Error running "run_04_refineSecondaryTiming" for ALOS1 stack.

[Dani-Lindsay]

Hi there,

I am using stackStripMap.py to generate a ALOS-1 stack and am having trouble running "run_04_refineSecondaryTiming" with stripmapWrapper.py -c /global/scratch/users/daniellelindsay/CC_ALOS1/proc/201A/configs/config_refineSecondaryTiming_20060905_20061206.

I keep getting the error below...

2021-11-05 14:02:34,297 - isceobj.Location.OffsetField - INFO - 0 offsets culled
Error. Trying to allocate zero size array
Traceback (most recent call last):
  File "/global/home/users/daniellelindsay/.conda/envs/isce2_3.8/share/isce2/stripmapStack/stripmapWrapper.py", line 155, in <module>
    main(args.start,args.end)
  File "/global/home/users/daniellelindsay/.conda/envs/isce2_3.8/share/isce2/stripmapStack/stripmapWrapper.py", line 146, in main
    cfgParser.runCmd()
  File "/global/home/users/daniellelindsay/.conda/envs/isce2_3.8/share/isce2/stripmapStack/stripmapWrapper.py", line 51, in runCmd
    func_modules.main(self.funcParams[section])
  File "/global/home/users/daniellelindsay/.conda/envs/isce2_3.8/share/isce2/stripmapStack/refineSecondaryTiming.py", line 221, in main
    shifts, cull = fitOffsets(field,azazOrder=inps.azazorder,
  File "/global/home/users/daniellelindsay/.conda/envs/isce2_3.8/share/isce2/stripmapStack/refineSecondaryTiming.py", line 149, in fitOffsets
    objOff.offoutliers()
  File "/global/home/users/daniellelindsay/.conda/envs/isce2_3.8/lib/python3.8/site-packages/isce/components/isceobj/Util/Offoutliers.py", line 87, in offoutliers
    self.allocateArrays()
  File
"/global/home/users/daniellelindsay/.conda/envs/isce2_3.8/lib/python3.8/site-packages/isce/components/isceobj/Util/Offoutliers.py", line 191, in allocateArrays
    raise Exception
Exception

I am running the jobs using GNU parallel on an hpc system, however if I also just try running each line individually (adding #!/bin/bash at the top of the cmd file and make executable) I get the same error.

parallel < run_files/run_04_refineSecondaryTiming &> logs/run_04.log

If anyone has suggestions for input parameters or something I could try to fix this I would be very appreciative.

Attached are my log files.
run_01.log
run_02.log
run_03.log
run_04.log
run_05.log
run_06.log
run_07.log
run_08.log

[fdelgadodelapuente]

Hi Danielle,

2021-11-05 14:02:34,297 - isceobj.Location.OffsetField - INFO - 0 offsets culled

It seems like ISCE cannot cull the offset field and that results in a set of cascading errors. I recall from the old ROI_PAC days that errors like that showed up when the SLCs were off by several thousands of pixels and ampcor couldn't find an offset field. Maybe you can check with mdx how misaligned are the SLCS after the geometric corregistration with geo2rdr.

I see that your SLCs are from 2006. For the 99% of the cases the ALOS SLCs started to be acquired in early 2007 and those 2006 are mostly experimental. Hence you can try to run the ampcor for the rest of the post 2007 SLCs and check whether the error shows up or not.

Francisco