Problem with exporting S1 SLC product to GAMMA file

I tried to export S1 SLC product to GAMMA product. But the GAMMA product is very strange. It is different from the original S1 SLC product. I do not know the reason. My steps are as follows:

step 1: To import Sentinel 1 product (i. e. SLC product here).
step 2: To export S1 SLC product as Gamma file (*.par).

However, the Gamma file is not correct after it is opened. It is as follow:

Anyone could help me about this?

I could imagine that you first need to Deburst the S1 image. The information about the three sub-swaths could get lost during the conversion to the Gamma format.