possible bug in int2P2H

[DennyChee]

the val calculated by the end flag did not make sense as it was calculating a pressure value of ~102 at a higher altitude, which was greater than the previous value of 100 at a lower altitude in test_calc.py

Summary by Sourcery

Bug Fixes:

• Correct the calculation of pressure values in the intP2H function by changing the operation from subtraction to addition when the end flag is true.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This PR fixes a bug in the interpolation calculation within the intP2H function. The change modifies the formula used to calculate pressure values at higher altitudes by changing a subtraction operation to an addition, which resolves an issue where pressure values were incorrectly increasing with altitude.

Class diagram for intP2H function changes

classDiagram
    class intP2H {
        - lvls
        - hgt
        - gph
        - tmp
        - vpr
        - cdic
        - verbose
        + intP2H(lvls, hgt, gph, tmp, vpr, cdic, verbose)
        + // Modified calculation for pressure values
    }
    note for intP2H "The calculation for pressure values at higher altitudes was changed from subtraction to addition."

File-Level Changes

Change	Details	Files
Fixed interpolation formula for pressure calculation at altitude boundaries	Changed the sign in the interpolation formula from subtraction to addition Corrected the calculation to prevent illogical pressure increases at higher altitudes Applied the same fix to three identical code blocks handling different cases	src/pyaps3/processor.py

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[codeautopilot[bot]]

PR summary

This Pull Request addresses a potential bug in the intP2H function within the processor.py file. The issue was that the calculation of a pressure value at a higher altitude was incorrectly resulting in a value greater than the pressure at a lower altitude. The fix involves changing the calculation from subtracting to adding a term, which corrects the pressure value computation to reflect a more realistic atmospheric pressure gradient.

Suggestion

To ensure the robustness of this fix, it would be beneficial to add or update unit tests in test_calc.py to verify that the pressure values now decrease with increasing altitude, as expected. This will help prevent similar issues in the future and confirm that the fix works as intended across different scenarios.

Disclaimer: This comment was entirely generated using AI. Be aware that the information provided may be incorrect.

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[yunjunz]

Please provide more description and the value / plot comparison before / after the bugfix proposal.

[DennyChee]

For the interpolation of pressure values within processor.py, the eFlag interpolation gives ~102 which i think is a wrong value at the highest elevation. I used the test_calc.py data

If my understanding is correct, the interpolated pressure value should be lower than 100 since it is at a higher elevation. After changing the - to +, it gives a lower pressure value

Im not sure if a similar change for the interpolation of temperature and vapor pressure values is needed