How to get the date of RGB image from L8 satellite?

I have the following payload which I’m trying on L8 API :

url = "https://services-uswest2.sentinel-hub.com/api/v1/process"

   payload = {

                "input": {

                    "bounds": {

                        "properties": {

                            "crs": "http://www.opengis.net/def/crs/EPSG/0/32719"

                        },

                        "bbox": bbox_rgb

                    },

                    "data": :

                        {

                            "type": RGB_TYPE,

                            "dataFilter": {

                                "timeRange": {

                                    "from":strt_dt,

                                    "to":end_dt

                                }

                            }

                        }

                    ]

                },

                "output":{"resx":10,"resy":10,

                "responses":"{

                    "identifier": identifier,

                    "format":{"type":"image/jpeg"}

                }]}, 

                # "output":{"width":1000,"height":940},

                "evalscript": evalscript

            }





eval_script_rgb = """

//VERSION=3









let minVal = 0.0;

let maxVal = 0.4;

let viz = new HighlightCompressVisualizer(minVal, maxVal);

function evaluatePixel(samples) {

     let sudoPanW = (samples.B04 + samples.B03 + samples.B02 * 0.4) / 2.4;

     let ratioW = samples.B08 / sudoPanW;

     let val = =samples.B04 * ratioW, samples.B03 * ratioW, samples.B02 * ratioW];

     val = viz.processList(val);

     val.push(samples.dataMask); 

     return val;

}

function setup() {

     return {

          input: :{

               bands: :"B02","B03","B04","B08","dataMask" ]

          }], 

          output: { 

               bands: 4

          }

     }

}









"""

I can download the image but I want to know the exact date when the image was available. Is there any method to do this using the API?

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Hello,

You can use the outputMetadata to return information about the scene that you are requesting/downloading. In the documentation there are links to examples on how to implement the function.

Maxim

I have tried that and I get the following response:

{"metadata":"[{"idx":0,"bandBuffers":[{},{},{},{},{}]}]"}

However, previously I used to get the date here when using the same script for Sentinel 2. Here is the evalscript for that:

eval_script_rgb_json = """

//VERSION=3









let minVal = 0.0;

let maxVal = 0.4;

let viz = new HighlightCompressVisualizer(minVal, maxVal);

function evaluatePixel(samples) {

     let sudoPanW = (samples.B04 + samples.B03 + samples.B02 * 0.4) / 2.4;

     let ratioW = samples.B08 / sudoPanW;

     let val = [samples.B04 * ratioW, samples.B03 * ratioW, samples.B02 * ratioW];

     val = viz.processList(val);

     val.push(samples.dataMask); 

     return val;

}

function setup() {

     return {

          input: [{

               bands: ["B02","B03","B04","B08","dataMask" ]

          }], 

          output: { 

               bands: 4

          }

     }

}





function updateOutputMetadata(scenes, inputMetadata, outputMetadata) {

  outputMetadata.userData = { "metadata":  JSON.stringify(scenes) }

  return [0]

}



"""