Unusually Low Mean Amplitude for One Sentinel-1 Acquisition Before StaMPS Processing

After running mt_prep_snap on 31 Sentinel-1 products acquired between 4 January 2024 and 29 December 2024, the calculated mean amplitude was approximately 70–80 for almost all acquisitions.

However, the acquisition from 17 December 2024 produced a much lower mean amplitude of approximately 39. This product is also the smallest file in the dataset, with a size of about 3.6 GB. The second-smallest product is approximately 3.9 GB, while the remaining products are larger than 4 GB, with some exceeding 7 GB.

What could explain the unusually low mean amplitude and smaller file size for this acquisition?

Can I continue with the StaMPS processing while keeping this product in the stack, or should I remove it beforehand to avoid negatively affecting the results?