Issues implementing data fusion in EO Browser

Question

I am trying to implement this custom script for flood mapping in EO Browser. I have added the datasets using the additional datasets button, and specified the required timelines, but I keep getting the error:

Dataset with id: 0 not found.

I have followed the instructions in this answer, yet the error persists.

Below is the code;

//VERSION=3 (auto-converted from 1)
// Date Definition
var beforeflood_date = "2019-03-11";
var duringflood_date = "2019-03-23"; // Flood in Northern Nigeria

// Selection of polarization
function setup() {
    return {
        input: [
            {
                bands: ["VV"],
            },
        ],
        output: {bands: 3},
        mosaicking: "ORBIT",
    };
}

function preProcessScenes(collections) {
    var allowedDates = [beforeflood_date, duringflood_date]; // set dates for before-and-during flood analysis
    collections.scenes.orbits = collections.scenes.orbits.filter(function(orbit) {
        var orbitDateFrom = orbit.dateFrom.split("T")[0];
        return allowedDates.includes(orbitDateFrom);
    });
    return collections;
}

// Flood mapping
function calcFM(sample) {
    var outvv = sample.VV;
    return [1.5 * outvv];
}

function dateformat(d) {
    var dd = d.getDate();
    var mm = d.getMonth() + 1;
    var yyyy = d.getFullYear();
    if (dd < 10) {
        dd = "0" + dd;
    }
    if (mm < 10) {
        mm = "0" + mm;
    }
    var isodate = yyyy + "-" + mm + "-" + dd;
    return isodate;
}

function evaluatePixel(samples, scenes) {
    var outbe = 0;
    var outdu = 0;
    // before-flood image
    outbe = calcFM(samples[1]);
    // during-flood image
    outdu = calcFM(samples[0]);
    return [outbe, outdu, outdu];
    // ************************************
    // mask creation
    // var dout = outbe - outdu;
    // return [dout > 0.05 ?  1 : 0]
    // ************************************
}

I have attached below screenshots of my timespan specification, and the datasets I selected. What could I be doing wrong?

Answer 1

For this script you do not need the Use additional datasets option.

Instead, specify the time range at the top using the Timespan button and pay attention that you only specify dates in the code which are actually available for your area of interest. You can see which dates are available in the calendar where you specify your timerange. All dates which have a gray background have data.

Here's an example that worked: https://sentinelshare.page.link/VJ91

And here's how the settings look like: