Comb-like pattern in S1 TOPS VH polarization

[Akshay]

Image ID: S1B_IW_SLC__1SDV_20200313T095220_20200313T095239_020672_0272FA_95E8
I am observing a comb-like pattern in VH polarization only in the image above. See the screenshot attached. The screenshot shows the after thermal noise correction (left) and before thermal noise correction (right), and the image is the RGB composite (VV, VH, No data).

For reference, sharing the GRD image of VV and VH of the same scene. Does anyone have the explanation- what it is? scalloping, azimuth antenna pattern, radio interference from ground objects
VH

VV

VH - There are three such comb-like artifacts in the image

[mikhelif]

Looks like some Radio Frequency Interference (RFI) there is probably a ground based radar or some other system operating in the same frequency in that area.

[Akshay]

Thanks! That can be one possibility. I am wondering why it is only visible in VH polarization. The explanation of noise floor makes sense but there should be some artifacts visible in VV as well (can be smoother or less evident, but it should be visible).