config/request_scripts/sentinel1_evalscript.js

function setup() {
    return {
        input: ["VV", "VH"],
        output: {
            bands: 2,
            id: "s1_vv"
        }
    };
}

function evaluatePixel(sample) {
    return {
        s1_vv: [sample.VV,
                sample.VH]
            };
}