Can SAR Mosaic Wizard process ENVISAT Precision Image(ASAR_IMP_1P) products? I used this tool but it failed to produce the desired mosaicing results

Microwave Toolbox
#1

I tried to mosaic two ENVISAT Precision Image products acquired at the same date, but I cannot see anything from the results by the SAR Mosaic Wizard in the Radar of SNAP.
Is there Anyone can give some help?
Thanks in advance!

#2

how do the image statistics look like? Are there any values?