tropo_gacos: can not convert NaN to integer

[NMoghaddam]

Description of the problem

In order to use GACOS for tropospheric correction, I downloaded the .ztd files for my AOI; I managed to run the MintPy on the S1 time series with GACOS .zdt files; however, it seems there is something wrong with the data values. I haven't requested GACOS files for every single scene but selected three for each year (a total of nine .zdt files in Tiff format). The warnings are just for the missing GACOS files but the error came up after reading the first .ztd file as such:

Full script that generated the error

correct_tropo = "Perform" in tropo_choice.value or "Rerun" in tropo_choice.value
era5_path = mint_path/"ERA5"
timeseries_era5_path = mint_path/"timeseries_ERA5.h5"
inputs_era5_path = mint_path/"inputs/ERA5.h5"

if "Delete" in tropo_choice.value:
    for f in [timeseries_era5_path, inputs_era5_path]:
        try:
            f.unlink()
        except FileNotFoundError:
            pass
    try:
        shutil.rmtree(era5_path)
    except FileNotFoundError:
        pass

if correct_tropo:
    set_troposhperic_correction_mintpy(config_path, "gacos")
    !smallbaselineApp.py $config_path --work-dir {mint_path} --dostep load_data
    !smallbaselineApp.py $config_path --work-dir {mint_path} --dostep correct_troposphere
else:
    set_troposhperic_correction_mintpy(config_path, "no")
    !smallbaselineApp.py $config_path --work-dir {mint_path} --dostep load_data

Full error message

Potential bug with data values in GACOS tiff files [as attached]

System information

• Operating system: EarthScope InSAR OpenSARLab
• Python environment: Python 3.11 within the insar_analysis environment
• MintPy version: MintPy version 1.5.2
• Your custom / default template file (if the bug is related to a specific dataset):

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[yunjunz]

I am not sure why this error is happening. Could you debug at tropo_gacos.py#L43, or plot/print the delay, length, width variables?

[NMoghaddam]

I added the print command for delay,length and width in the tropo_gacos.py#L43 and run the workflow for GACOS... it seems that I can not get the value for each of those parameters, but a different error to the previous reported one as below.

I am not sure whether it has anything to do with the calculate_delay_timeseries and the following part:

and if so what it does mean?!

[yunjunz]

The new issue should be due to the empty hdf5 file generated in the previous run. Removing it and re-run should get rid of this latter issue.