NOAA/ESRL/PSD Catalog http://esrl.noaa.gov/psd/thredds/catalog/Datasets/gpcc/first_guess/catalog.html

Dataset Size Last Modified
     Folder  first_guess   --
         precip.first.mon.total.1x1.nc 3.374 Mbytes 2013-05-20T21:17:13Z

NOAA/ESRL/PSD at NOAA ESRL PSD see Info
THREDDS Data Server [Version 4.3.15 - 20121218.1126] Documentation