Re: [netcdfgroup] Problem to use NetCDF OpenDap

The more recent opendap hdf5 handler replaces forward slash by underscore so it 
becomes more legit netcdf variable names.  I'll do a test to see if it does so 
for OMI L2 data.  Otherwise it should be easy to change it in NcML .

-Fan
________________________________________
From: Lynnes, Christopher S. (GSFC-6102)
Sent: Tuesday, March 20, 2012 6:35 PM
To: Dennis Heimbigner
Cc: netcdfgroup@xxxxxxxxxxxxxxxx; Fang, Fan (GSFC-610.2)[ADNET SYSTEMS INC]
Subject: Re: [netcdfgroup] Problem to use NetCDF OpenDap

On Mar 20, 2012, at 7:05 PM, Dennis Heimbigner wrote:

> Wei-
> the fundamental problem is that the forward
> slash character '/' is not legal in DAP version 2
> names.

Hmmm…we'll take a look at it and see if we can do something with the NCML 
handler in our OPeNDAP server to replace the slashes…

>
> Wei Huang wrote:
>> Hi, There,
>>
>> We try to use NetCDF OpenDap to access dataset:
>> http://aurapar2u.ecs.nasa.gov/opendap/Aura_OMI_Level2/OMHCHO.003/2008/001/OMI-Aura_L2-OMHCHO_2008m0101t0028-o18418_v003-2008m0704t132227.he5
>> We can only get 3 variables:
>>
>>   file global attributes:
>>      title : NASA HDFEOS5 Swath
>>      Conventions : CF-1.4
>>   dimensions:
>>      nTimes = 1644
>>      nXtrack = 60
>>   variables:
>>      float lat ( nTimes, nXtrack )
>>         _FillValue :   -1e+30
>>         title :        Geodetic Latitude
>>         UniqueFieldDefinition :        Aura-Shared
>>         add_offset :      0
>>         scale_factor :    1
>>         missing_value :        -1e+30
>>         valid_range :  ( -90, 90 )
>>         coordinates :  lat lon
>>         units :        degrees_north
>>         standard_name :        latitude
>>
>>      float lon ( nTimes, nXtrack )
>>         _FillValue :   -1e+30
>>         title :        Geodetic Longitude
>>         UniqueFieldDefinition :        Aura-Shared
>>         add_offset :      0
>>         scale_factor :    1
>>         missing_value :        -1e+30
>>         valid_range :  ( -180, 180 )
>>         coordinates :  lat lon
>>         units :        degrees_east
>>         standard_name :        longitude
>>
>>      double time ( nTimes )
>>         _FillValue :   -1e+30
>>         title :        Time in TAI units
>>         units :        s
>>         UniqueFieldDefinition :        Aura-Shared
>>         add_offset :      0
>>         scale_factor :    1
>>         missing_value :        -1e+30
>>         valid_range :  (    0, 10000000000 )
>>
>>
>>
>> By check:
>>
>> http://aurapar2u.ecs.nasa.gov/opendap/Aura_OMI_Level2/OMHCHO.003/2008/001/OMI-Aura_L2-OMHCHO_2008m0101t0028-o18418_v003-2008m0704t132227.he5.html
>>
>> We can see there are a bunch of variables.
>>
>> If we download the dataset, we can see there are more than 3 variables
>> as well.
>>
>> Anyone has experience on this?
>>
>> Thanks,
>>
>> Wei
>>
>> huangwei@xxxxxxxx <mailto:huangwei@xxxxxxxx>
>> VETS/CISL
>> National Center for Atmospheric Research
>> P.O. Box 3000 (1850 Table Mesa Dr.)
>> Boulder, CO 80307-3000 USA
>> (303) 497-8924
>>
>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------
>>
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>
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--
Dr. Christopher Lynnes, NASA/GSFC, Code 610.2, 301-614-5185



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