I am working with a Sentinel 1 SLC IW image (VV+VH) and trying to calibrate the data in the SNAP toolbox. However, it keeps returning the error "cannot construct data buffer"
Does anyone have any idea why this might be happening?
[GIS] Calibration error for Sentinel 1 image in SNAP toolbox
errorradarremote sensingsentinel-1sentinel-snap
Related Solutions
if all of these pixels are of the same value you can edit the no-data value under preferences (right-click the corresponding raster) and save the dataset. The should subsequently no longer be included in the mosaic (red box). If the pixels are of different values you can specify a valid pixel expression to exclude a whole range of values from the mosaic (blue box).
I tried it myself and it seems to work.
The coherence is likely low over open water, so the filter interpolated or filtered heavily based on available data at the top and bottom of your interferogram. The best solution would be to create a mask based on coherence, and apply the mask to the unwrapped interferogram. It's possible that the unwrapper can also take a mask to prevent errors from this region from being propagated.
Best Answer
As mentioned the error is due to RAM but not the system RAM, the available RAM for SNAP. you can change the configuration in the snappy.ini file located in the snappy folder. and increase available RAM Change the line
java_max_mem: 4G
see: http://forum.step.esa.int/t/increase-snappy-memory-beginner/6269