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Hi all,


I’m trying to extract the metadata of a Sentinel-1 scene. I’ve followed several tutorials and examples, but the userData.json file returned is null every time, which doesn’t happens for Sentinel-2 scenes. I don’t know if I’m missing something or the scenes for Sentinel-1 are different. It’s important to say that the image is from one specific day, not a mosaic.


The evalscript I use is the following:


                //VERSION=3

                function setup() {

                    return {

                        input:  {

                            bands:  "VH", "VV"]

                        }],

                        mosaicking: Mosaicking.ORBIT,

                        output: {

                            id: "default",

                            bands: 2

                        }

                    };

                }



                function evaluatePixel(sample) {

                    return  sample.VH, sample.VV];

                }



                function updateOutputMetadata(scenes, inputMetadata, outputMetadata) {

                    outputMetadata.userData = { "scenes":  scenes.orbits }

                }

Hi,


I cannot reproduce your problem: I get a populated userdata file for Sentinel-1, even for a single date using your Evalscript. Would you care to share your payload so we can take a look?

Sure, I attach the rest of the code




time = ('2021-09-26', '2021-09-26')

bbox = (101.298014, 17.297079, 101.347986, 17.343721)



process_requests = list()

request = SentinelHubRequest(

                    data_folder=data_folder,

                    evalscript=evalscript,

                    input_data=[

                        SentinelHubRequest.input_data(

                            data_collection=DataCollection.SENTINEL1,

                            time_interval=time,

                            mosaicking_order=None

                        )

                    ],

                    responses=[

                                SentinelHubRequest.output_response("default", MimeType.TIFF),

                                SentinelHubRequest.output_response("userdata", MimeType.JSON),

                    ],

                    bbox=bbox,

                    size=bbox_to_dimensions(bbox, 1000),

                    config=config,

                )

                process_requests.append(request)



download_client = SentinelHubDownloadClient(config=config)

download_requests = [request.download_list[0] for request in process_requests]

data = download_client.download(download_requests)

Very strange… when I run your code I get the following:


'userdata.json': {'scenes': :{'tiles': :{'date': '2021-09-26T23:08:35Z',

       'shId': 2468928,

       'tileOriginalId': 'S1A_IW_GRDH_1SDV_20210926T230835_20210926T230900_039859_04B728_9D6F',

       'dataPath': 's3://sentinel-s1-l1c/GRD/2021/9/26/IW/DV/S1A_IW_GRDH_1SDV_20210926T230835_20210926T230900_039859_04B728_9D6F'}],

     'dateTo': '2021-09-26T23:59:59Z',

     '__idx': 0,

     'dateFrom': '2021-09-26T00:00:00Z'}]}}

I did modify the code for it to run with:


coords = (101.298014, 17.297079, 101.347986, 17.343721)

bbox = BBox(coords, crs="EPSG:4326")

but asides from this all is the same as you!

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