GDS Datasets in Ferret

["Jennifer M. Adams" <jma@xxxxxxxxxxxxx>]

Dear Ferret Experts, 

I am testing some GDS server-side analysis requests that are
really long ... so long that I think they may exceed the
maximum allowable length in Ferret. I am using v5.51 for OSF
4.0. 

The following doesn't work (my email program will wrap the
lines, but this should all be one long stringy URL): 

yes? use
"http://dataportal.ucar.edu:9191/dods/_expr_{C20C/C20C_A,C20C/C20C_B,C20C/C20C_C,C20C/C20C_D,C20C/C20C_E,C20C/C20C_F,C20C/C20C_G,C20C/C20C_H}{ave((slp.1+slp.2+slp.3+slp.4+slp.5+slp.6+slp.7+slp.8)/8.0,t+0,t=601,12)}{0:358.125,-30:30,1000:1000,00z01jan1949:00z01dec1949}"

But this does: 

yes? use
"http://dataportal.ucar.edu:9191/dods/_expr_{C20C/C20C_A,C20C/C20C_B,C20C/C20C_C,C20C/C20C_D,C20C/C20C_E,C20C/C20C_F,C20C/C20C_G}{ave((slp.1+slp.2+slp.3+slp.4+slp.5+slp.6+slp.7)/7.0,t+0,t=601,12)}{0:358.125,-30:30,1000:1000,00z01jan1949:00z01dec1949}"


Second Question: 

Once I do successfully open a GDS server-side analysis
request, there is a shorthand name for the data set that is
something like "_exprcache_104992113430013". The shorthand
name is useful if you want to include the results of your
first server-side analysis request in yet another
server-side analysis request. This shorthand name is
included in the output of 'query file' (a GrADS command
similar to "show data"), but I don't know how to retrieve it
with Ferret. "show data" gives me this (once again, sorry
about the unsightly line wrapping): 

     currently SET data sets:
    1>

http://dataportal.ucar.edu:9191/dods/_expr_{C20C/C20C_A,C20C/C20C_B,C20C/C20C_C,C20C/C20C_D,C20C/C20C_E,C20C/C20C_F,C20C/C20C_G}{ave((slp.1+slp.2+slp.3+slp.4+slp.5+slp.6+slp.7)/7.0,t+0,t=601,12)}{0:358.125,-30:30,1000:1000,00z01jan1949:00z01dec1949}
(default)
 name    title                 I      J     K    L
 RESULT  result of expression  1:192  1:34  ...  1:12
 

I'm not exactly sure how GrADS knows the shorthand name, but
I'm assuming it's part of the metadata that comes back from
the GDS. Is there any way to recover the shorthand name with
Ferret? 

Thanks,
Jennifer
-- 
----------------------------------------
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Road, Suite 302
Calverton, MD 20705-3106
Phone: (301)902-1278 or (301)595-7000
Fax:   (301)595-9793
Email: jma@cola.iges.org