opendap returns "NetCDF: file not found", when requesting full file

[ocehugo]

Hi,

I'm trying to get some files from the following server:

http://thredds0.nci.org.au/thredds/dodsC/u83/modis/oc.mosaics.70/2011/10/29/A20111029.70.austocean.20130813192425.chl_oc3.nc4

But nco return me an error of the type:

nco_err_exit(): ERROR Short NCO-generated message (usually name of function that triggered error): nco_get_vara()
nco_err_exit(): ERROR Error code is -90. Translation into English with nc_strerror(-90) is "NetCDF: file not found"
nco_err_exit(): ERROR NCO will now exit with system call exit(EXIT_FAILURE)

I can grab the latitude and longitude variables from the file (and strides of it), but when requesting the chl variable, ncks failed miserably. I think this is related to netcdf groups, since the headers are the following:

Dataset {
Grid {
ARRAY:
Float32 chl_oc3[time = 1][latitude = 8001][longitude = 11001];
MAPS:
Float64 time[time = 1];
Float64 latitude[latitude = 8001];
Float64 longitude[longitude = 11001];
} chl_oc3;
Float64 time[time = 1];
Float64 longitude[longitude = 11001];
Float64 latitude[latitude = 8001];
} u83/modis/oc.mosaics.70/2011/10/29/A20111029.70.austocean.20130813192425.chl_oc3.nc4;

Cheers

[Charlie Zender]

Hello ocehugo,
This message slipped from my attention while traveling.
Sorry for the late response.
I am unable to reproduce the problem you describe.
Retrieval of chl_oc3 works for me.
Suggestion is to be sure you're using latest NCO.
If problems persist, send exact commands, versions, etc.
cz

zender@givre:~$ ncks --cdl -v chl_oc3,latitude,longitude -d latitude,0 -d longitude,0 http://thredds0.nci.org.au/thredds/dodsC/u83/modis/oc.mosaics.70/2011/10/29/A20111029.70.austocean.20130813192425.chl_oc3.nc4
netcdf A20111029.70.austocean.20130813192425.chl_oc3 {
dimensions:
latitude = 1 ;
longitude = 1 ;
time = 1 ;

variables:
float chl_oc3(time,latitude,longitude) ;
chl_oc3:_Netcdf4Dimid = 0 ;
chl_oc3:_FillValue = -999.f ;
chl_oc3:long_name = "Chlorophyll Concentration, OC3 Algorithm" ;
chl_oc3:units = "mg/m^3" ;

double latitude(latitude) ;
  latitude:_Netcdf4Dimid = 1 ;
  latitude:units = "degrees_north" ;
  latitude:long_name = "latitude" ;
  latitude:standard_name = "latitude" ;

double longitude(longitude) ;
  longitude:_Netcdf4Dimid = 2 ;
  longitude:units = "degrees_east" ;
  longitude:long_name = "longitude" ;
  longitude:standard_name = "longitude" ;

double time(time) ;
  time:_Netcdf4Dimid = 0 ;
  time:units = "days since 1800-01-01 00:00:00.0" ;
  time:calendar = "gregorian" ;
  time:long_name = "time" ;
  time:standard_name = "time" ;

data:
chl_oc3 = _ ;

latitude = 10 ;

longitude = 70 ;

time = 77367 ;

} // group /
zender@givre:~$

[Navid Ghajarnia]

Hi charlie

Is this also possible to download MODIS HDF files using nco? or only the netCDF files are supported?

thanks

[Charlie Zender]

Yes HDF files will work fine so long as netCDF and NCO are built with the appropriate support.
http://nco.sf.net/nco.html#hdf4