I dont know how to retrieve water level from sentinel 3A’s SRAL altimetry data. I’m currently using the level-2 LAN product. Tried a few formulae cominations in python, nothing worked out good. Wondering if i can do this possibly in SNAP toolbox.
Any help would be greatly appreciated. Thanks
I would suggest to take a look at BRAT.
http://www.altimetry.info/
It is the altimetry toolbox from ESA & CNES.
Thanks for replying sir.
Yes sir, I’ve installed BRAT too. And i can see the quick processing options that are available. But sir, can you please guide me how to calculate water level for an inland water body applying all corrections using BRAT.
I’m just getting it messed up around many formulas and I’m not sure which is the right one.
If possible, I can also send you the python code i’ve written to read and process the .nc file of SRAL __LAN product.
Thanks, so much, sir.
I never used BRAT so I can’t help you with it.
But they have there own forum. You will probably get the best help there.
hi,
You can use :https://github.com/GenericAltimetryTools/altimeter_read
This is a open source software that under development. The functions to calculate the water level over lakes is finished.
Lei
Hi Marco,
I am trying to download BRAT using link that you provided. However, that link is not working. Do you know any alternative link from where I can download BRAT? Also, you mentioned about BRAT forum but I could not find any where I can post my question.
Thanks for your help!
Abhi
It seems that the links are not working right now
https://sentinels.copernicus.eu/web/sentinel/-/brat/1.0
Maybe you could ask to esa helpdesk.
Sorry, I have no other source.
Maybe the page is only temporarily down and will be back online soon. I don’t know.
You can ask the help desk as @abruescas suggested or you mail directly to EOSupport@Copernicus.esa.int.
Thanks Marco!
I will contact the helpdesk as @abruescas suggested and also email directly.
I am also using Sentinel-3 SRAL in BRAT for inland water body monitoring. The azimuth resolution is said to be 300 m but the output in BRAT has a resolution of 38 km, why is it so?
As said earlier in this thread. It is better to ask the guys from BRAT directly.
HelpDesk – Radar Altimetry Tutorial and Toolbox
Hello everybody. Does anyone here has downloaded recently the BRAT toolbox from altimetry.info? It does not seems to work anymore. Does anyone know if the toolbox has been relocated somewhere else? Thank you very much in advance
@Amalia-Castro-Gomez Can you check with the BRAT team why the webpage is not working anymore?
Thanks
Hi everyone, yes the team says they had some technical difficulties with the website, that required to take it offline. Until the website can be brought online again, the toolbox can be downloaded from ESABox. The password is A|t1m3try
We will keep you updated.
Excuse me, sir, the elevation from Sentinel-3 for the inland water provided on some websites is corrected? (I mean, there is no need to make geophysical corrections?)
Thank you in advance.
Are you asking of the data is orthorectified? For OLCI and SLSTR data they are, if you use the pixel based geo-coding in SNAP (that’s the default). If you use the tie-points the data is not orthorectified.
For the altimetry data I don’t know the answer You might ask here: Radar Altimetry Tutorial and Toolbox.
Actually, I mean the Altimetry data, Thank you so much, sir, for your help.
Excuse me Sir I couldn’t find anyone to ask at this link, 
I apologize for disturbing you.
Can you provide me with a video or any guidebook about how to use these, please?
Thanks in advance
You can find some short courses here:
https://training.eumetsat.int/course/view.php?id=445
https://training.eumetsat.int/mod/page/view.php?id=13795