with the parameters reported in elog entry 1239 we did the scan and the map of the black sapphire sample from Shinkosha.

Since the absorption is about 80%, there is a heavy depletion, so the scan is not symmetric.

The calibrated map looks different from the screenshots. It is because the screenshot shows the AC signal only, while the calibrated map is proportional to  AC/DC, where DC is not constant because the probe is absorbed not uniformly.