[ncl-talk] how to read a variable in group of hdf file?

[dyjbean at gmail.com]

hi,
  i want to read a variable "Time" which is involved in group  in a hdf file, a part of information of this hdf file is as follows:
+++++++++++++++++++++++++++++++++++++++++++
......
GROUP=GeoField 
OBJECT=GeoField_1 
GeoFieldName="Time" 
DataType=DFNT_FLOAT64 
DimList=("DataTrack_lo") 
END_OBJECT=GeoField_1 
OBJECT=GeoField_2 
GeoFieldName="Latitude" 
DataType=DFNT_FLOAT32 
DimList=("DataTrack_lo","DataXTrack_lo") 
END_OBJECT=GeoField_2 
OBJECT=GeoField_3 
GeoFieldName="Longitude" 
DataType=DFNT_FLOAT32 
DimList=("DataTrack_lo","DataXTrack_lo") 
END_OBJECT=GeoField_3 
END_GROUP=GeoField 
......
++++++++++++++++++++++++++++++++++++++++++++++++++

i want to extract the "Time" in ncl, but it showed:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 
ncl 0> ff=addfile("AMSR_E_L2A_201108010017_D.hdf","r") 
ncl 1> time=ff->Time 
fatal:["Execute.c":6321]:variable (Time) is not in file (ff) 
fatal:["Execute.c":8565]:Execute: Error occurred at or near line 1
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

it seems that there doesn't exist "Time" variable in this hdf file,but it does,

how can i read this time info in ncl?


thanks 

 


dyjbean at gmail.com
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