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Dear all,


since a few weeks we configured a Sentinel-1 GRD visualization of the VH polarization as a Sentinel-Hub layer. The script looks like following:


let viz = new ColorMapVisualizer([

  [0, 0x00204D],

  [0.1, 0x575C6D],

  [0.3, 0xA69D75],

  [0.5, 0xFFEA46]

]);



function evaluatePixel(samples) {

	let vh = Math.max(0, Math.log(samples[0].VH) * 0.21714724095 +1);  

	return viz.process(vh);

}



function setup(ds) {

    setInputComponents([ds.VH]);

    setOutputComponentCount(3);

}

Since yesterday (2019-08-19) around noon the result image looks completely different when we request the layer from Sentinel-Hub. See the following image, how the visualization was before and after:
S1_VH_after


We have not changed the script or the configuration. Are there some changes in the API oder Sentinel-1 GRD data?


Thanks for help!

Ok, I have checked our layer a few seconds ago and now the visualization is correct again.

Very strange, I have no explanation for that.

As I said before, we have no changed the script or configuration.

There was a regression with one of the last software updates, which we have corrected.

We also improved our processes to avoid such issues in the future.


I apologize for inconvenience.

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