Customizable RTC with Sentinel-1

[Ahleroy]

Following the Customisable RTC tutorial with Sentinel-1, I am facing this issue when it comes to using sarsen v0.9.3:

TypeError                                 Traceback (most recent call last)
Cell 18 line 1
----> gtc = apps.terrain_correction(
   product_urlpath=grd_local_path,
    measurement_group=measurement_group,
dem_urlpath=dem_path,
output_urlpath=os.path.join(
       tmp_dir, os.path.basename(product_folder) + ".10m.GTC.tif"
    ),
 )

TypeError: terrain_correction() got an unexpected keyword argument 'product_urlpath'

This happens when running In 13 of the tutorial which corresponds to the following piece of code:

gtc = apps.terrain_correction(
    product_urlpath=grd_local_path,
    measurement_group=measurement_group,
    dem_urlpath=dem_path,
    output_urlpath=os.path.join(
        tmp_dir, os.path.basename(product_folder) + ".10m.GTC.tif"
    ),
)

Looking at the sarsen API, it seems it has changed since the tutorial was made. However, I do not see any equivalent to how to use the new API.

[Ahleroy]

Digging into sensar's repository, I was able to found a workaround :

import json

def gtc(
    product_urlpath: str,
    measurement_group: str,
    dem_urlpath: str,
    output_urlpath: str = "GTC.tif",
    enable_dask_distributed: bool = False,
    client_kwargs_json: str = '{"processes": false}',
    chunks: int = 1024,
) -> None:
    """Generate a geometrically terrain corrected (GTC) image from Sentinel-1 product."""
    client_kwargs = json.loads(client_kwargs_json)
    real_chunks = chunks if chunks > 0 else None
    product = sarsen.sentinel1.Sentinel1SarProduct(
        product_urlpath,
        measurement_group,
    )
    return apps.terrain_correction(
        product,
        dem_urlpath,
        output_urlpath=output_urlpath,
        enable_dask_distributed=enable_dask_distributed,
        client_kwargs=client_kwargs,
        chunks=real_chunks,
    )
gtc = gtc(
    grd_local_path,
    measurement_group=measurement_group,
    dem_urlpath=dem_path,
    output_urlpath=os.path.join(
        tmp_dir, os.path.basename(product_folder) + ".10m.GTC.tif"
    ),
)

[TomAugspurger]

Thanks for the report. cc Alessandro Amici (@alexamici), is that the recommended way to handle the product_urlpath change?