Maybe they just resample the image to a higher resolution using interpolation. It will not add addittional information but it may make the image easier to anal

Maybe they just resample the image to a higher resolution using interpolation. It will not add addittional information but it may make the image easier to analyse and understand. Sometimes an interpolated image will have less error from the actual phenomena than the low resolution version (in the same way that a compressed mp3 is a better reproduction than an uncompressed version of a similar file size).