[gradsusr] Open GRIB Files over THREDDS Opendap Server

[William Daniel Scheftic]

Hi,

Can I open GRIB files over opendap servers.  I realize they are not 
netcdf files, so that's probably why sdfopen failed.  But how would I 
open the file I got the following error with?  I frequently use sdfopen 
for files over GDS servers with success.

ga-> sdfopen 
https://www.ncei.noaa.gov/thredds/dodsC/cfs_v2_anl_mm_pgb/2017/201712/pgblnl.gdas.201712.grib2
Scanning self-describing file: 
https://www.ncei.noaa.gov/thredds/dodsC/cfs_v2_anl_mm_pgb/2017/201712/pgblnl.gdas.201712.grib2
CURL Error: Couldn't connect to server
curl error details:
Error: nc_open failed to open file 
https://www.ncei.noaa.gov/thredds/dodsC/cfs_v2_anl_mm_pgb/2017/201712/pgblnl.gdas.201712.grib2
NetCDF: I/O failure
gadsdf: Couldn't ingest SDF metadata.
ga-> quit
GX Package Terminated