SLC- removes lines between adjacent sub-swath

Microwave Toolbox Polarimetry
#1

Hello
I am a novice trying Sentinel-1 SLC. There is a distinct line between adjacent subbands, and the range direction data appears to fluctuate (As shown in picture). How can I remove this stripe to produce a smooth image, Please help me!!
thank you
d3157a114b3f40e338846d39915dedf

dfe9fff381614db62c4bd75bc7d8d94
dfe9fff381614db62c4bd75bc7d8d94.jpg1080×1920 174 KB
fde449952273b55bf6a33bdbd5506e1
fde449952273b55bf6a33bdbd5506e1.jpg1044×1856 285 KB

Tops Merge gives value jumps
#2

Please apply TOPSAR-Merge operator in order to merging subswaths (IWs) that belong to the same TOPSAR image,

#3

Thanks reply, the TOPSAR-Merge is after calibration and before deburst?

#4

Thanks reply, the TOPSAR-Merge is after calibration and before deburst?

#5

What exactly do you intend to do?

If you intend to process the whole image three su-bswath at once, the merge should be the first process, but in simplest way,

Apply, TOSAR - split —> Apply Orbit—>merge

first one is to split each sub-swath and the second one is to apply orbit, and then to merge the all three sub-swath, also it is possible to include debursts after apply orbit, but it depends on the goal of the process.

#6

thank you~

#7

Topsar Merge will not correct this. This the thermal noise from the sensor. The ThermalNoiseRemoval operator can be applied before calibration to remove this between subswaths. However, the noise vectors provided in the product will do a good job of removing this over land but you will still notice it over the ocean.

1 Like
#8

Thank you very much for your detailed reply. Do you mean that this situation is normal and inevitable in the ocean?

#9

I found this article now explains exactly @lveci solution, of the Efficient Thermal Noise Removal for Sentinel-1TOPSAR Cross-Polarization Channel as reference,

Source: https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=8126233

#10

thank you very much