A issue with coda python(how to obtain beijing's data)

CODA
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PYTHON
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Excuse me,I don’t know how to select latitude and longitude to obtain beijing’s data by writing code,can you give me help? Thank you!

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Dear Huanguang,

Could you provide some more information as to which product you are trying to import? is it included in the harp definitions for e.g.? see list here: Ingestion definitions — HARP 1.15 documentation (stcorp.github.io)

If it is, it is better to use harp.import_product which allows all sorts of nice operations to be performed already at the product ingestion step.

If not, then I typically perform a post-processing of the arrays, selecting data within a certain radius for the location I am interested in using haversine, haversine · PyPI

Best wishes,
MariLiza

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Dear mariliza,
If the data I want to import (such as the estimated error of the Aeolus level 2B product) is not included in the harp definition, how do Iimport it?
I really hope to get your reply. Thank you for your help.
Best wishes,
LiShiYu

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Good morning LiShiYu,

In the case that I wish to import a satellite product, or a variable, which is not in the ingestion definitions, then I use the coda module. Hence, two options exist:

  1. Either you read the satellite product using coda and transform the file into a hard-compliant file. An example can be found here, Problem with HARP/Python within a loop - HARP - Atmospheric Toolbox. You basically open the file, ingest the parameters you want using coda.fetch and output into a new harp compliant file.

  2. You use harp import product to import the already harp-compliant satellite file, and you add a parameter to the product dataframe using coda.fetch. Then again you output to a new file that you can work with.

Best wishes,
MariLiza

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Dear mariliza,
I successfully import the variable according to the first option you mentioned. Thank you for your time!
Best wishes,
LiShiYu