TOPS Merge

[Anton_Gorshkov]

Hello. When connecting IW1 and IW2 at a phase unwrapping, it gives an error, whoever tried to connect IW1 and IW2 and then make a phase unwrapping?

[ABraun]

what does the error say?

[Anton_Gorshkov]

when I start the unwrapped phase in Cygwin, I get an error “27 parameters input from file snaphu.conf (84 lines total)
extra data in file Phase_ifg_srp_IW1_VV_09May2015_05Nov2015.snaphu.img (bad linelength?)”

[ABraun]

So it is the same as here?

Error unwrapped phase

Hello! I process two images to build a displacement map. For the merger of IW2 and IW3, I erased the TOPS Merge function, but when I start the unwrapped phase in Cygwin, I get an error “27 parameters input from file snaphu.conf (84 lines total) extra data in file Phase_ifg_srp_IW1_VV_09May2015_05Nov2015.snaphu.img (bad linelength?)” Why? Is this error related to the Merge function?

One solution was proposed here

Snaphu Export

SRP (Subtract Reference Phase) is after producing the interferogram and you have subtracted the phase Earth phase. SRD (Subtract Reference DEM) is after topographic phase removal. The band dimensions should be the same either way. I think the bad linelength error may be related to passing snaphu a wrong dimension. Double check that the snaphu command in teh snaphu.conf file corresponds to this product and the dimensions are the same as the band.

Does the snaphu command really address the correct file?

[Anton_Gorshkov]

I looked at the file like it’s correct. Have you tried merge subswaths and then doing a unwrapping phase?

[ABraun]

not yet.
Maybe you can make a subset of your merged product (just leave a couple of pixels at the edges so no NoData values remain) and export again.

[Anton_Gorshkov]

You mean cut the edges of the combined image, and then export?

[ABraun]

yes, could be worth a try.

[Anton_Gorshkov]

Thanks, I’ll try.