Error during the target product processing

[Raul_TYV]

Dear forum;
I am a begginer in sentinel toolbox. I downloaded this image:
S1B_IW_GRDH_1SDV_20170305T103823_20170305T103848_004572_007F86_4C55

Then, I wanted to apply the radiometric calibration: Radiometric/calibrate. However , I got the following error:
SNAP - Error
"A problem occurred during the target product processing.
Type:OperatorException
Message: Not able to write product file:
‘C:…\S1B_IW_GRDH_1SDV_20170305T103823_20170305T103848_004572_007F86_4C55_Cal.dim’ "

Even though I renamed the file (a shorter name), I got the same error.
Please Could you help me?

PD: I got the same error even if a change the image (for the same area e.g. S1B_IW_GRDH_1SDV_20170329T103823_20170329T103848_004922_0089AE_1AB7 )

[falahfakhri]

Which version of SNAP do you use?

What are the properties of your Machine? (RAM)

Take a look at this post explains , the calibration,

S1 radiometric correction

I did a few tests because I still wonder about the best pre-processing parameters for Sentinel-1. I therefore downloaded a Scene from 12.09.2016 which covers Cyprus (GRD and SLC). I chose this area due to its topographic complexity and the little vegetation cover. S1A_IW_GRDH_1SDV_20160912T035113_20160912T035136_013014_0149C4_6E2F S1A_IW_SLC__1SDV_20160912T035112_20160912T035136_013014_0149C4_CF51 I wanted to see the change in the result if different input data and modules are applied. These…

Also at this post

Correct SAR calibration steps

Hello Giacomo, The SAR processing -> radiometric -> calibrate process converts the pixel data to actual backscattering values. It should be performed first in whatever processing chain you do. If you need to do polarimetric work after with your data, you need to check the box marked «Save in complex» when calibrating. After this step, your image has backscattering intensity pixels and is in ground range or slant range geometry. The SAR processing -> Geometry -> Terrain correction -> Range Dopp…

[Raul_TYV]

Hello falahfakhri;
Thanks for your reply, I have the SNAP 6.0.0. , 16 GB of RAM. I solved the problem (memory issues with in my laptop) . However, I have more issues: after the radiometric calibration I applied the "speckle filtering/ single product speckle filter. I run the process with all the parameter by default.
There is not errors during the process but the final product has a zero histogram. I repeat the process several times but nothing changed.
To summarize:
S1B_IW_GRDH_1SDV_20170305T103823_20170305T103848_004572_007F86_4C55_Cal_Spk : I got the sigma null (nice results)
S1B_IW_GRDH_1SDV_20170329T103823_20170329T103848_004922_0089AE_1AB7_Cal_Spk_TC: after the speckle filter the results is bad, no histogram, zero values for sigma null.
Thanks for your help.

[falahfakhri]

I think this simple video helps you to understand your steps,

Perform Speckle- Filtering on a Sentinel-1 IW - GRDH image with SNAP.

Also have a look at this post,

Radiometric & Geometric Correction Workflow

The reason is this: Beta0, also called radar brightness, is the basic calibration of a SAR product. It makes use of an internal calibration constant stored in the metadata. You use it if you don’t have information on the incidence angle (red angle) of your image. The incidence angle is defined as the angle between the surface vertical of the earth (without terrain) and the incoming signal. [image] Sigma0, the normalized radar cross-section, is an advanced measure of calibration. It takes int…