Sentinel 1A IW mode SLC data: Horizontal striping problem in ascending pass data

Microwave Toolbox
#1

Aim: I want to take power ratio between two Sentinel images. For both the images, I selected IW3 swath. the steps that I followed are as follow:

  1. S1 TOPSAR co-registration ESD
  2. Deburst
  3. Multi-looking 8 by 2
    The intensity image that I got shows horizontal striping.

Capture.PNG571×859 296 KB

The final output (after step 3) has three bands. i,q and virtual band for intensity.
When I perform band math operation on i and q band to convert it into intensity/power (i^2+q^2), I am not getting the same result as the virtual band intensity.

The i and q band is shown below.

Capture2.PNG634×861 331 KB

The intensity band generated using band math operation is show below.

Capture3.PNG625×812 290 KB

My doubts are:
A. How to remove horizontal striping in Sentinel 1A IW SLC data.
B. Why I am not getting the same intensity band using band math operation

#2

regarding A: to remove the stripes runt TOPS Deburst.
regarding B: If you simply apply the radiometric > calibration you will get Sigma0 from i+q, which is a normalized intensity measure so you don’t need to do that yourself.

#3

I already applied the TOPS Deburst . Still the stripings are not removed.

#4

please show us screenshots of your problem so we can understand.

#5

in the screenshots that I have shared earlier, deburst is already applied. Screenshot 1

#6

that looks strange indeed but I’m afraid I have no idea where it comes from, sorry.

#7

If that is the ratio-image you are omitting some steps of your processing. You should apply orbits and detect (convert to intensity) before computing the ratio.

#8

Thank you. I will try that.

#9

You meaned the stripes still exist after deburst operation for both real and imaginary imagery？ I also found that situation in my processing procedures. Please E-mail me:wangxc@radi.ac.cn

#10

Yes, I faced this issues with few product. I couldn’t find any way to correct it.

#11

are the stripes already present after the multi-looking?

#12

Yes. The stripping is present after multilooking.

#13

sorry, I meant before the multi-looking.