sources = { 
    'ukmo-coupled': 'http://data.ncof.co.uk/thredds/dodsC/METOFFICE-GLO-AF-PHYS-DAILY',
    'usn-ncom': 'http://ecowatch.ncddc.noaa.gov/thredds/dodsC/ncom/ncom_sfc8_agg/NCOM_SFC_8_Aggregation_best.ncd',
    'usn-hycom': 'http://ecowatch.ncddc.noaa.gov/thredds/dodsC/hycom/hycom_sfc_agg/HYCOM_Surface_Aggregation_best.ncd',
    'GLBu0.08': 'http://tds.hycom.org/thredds/dodsC/GLBu0.08/',
    'GLBy0.08': 'http://tds.hycom.org/thredds/dodsC/GLBy0.08/',
    'GLBv0.08': 'http://tds.hycom.org/thredds/dodsC/GLBv0.08/'
}
