Conversion from Sentinel-1A SLC to GRD

[GEOMM]

Could some one explain in details the workflow of converting the Sentinel-1A SLC to GRD.

[falahfakhri]

The GRD is already available, you don’t need to convert anything,

Also many posts were already mentioned regarding this issue,

Please take a look at this post

SLC to GRD with phases

SLC to GRD is just a graph so it’s made up of the operators that make up that graph. Therefore, those operators will still have the same input parameters they always have. In the case of the SLC to GRD graph, it will not make sense to output complex from the multilook operator.

And this one

SLC to GRD with phases

Hi, When converting SLC product into GRD, phase is not retained. If you want to perform interferometry, you should use SLC format. GRD data has been multi-looked and projected to ground range using an Earth ellipsoid model. Pixel values represent the intensity but phase information is lost. You can use GRD data if you are interested in using only the intensity values (e.g perform classification), on the other hand, you can use the phase information if you are interested in doing a subsidence …

To get understood the difference between SLC and GRF

[eeeassa]

I want to compare two SAR images of a same place with in a short period (better in minutes).

However, the GRD products have a temporal reosulotion of 12 days for a same scanning ‘box’!
But for SLC products, although they are also 12-days, but two successive scanning boxes (time interval just minutes) in one orbit are overlapping.

My interest region just in the overlapping area! So I want to use SLC product

[mengdahl]

So are you saying that your AOI is in the burst overlap area? Then the time interval should be some seconds (the radar is imaging the other two subswaths first, before adding the next burst in the same subswath)