[ferret_users] Ferret to access ipcc opendap server

[David Wang <climater@xxxxxxxxx>]

Hi Ferreters,

I wonder if anyone has ever successfully accessed the opendap server for IPCC AR4 model output (http://esgcet.llnl.gov/dap/ipcc4) in FERRET. I tried, for instance in FERRET V6.1:

yes? use "http://username:passwd@xxxxxxxxxxxxxxx/cgi-bin/dap-cgi.py/ipcc4/20c3m/mri_cgcm2_3_2a/pcmdi.ipcc4.mri_cgcm2_3_2a.20c3m.run1.ocn.mo.xml"

but failed:

 **Internet Data error
               (OPeNDAP/netCDF Error code 1001)

While dncdump -h can correctly display the meta data of the above opendap URL. I wonder if this is because FERRET cannot deal with authorized opendap access. Those U.S. models require no authorization, and FERRET can access them, for example,

yse? use "http://esgcet.llnl.gov/cgi-bin/dap-cgi.py/ipcc4/20c3m/gfdl_cm2_0/pcmdi.ipcc4.gfdl_cm2_0.20c3m.run1.ocn.mo.xml"
yse? show data
     currently SET data sets:
    1> http://esgcet.llnl.gov/cgi-bin/dap-cgi.py/ipcc4/20c3m/gfdl_cm2_0/pcmdi.ipcc4.gfdl_cm2_0.20c3m.run1.ocn.mo.xml  (default)
 name     title                             I         J         K         L
 SO       Salinity                         1:360     1:200     1:50      1:1680
 THETAO   Potential Temperature            1:360     1:200     1:50      1:1680


I intended to save a regional subset of the model output (the global data are too huge), and thought FERRET would do.

Thank you,
David