Error running "run_04_refineSecondaryTiming" for ALOS1 stack.

[Dani-Lindsay]

Discussed in https://github.com/isce-framework/isce2/discussions/380

^{Originally posted by Dani-Lindsay November 5, 2021} 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

[piyushrpt]

Make sure that the images you are trying to create a stack that covers your AOI are from the same track. This error essentially means it found zero matches to tie the images. Either the scene being used is not from the same track or frame. Use mdx.py to look at the SLCs for those dates to make sure they look correct.

[Dani-Lindsay]

This was exactly the problem, thank you! I downloaded the data with ssara and forgot to visually inspect. Even though they have the same track and frame numbers there is one date which doesn't overlap with the others.

[zhuhaxixiong]

I also get the error when do run_04_refineSecondaryTiming of ALOS1 stack ,but my data wa cover the same region