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Sentinel calibration file

Added by Alessandro Novellino almost 8 years ago

Dear users,
I have recently started working with GAMMA on Sentinel-1 IW SLC products and I have two questions:
- where I can find the calibration data within the S1 folder? At the moment I am skipping the radiometric calibration in the 'par_S1_SLC' step because I am not able to find it. In the tutorial it should be located in the folder annotation/calibration/calibration but actually I have never find it!

- in case I am working with a big area whose extension exceeds some bursts and swaths limits, can I directly mosaic the full SLC scene with SLC_mosaic_S1_TOPS script and skip the concatenation of burst and swaths, namely the 'SLC_cat_S1_TOPS' and 'mutli_S1_TOPS' steps, respectively.

Thanks in advance!

Alessandro


Replies (5)

Sentinel calibration file - Added by Charles Werner almost 8 years ago

Hello,
The calibration data is part of the product in the annotation/calibration folder
The top level of the sentinel IW product contains the preview, annotation,
measurement, and support folders
The calibration folder is a sub-folder of the annotation folder.

You second question: You must concatenate the Sentinel bursts and swaths,
SLC_mosaic_S1_TOPS is a C program that mosaics the bursts into an SLC image with
non-overlapping bursts, but the burst boundaries are well defined.

Best regards,
Charles Werner

RE: Sentinel calibration file - Added by Alessandro Novellino almost 8 years ago

Ok, got it.

Thanks!

Alessandro

RE: Sentinel calibration file - Added by Alessandro Novellino almost 8 years ago

Dear Charles,
Just to be 100% sure of the steps I am following before doing coregistration:
In my case, where I am interested at the burst number 8 and 9 of the second swath, I have to:

- reading the parameters with 'S1_TOPS_preproc'.
- concatenate the consecutive bursts, namely number 8 and 9 of the second swath with 'SLC_cat_S1_TOPS'.
- Extract only those bursts with 'SLC_copy_S1_TOPS'

Then I can finally start coregistration!

Am I right?

Thanks in advance!

Alessandro

RE: Sentinel calibration file - Added by Julia Neelmeijer almost 8 years ago

Hi Alessandro,

I would do the following steps:

par_S1_SLC (or S1_TOPS_preproc if you wish)
SLC_copy_S1_TOPS
SLC_mosaic_S1_TOPS

To my understanding SLC_cat_S1_TOPS is rather used to concatenate two adjacent Sentinel-1 swathes.

Good luck,
Julia

RE: Sentinel calibration file - Added by Alessandro Novellino almost 8 years ago

Hi Julia,
Yes, I will follow your steps.

Many Thanks!

Alessandro

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