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Seeking feedback on using 'Calibrate' tool

Hi,

I am using 'Calibrate' tool for relative radiometric normalization of my Landsat data for its intended use in Change Vector Analysis (CVA). I am using Landsat 7 ETM+ from year 2000 and Landsat 8 OLI of year 2019 to highlight change areas using CVA. Both images correspond to close anniversary date i.e. September.

In the 'Calibrate' tool, I have provided Landsat 7 ETM+ Band 1(Blue) as Input Image and corresponding Landsat 8 OLI Band 2 (Blue) as Reference Image.

However, I am not sure about Output Image. Whether output predicted band will be of the year 2000 or 2019?

I will be grateful for prompt response.

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