I'm not sure if this issue has been brought to your attention yet (I've checked through the recent archives but I haven't seen anything mentioning it) but OPeNDAP is not working anymore. I have tried two tools in Data Products (AVISO and NOAA OSCAR) and I have gotten the same error message that the URL is not opening. When I search for the URL (http://dapper.pmel.noaa.gov/dapper/oscar/world_sfc-third.nc) referenced in the error message, there is a note stating that "Due to severe resource reductions, the DChart and Dapper data access web pages and OpenDAP data services (dapper.pmel.noaa.gov/dapper and dapper.pmel.noaa.gov/dChart) are no longer available".