I’d have three questions regarding InSAR image coregistration:
If I go to Radar > Coregistration > InSAR Optimized Coregistration, I can coregister a number of (say TSX) images with a single master. Is it also possible to add a new slave to an existing stack product? Or is it necessary to recoregister the whole stack from scratch?
If I coregister many pairs of Sentinel-1 images using the usual recommended steps, I end up with multiple stacks of two images (by the way, these stacks don’t have the “Master_bands” and “Slave_bands” metadata elements, as is the case for Stripmap). Is it possible to create a single stack product out of them?
In what situations is Radar > Coregistration > Automatic Coregistration meant to be used, as opposed to InSAR Optimized Coregistration?
Esteban, the InSAR optimized coregistration and Automatic coregistration
will eventually get merged. Currently you will need to use the Automatic
if you want a coregistered stack of GRDs.
It is possible to add a new slave to an existing stack by setting the
stack as the master product in the product set. However, it still needs
to write out a whole new stack product. We’re working on improving this.
I’ve been running some additional tests with TSX data using InSAR Optimized Coregistration. It works OK but I see these messages in the terminal:
Graph parameter includeMaster not found for Operator CreateStack
Graph parameter includeMaster not found for Operator CreateStack
Graph parameter computeOffset not found for Operator CoarseFine-Coregistration
I think the graph given in InSARCoregistrationGraph.xml is outdated.
Is there a way to merge multiple 2-image Sentinel-1 stacks too? If I create a stack product (using the Create Stack op) with multiple 2-image stacks as input, the master gets copied multiple times, and the output .dim indicates the master is also a slave.
Hello I would like to do a coregistration or stack for my GRD images (for Multi-Temporal speckle filtering) however when I do coregistration, some of the images are missing (there is no image if I open band) Some tips on what can be wrong?
yes, I’d say so. Coregistration is sensitive to looking direction so it is likely that images from different orbits fail to find sufficient matching GCPs
There are two operators to make a stack iage
Create Stack
Sentinel TOPS coregisteration
The create stack tool doesn’t provide the option to choose reference DEM
But I am confused which one to use? I have multiple terrain corrected input products of the same area and I would like to stack them altogether/
Then Create Stack could be sufficient when. they habe identical geometry, otherwise you can apply the standard Coregistration tool from the menu which accounts for small shifts between the images.
S1 TOPS Coregistration only works on initial products in slant geometry, so you cannot use it.