HDF5 file, superblock version 2
group /
	attribute Conventions = "CF-1.5"
	attribute Metadata_Conventions = "Unidata Dataset Discovery v1.0"
	attribute acknowledgment = "Please acknowledge the use of these data with the following statement: These data were provided by GHRSST and the US National Oceanographic Data Center. This project was supported in part by a grant from the NOAA Climate Data Record (CDR) Program for satellites."
	attribute cdm_data_type = "grid"
	attribute cdr_id = "gov.noaa.ncdc:C00804"
	attribute cdr_program = "NOAA Climate Data Record Program for satellites, FY 2011."
	attribute cdr_variable = "sea_surface_temperature"
	attribute comment = "SST from AVHRR Pathfinder"
	attribute creator_email = "Kenneth.Casey@noaa.gov"
	attribute creator_name = "Kenneth S. Casey"
	attribute creator_url = "http://pathfinder.nodc.noaa.gov"
	attribute date_created = "20110920T084815Z"
	attribute day_or_night = "day"
	attribute easternmost_longitude = 180.0
	attribute file_quality_level = 3
	attribute gds_version_id = "2.0"
	attribute geospatial_lat_max = 90.0
	attribute geospatial_lat_min = -90.0
	attribute geospatial_lat_resolution = "0.0417"
	attribute geospatial_lat_units = "degrees north"
	attribute geospatial_lon_max = 180.0
	attribute geospatial_lon_min = -180.0
	attribute geospatial_lon_resolution = "0.0417"
	attribute geospatial_lon_units = "degrees east"
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute history = "smigen_both ifile=2004145.b4kd2-pf5ap-n17-sst.hdf ofile=2004145.i4kd2-pf5ap-n17-sst.hdf prod=sst datamin=-3.0 datamax=40.0 precision=I projection=RECT resolution=4km gap_fill=2 ; ./hdf2nc_PFV52_L3C.x -v ./Data_PFV52/PFV52_HDF/2004/2004145.i4kd2-pf5ap-n17-sst.hdf"
	attribute id = "AVHRR_Pathfinder-NODC-L3C-v5.2"
	attribute institution = "NODC"
	attribute keywords = "Oceans > Ocean Temperature > Sea Surface Temperature"
	attribute keywords_vocabulary = "NASA Global Change Master Directory (GCMD) Science Keywords"
	attribute license = "These data are available for use without restriction."
	attribute metadata_link = "http://pathfinder.nodc.noaa.gov/ISO-AVHRR_Pathfinder-NODC-L3C-v5.2.html"
	attribute naming_authority = "org.ghrsst"
	attribute necdf_version_id = "4.1.2"
	attribute northernmost_latitude = 90.0
	attribute orbit_node = "descending"
	attribute platform = "NOAA-17"
	attribute principal_year_day_for_collated_orbits = "2004145"
	attribute processing_level = "L3C"
	attribute product_version = "PFV5.2"
	attribute project = "Group for High Resolution Sea Surface Temperature"
	attribute publisher_email = "ghrsst-po@nceo.ac.uk"
	attribute publisher_name = "GHRSST Project Office"
	attribute publisher_url = "http://www.ghrsst.org"
	attribute references = "http://pathfinder.nodc.noaa.gov and Casey, K.S., T.B. Brandon, P. Cornillon, and R. Evans: The Past, Present and Future of the AVHRR Pathfinder SST Program, in Oceanography from Space: Revisited, eds. V. Barale, J.F.R. Gower, and L. Alberotanza, Springer, 2010. DOI: 10.1007/978-90-481-8681-5_16."
	attribute sensor = "AVHRR_GAC"
	attribute source = "AVHRR_GAC-CLASS-L1B-NOAA_17-v1"
	attribute southernmost_latitude = -90.0
	attribute spatial_resolution = "0.0417 degree"
	attribute standard_name_vocabulary = "NetCDF Climate and Forecast (CF) Metadata Convention"
	attribute start_time = "20040523T211433Z"
	attribute stop_time = "20040525T032019Z"
	attribute summary = "This netCDF-4 file contains sea surface temperature (SST) data produced as part of the AVHRR Pathfinder SST Project. These data were created using Version 5.2 of the Pathfinder algorithm and the file is nearly but not completely compliant with the GHRSST Data Specifications V2.0 (GDS2).  The file does not encode time according to the GDS2 specifications, and the sses_bias and sses_standard_deviation variables are empty.  Full compliance with GDS2 specifications will be achieved in the future Pathfinder Version 6. These data were created as a partnership between the University of Miami and the US NOAA/National Oceanographic Data Center (NODC)."
	attribute time_coverage_end = "20040525T032019Z"
	attribute time_coverage_start = "20040523T211433Z"
	attribute title = "AVHRR Pathfinder Version 5.2 L3-Collated (L3C) sea surface temperature"
	attribute uuid = "9A1119ED-9AFB-4594-851A-FB278942DF24"
	attribute westernmost_longitude = -180.0
dataset /aerosol_dynamic_indicator: int8, shape (1, 4320, 8640)
	attribute _FillValue = -128
	attribute add_offset = 1.1
	attribute comment = "Aerosol optical thickness (100 KM) data are taken from the CLASS AERO100 products, which are created from AVHRR channel 1 optical thickness retrievals from AVHRR global area coverage (GAC) data. The aerosol optical thickness measurements are interpolated from their original 1 degree x 1 degree resolution to the 4km Pathfinder Version 5.2 grid."
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "aerosol dynamic indicator"
	attribute reference = "http://www.class.ncdc.noaa.gov/saa/products/search?sub_id=0&datatype_family=AERO100&submit.x=25&submit.y=12"
	attribute scale_factor = 0.01
	attribute source = "CLASS_AERO100_AOT"
	attribute time_offset = 60.0
	attribute units = ""
	attribute valid_max = 127
	attribute valid_min = -127
dataset /dt_analysis: int8, shape (1, 4320, 8640)
	attribute _FillValue = -128
	attribute add_offset = 0.0
	attribute comment = "The difference between this SST and the previous day's SST."
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "Deviation from last SST analysis"
	attribute reference = "AVHRR_OI, with inland values populated from AVHRR_Pathfinder daily climatological SST. For more information on this reference field see http://accession.nodc.noaa.gov/0071180."
	attribute scale_factor = 0.1
	attribute units = "kelvin"
	attribute valid_max = 127
	attribute valid_min = -127
dataset /l2p_flags: int16, shape (1, 4320, 8640)
	attribute comment = "Bit zero (0) is always set to zero to indicate infrared data. Bit one (1) is set to zero for any pixel over water (ocean, lakes and rivers). Land pixels were determined by rasterizing the Global Self-consistent Hierarchical High-resolution Shoreline (GSHHS) Database from the NOAA National Geophysical Data Center. Any 4 km Pathfinder pixel whose area is 50% or more covered by land has bit one (1) set to 1. Bit two (2) is set to 1 when the sea_ice_fraction is 0.15 or greater. Bits three (3) and four (4) indicate lake and river pixels, respectively, and were determined by rasterizing the US World Wildlife Fund's Global Lakes and Wetlands Database. Any 4 km Pathfinder pixel whose area is 50% or more covered by lake has bit three (3) set to 1. Any 4 km Pathfinder pixel whose area is 50% or more covered by river has bit four (4) set to 1."
	attribute flag_masks = 1, 2, 4, 8, 16, 32, 64, 128, 256
	attribute flag_meanings = "microwave land ice lake river reserved_for_future_use unused_currently unused_currently unused_currently"
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "L2P flags"
dataset /lat: float32, shape (4320)
	attribute axis = "Y"
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute reference_datum = "geographical coordinates, WGS84 projection"
	attribute standard_name = "latitude"
	attribute units = "degrees_north"
	attribute valid_max = 90.0
	attribute valid_min = -90.0
// lat: first 89.9791794, last -89.9791641, count 4320
dataset /lon: float32, shape (8640)
	attribute axis = "X"
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute reference_datum = "geographical coordinates, WGS84 projection"
	attribute standard_name = "longitude"
	attribute units = "degrees_east"
	attribute valid_max = 180.0
	attribute valid_min = -180.0
// lon: first -179.979172, last 179.979172, count 8640
dataset /pathfinder_quality_level: int8, shape (1, 4320, 8640)
	attribute _FillValue = -1
	attribute comment = "This variable contains the native Pathfinder processing system quality levels, ranging from 0 to 7, where 0 is worst and 7 is best. And value -1 represents missing data."
	attribute flag_meanings = "bad_data worst_quality low_quality low_quality acceptable_quality acceptable_quality acceptable_quality best_quality"
	attribute flag_values = 0, 1, 2, 3, 4, 5, 6, 7
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "Pathfinder SST quality flag"
	attribute valid_max = 7
	attribute valid_min = 0
dataset /quality_level: int8, shape (1, 4320, 8640)
	attribute _FillValue = 0
	attribute comment = (text block)
| Note, the native Pathfinder processing system returns quality levels ranging from 0 to 7 (7 is best quality; -1 represents missing data) and has been converted to the extent possible into the six levels required by the GDS2 (ranging from 0 to 5, where 5 is best). Below is the conversion table:
|  GDS2 required quality_level 5  =  native Pathfinder quality level 7 == best_quality
|  GDS2 required quality_level 4  =  native Pathfinder quality level 4-6 == acceptable_quality
|  GDS2 required quality_level 3  =  native Pathfinder quality level 2-3 == low_quality
|  GDS2 required quality_level 2  =  native Pathfinder quality level 1 == worst_quality
|  GDS2 required quality_level 1  =  native Pathfinder quality level 0 = bad_data
|  GDS2 required quality_level 0  =  native Pathfinder quality level -1 = missing_data
|  The original Pathfinder quality level is recorded in the optional variable pathfinder_quality_level.
	attribute flag_meanings = "bad_data worst_quality low_quality acceptable_quality best_quality"
	attribute flag_values = 1, 2, 3, 4, 5
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "SST measurement quality"
	attribute valid_max = 5
	attribute valid_min = 1
dataset /sea_ice_fraction: int8, shape (1, 4320, 8640)
	attribute _FillValue = -128
	attribute add_offset = 0.0
	attribute comment = "Sea ice concentration data are taken from the EUMETSAT Ocean and Sea Ice Satellite Application Facility (OSISAF) Global Daily Sea Ice Concentration Reprocessing Data Set (http://accession.nodc.noaa.gov/0068294) when these data are available. The data are reprojected and interpolated from their original polar stereographic projection at 10km spatial resolution to the 4km Pathfinder Version 5.2 grid. When the OSISAF data are not available for both hemispheres on a given day, the sea ice concentration data are taken from the sea_ice_fraction variable found in the L4 GHRSST DailyOI SST product from NOAA/NCDC, and are interpolated from the 25km DailyOI grid to the 4km Pathfinder Version 5.2 grid."
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "sea ice fraction"
	attribute reference = "Global Sea Ice Concentration Reprocessing Product User Manual, Tonboe and Eastwood (editors), v1.1, February 2010."
	attribute scale_factor = 0.01
	attribute source = "Satellite Application Facility on Ocean and Sea Ice, European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT OSI SAF): ice_conc_nh_polstere-100_reproc_200405241200.nc, ice_conc_sh_polstere-100_reproc_200405241200.nc"
	attribute standard_name = "sea_ice_area_fraction"
	attribute time_offset = 12.0
	attribute units = ""
	attribute valid_max = 127
	attribute valid_min = -127
dataset /sea_surface_temperature: int16, shape (1, 4320, 8640)
	attribute _FillValue = -32768
	attribute add_offset = 273.15
	attribute comment = "Skin temperature of the ocean"
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "NOAA Climate Data Record of sea surface skin temperature"
	attribute scale_factor = 0.01
	attribute standard_name = "sea_surface_skin_temperature"
	attribute units = "kelvin"
	attribute valid_max = 4500
	attribute valid_min = -180
dataset /sses_bias: int8, shape (1, 4320, 8640)
	attribute _FillValue = -128
	attribute add_offset = 0.0
	attribute comment = "Bias estimate derived using the techniques described at http://www.ghrsst.org/SSES-Description-of-schemes.html. Note: in PFV5.2 this sses_bias is empty. PFV6 will contain the correct sses_bias values."
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "SSES bias estimate"
	attribute scale_factor = 0.02
	attribute units = "kelvin"
	attribute valid_max = 127
	attribute valid_min = -127
dataset /sses_standard_deviation: int8, shape (1, 4320, 8640)
	attribute _FillValue = -128
	attribute add_offset = 2.54
	attribute comment = "Standard deviation estimate derived using the techniques described at http://www.ghrsst.org/SSES-Description-of-schemes.html. Note: in PFV5.2 this sses_standard_deviation is empty. PFV6 will contain the correct sses_standard_deviation values."
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "SSES standard deviation"
	attribute scale_factor = 0.02
	attribute units = "kelvin"
	attribute valid_max = 127
	attribute valid_min = -127
dataset /sst_dtime: int32, shape (1, 4320, 8640)
	attribute _FillValue = -2147483648
	attribute add_offset = 0
	attribute comment = "time plus sst_dtime gives seconds after 1981-01-01 00:00:00. Note: in PFV5.2 this sst_dtime is empty. PFV6 will contain the correct sst_dtime values."
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute long_name = "time difference from reference time"
	attribute scale_factor = 1
	attribute units = "second"
	attribute valid_max = 2147483647
	attribute valid_min = -2147483647
dataset /time: int32, shape (1)
	attribute axis = "T"
	attribute calendar = "Gregorian"
	attribute comment = "This is the reference time of the SST file. Add sst_dtime to this value to get pixel-by-pixel times. Note: in PFV5.2 that sst_dtime is empty. PFV6 will contain the correct sst_dtime values."
	attribute long_name = "reference time"
	attribute standard_name = "time"
	attribute units = "seconds since 1981-01-01 00:00:00"
dataset /wind_speed: int8, shape (1, 4320, 8640)
	attribute _FillValue = -128
	attribute add_offset = 0.0
	attribute comment = "These wind speeds were created by NCEP-DOE Atmospheric Model Intercomparison Project (AMIP-II) reanalysis (R-2) and represent winds at 10 metres above the sea surface."
	attribute grid_mapping = "Equidistant Cylindrical"
	attribute height = "10 m"
	attribute long_name = "10m wind speed"
	attribute scale_factor = 1.0
	attribute source = "NCEP/DOE AMIP-II Reanalysis (Reanalysis-2): u_wind.10m.gauss.2004.nc, v_wind.10m.gauss.2004.nc"
	attribute standard_name = "wind_speed"
	attribute time_offset = 6.0
	attribute units = "m s-1"
	attribute valid_max = 127
	attribute valid_min = -127