[ncl-talk] CNL read CALIPSO v4.51 data

[Ehsan Taghizadeh]

Hi Zhifeng,
Could you please add the following commands before your addfile command:
exists = isfilepresent("CAL_LID_L2_VFM-Standard-V4-51.2017-08-21T14-00-11ZD.hdf")print (exists)
I wonder if your ncl script and the file are in the same place.In case it returns True, could you please add the following commands just after reading your file (after addfile command):
names = getfilevarnames( "CAL_LID_L2_VFM-Standard-V4-51.2017-08-21T14-00-11ZD.hdf")print (names)
----------------------------------------------------------------------------- Best regards,Ehsan Taghizadeh 

    On Thursday, September 4, 2025 at 01:37:05 PM PDT, Zhifeng Yang via ncl-talk <ncl-talk at mailman.ucar.edu> wrote:  
 
 Hi all, 
I am using NCL 6.6.2 to read CALIPSO latitude, longitude, and Feature_Classification_Flags variable from CAL_LID_L2_VFM-Standard-V4-51. 
  fh = addfile("CAL_LID_L2_VFM-Standard-V4-51.2017-08-21T14-00-11ZD.hdf","r")   lath      = fh->Latitude(:, 0)
   lonh      = fh->Longitude(:, 0)
   vfmh      = fh->Feature_Classification_Flags
However, I got the error belowfatal:HDF: An error occurred while attempting to read variable (Feature_Classification_Flags) from file (/glade/derecho/scratch/zhifengy/data/experiment_input/doe_cloud_africa/CALIPSO/CAL_LID_L2_VFM-Standard-V4-51/test/CAL_LID_L2_VFM-Standard-V4-51.2017-08-21T14-00-11ZD.hdf)
Do you have any idea about this? Thanks,
Best,Zhifeng
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