Sentinel 1 reversed data in Qgis

s1tbx Problem Reports
#1

Hello,
I am currently experiencing a problem with the Sentinel 1 data on a region that I am currently studying (Reunion Island), it is in the southern hemisphere and I can not re-project the data on SNAP. Could you help me?
I have already tried to change the type of capture (ascending/descending) but nothing helps. For information I try to obtain the data concerning the winds that cross the island in.shp to be able to exploit it on Qgis.
The reprojection on the RG92/UTM 40S - EPSG2975 does not work I have an error message that appears.
I can provide screenshots if needed.

Kind Regards,

#2

Which steps were applied tot he data so far? Actually, if you follow these steps and select the required coordinate reference system in Range Doppler Terrain Correction, it should work without additional reprojection. Proceedings | Free Full-Text | Sentinel-1 GRD Preprocessing Workflow

#3

I’m stuck at the first step “Apply Orbit File”
applied_orbit

Link to the data here

#4

You have downloaded a level 2 S1A_EW_OCN product which contains already processed information. SNAP requires Level-1 products as input for the radar tools:
https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-1-sar/product-types-processing-levels

#5

That’s what I was thinking, but I don’t know where I can reverse those datas,

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On Qgis, it didn’t feet, it seems reversed

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image903×812 128 KB

#6

They are not reversed, they were acquired in ascending orbit. How can Sentinel-1 images be un-flipped?
OCN products are not well supported in SNAP, but you can do some basic visualization: Issues related to Sentinel-1 OCN data

#7

So I won’t be able to use them in GIS software like Qgis ?
I just need corresponding data on this canva
image
Where both entities at the bottom are over those two Island is there any software who can handle that ?

#8

I’m not sure, sorry. Maybe someone else can answer.

#9

I often encounter this when importing data in R, but can “flip” the images using matrix manipulation. The QGIS community is much larger than the SNAP community, so posting in a QGIS forum may be more helpful. You should provide access to a small sample data set that illustrates the problem so people can duplicate the issue without investing a lot of their time.