Use of SNAP for sentinel 1A

mdelgado · February 2, 2020, 4:24pm

You can request them to be online one at a time (with a single user).
Alternatives are Alaska facilites of NASA, they work with Amazon and normally are not offline.

It happened to me this week to get data from NASA as from scihub takes an non-specific amount of time to get data online, without the chance to get any notification.

So options are:
ALASKA Facilities: https://search.asf.alaska.edu/#/
PEP-CNES:https://peps.cnes.fr/
SciHub : https://scihub.copernicus.eu
DIAS (creodias, sobloo, mundi, onda)

each of them with their pro and cons.
I hope this helps
Make your choice!

mfitrzyk · February 3, 2020, 1:54pm

as mentioned by @mdelgado Alaska Facility has all the data online - its also very easy to search for the same frame in certain period and with certain time span - in your case 2017-2018 every month

hasini · February 18, 2020, 8:54am

Thk you for the response

could you clarify the following

while applying orbit file to the S-1A GRDH of IW image
an error has occurred saying “No valid orbit file”
kindly let me know how to sort it out
when constructing graph for apply orbit file , thermal noise removal and calibration it is giving an error saying " i node error sequential.ac error"
clarification is needed in this

thk u

hasini · February 18, 2020, 9:02am

sir,
kindly clarify the following error

ABraun · February 18, 2020, 9:07am

if your product was acquired within the last two weeks, no precise orbit files are ready to download yet. Is this the case?

navv37 · August 30, 2020, 7:39am

Hello ALL,
How could we calculate the RCS for a Radarsat 2 data??
Thanks in Advance

ABraun · August 30, 2020, 9:15am

as it is not supported in SNAP, you can use ASF MapReady to calibrate the data

navv37 · August 30, 2020, 9:17am

Thank you Sir, Is there any alternate method. Like doing it manually.

ABraun · August 30, 2020, 9:21am

please check chapter 7 of this document

ericloewe · August 31, 2020, 9:17pm

To clarify: You mean that calibration is currently broken in the latest version of the toolbox, not that it’s generically unsupported for RADARSAT-2, correct?

I have to admit I never actually validated the results myself, but the toolbox was previously capable of supposedly calibrating typical RADARSAT-2 products

ABraun · September 1, 2020, 6:01am

actually, I thought that R2 was not supported at all so far.
@lveci could you please clarify?