Issue with sentinel-1-rtc authentication

[yizhanglulu]

running into authentication failure error message after setting up API key.

<Error>
<Code>AuthenticationFailed</Code>
<Message>Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. RequestId:116c323c-901e-0080-27c4-3f5381000000 Time:2023-02-13T16:00:58.6604566Z</Message>
<AuthenticationErrorDetail>Signature fields not well formed.</AuthenticationErrorDetail>
</Error>

Here is how I setup the API:

# Planetary Computer Tools
import pystac
import pystac_client
import odc
from pystac_client import Client
from pystac.extensions.eo import EOExtension as eo
from odc.stac import stac_load
import planetary_computer as pc

# Please pass your API key here
pc.settings.set_subscription_key("API KEY")

Then I try to acquire data through the following code and there's two places I used pc.sign. The 1st is before the for() loop and it seemed was ok to run, when I tested and manually stopped the process at 10% processed. But when I include the for() loop, I keep getting the authentication error quoted above. Not sure why and could someone help with this?

    vv_list = []
    vh_list = []
    vv_by_vh_list = []
    
    bbox_of_interest = [longitude , latitude, longitude, latitude]
    time_of_interest = time_slice
    
    catalog = pystac_client.Client.open("https://planetarycomputer.microsoft.com/api/stac/v1")
    search = catalog.search(collections=["sentinel-1-rtc"], bbox=bbox_of_interest, datetime=time_of_interest)
    items = list(search.get_all_items())
    item = items[0]
    items.reverse()
    
    data = stac_load([items[1]],bands=bands_of_interest, patch_url=pc.sign, bbox=bbox_of_interest).isel(time=0)

    for item in items:
        data = stac_load([item], bands=bands_of_interest, patch_url=pc.sign, bbox=bbox_of_interest).isel(time=0)
        if(data['vh'].values[0][0]!=-32768.0 and data['vv'].values[0][0]!=-32768.0):
            data = data.where(~data.isnull(), 0)
            vh = data["vh"].astype("float64")
            vv = data["vv"].astype("float64")
            vv_list.append(np.median(vv))
            vh_list.append(np.median(vh))
            vv_by_vh_list.append(np.median(vv)/np.median(vh))

[TomAugspurger]

Thanks. Can you:

1. Make sure the example is fully reproducible? A few variables aren't defined (longitude, latitude`, etc.). When I plug a few things in for those your script works fine.
2. Post the full traceback you're seeing
3. Confirm that you got your API key from https://planetarycomputer.developer.azure-api.net/?