI and MAX is much apreciated. 

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[Adithiy R Nair]

Hello Vinay Singla,

Opening data set is okay for me.But the main issue about creating a CAPPI plot or MAX. An example notebook will be appreciable using the above given data Because I am new to the wradlib and python

[Jorma Rahu]

Hey

There is a fairly detailed example to plot MAX product (also you need the 3d CAPPI grid) here: https://docs.wradlib.org/en/stable/notebooks/workflow/recipe2.html

Although it is for ODIM_H5 filetype, so you have to adjust the notebook a bit for your data.

Best regards

Jorma Rahu

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[Vinay Singla]

If I tell you the truth , given script doesn't work completely for indian radar file you need to use hit and trial method.

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[Hamid Ali Syed]

For IMD radar data, you can check PyScanCf library!

https://github.com/syedhamidali/PyScanCf

You can even plot CAPPI as well.

Best,

Hamid

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Syed, Hamid Ali 

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Department of Earth, Atmospheric, and Planetary Sciences, 

Purdue University, 

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[Hamid Ali Syed]

Here is how you can plot a CAPPI or MaxZ

https://github.com/syedhamidali/test_scripts/blob/master/MOSDAC_TERILS_Radar.ipynb

Best,

Hamid

[Kai Muehlbauer]

Hi,

thanks for all the comments and help already provided.

I just want to mention that we will move to

https://openradar.discourse.group

for discussion on weather radar.

To your question, there are several issues with your data.

1. time unit attribute is broken
2. time_coverage_start is non-standard
3. time_coverage_end is empty
4. sweep_start_ray_index/sweep stop_ray_index with erroneous values

This can be fixed using wradlib. I'll gladly answer this if you open a
discussion on the above discourse. It's more easy to link to resources,
format code and keep track over there.

Thanks!

Best
Kai

Am 01.11.22 um 13:21 schrieb Adithiy R Nair:

> I am trying to plot CAPPI and MAX Z using wradlib. The following is the

> error *unable to decode time units 'seconds since yyyy-mm-ddThh:mm:ssZ'

> with "calendar 'gregorian'". Try opening your dataset with

> decode_times=False or installing cftime if it is not installed.* After
> *decode_times=False* the the reading is happening through wradlib. The

> Coordinates for variables are time and range . I am attaching a sample of

> the file that i want to plot *A notebook for ploting CAPPI and MAX is much
> apreciated. *
>
>

[Adithiy R Nair]

Sure

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