Are there any tutorials or descriptions of processing IW SLC files into something like GRD images? Starting from one of the tiff files and trying to build a graph with them I get the error message “Input should be a SAR product.”

I can use the GRD images for what I want to do right now, but having the SLC information seems like it would potentially be of benefit to me. I know I’ve seen many comments here that people shouldn’t bother with starting with SLC, just go with GRD, etc., but are there actually fundamental issues I should be aware of to actually do something like this processing?


I’m not sure what you mean with “Starting from one of the tiff files”. Be careful that you are using the Sentinel-1 product as a whole by opening the manifest.xml or the whole zip file and not the individual tif files within the measurement folder.

For SLC to GRD-like product conversion there is the radar -> Sentinel-1 TOPS -> S1 SLC to GRD graph.

Oh my goodness, it’s been a few months, and I had totally forgotten to open the manifest file, NOT the tiffs. Thanks for the reminder! I will try again having done that properly!

OK, I was able to run the SLC to GRD graph, and make my own slight variations, etc. Is there a way in STEP to make the georeferencing information in the output file such that I can load it in to Google Earth and it will overlay properly?

Yes, run terrain correction first and then export it to KML

Google Earth can read and plot geotiffs, but with the output from the terrain correction it seems to go to the right location but says there is no image information? Can it actually plot the sar image?

Also, I can’t see how to export it as a kml/kmz? Any hints?

Thanks for all your help!

KML export is in File menu -> Export -> Other

Sorry I’m so slow, but when I look at File -> Export -> Other the only option not greyed out is Geo-Coding as ENVI GCP File?

I think it’s only enabled with you have a view opened. Open a band for
viewing and then go to that menu.

When I try the export to kmz, the resulting file crashes Google Earth when I try to load it.

It looks like the tif file that is output from the terrain correction step is missing lots of stuff in the header that would allow google earth to read it in and over plot it. Is there a way to modify this information in the processing?

I don’t think it’s missing any information but, it may be too big. Try
making a smaller subset and then exporting it.