Data Access Form

Dataset Title:	Analysed SST (OISSTs) 2023
Institution:	REMSS (Dataset ID: OISSTs_2023_v05_1)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	127	1 day (even)

latitude (degrees_north)	720	0.25 (even)

longitude (degrees_east)	1440	0.25 (even)

Grid Variables (which always also download all of the dimension variables)

analysed_sst (analysed sea surface temperature, degree_C)

analysis_error (estimated error standard deviation of analysed_sst, degree_C)

sea_ice_fraction (sea ice area fraction)

mask (land sea ice lake bit mask)

File type: (more information)

(Documentation / Bypass this form)

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.6725744e+9, 1.6834608e+9;
    String axis "T";
    String coverage_content_type "coordinate";
    String ioos_category "Time";
    String long_name "nominal time of L4 analysis";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -89.875, 89.875;
    String axis "Y";
    String comment "geographical coordinates, WGS84 datum";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.875, 179.875;
    String axis "X";
    String comment "geographical coordinates, WGS84 datum";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  analysed_sst {
    Float32 _FillValue -5.000849;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Temperature";
    String long_name "analysed sea surface temperature";
    String source "REMSS-L3C-AMSR2,REMSS-L3C-GMI";
    String standard_name "sea_surface_foundation_temperature";
    String units "degree_C";
    Float32 valid_max 49.99999;
    Float32 valid_min -5.0000095;
  }
  analysis_error {
    Float32 _FillValue -1.5104e-5;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "qualityInformation";
    String ioos_category "Statistics";
    String long_name "estimated error standard deviation of analysed_sst";
    String units "degree_C";
    Float32 valid_max 0.9999998;
    Float32 valid_min 1.5525e-7;
  }
  sea_ice_fraction {
    Float32 _FillValue -1.28;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "auxiliaryInformation";
    String ioos_category "Ice Distribution";
    String long_name "sea ice area fraction";
    String source "EUMETSAT OSI-SAF OSI_401D";
    String standard_name "sea_ice_area_fraction";
    Float32 valid_max 1.0;
    Float32 valid_min 0.0;
  }
  mask {
    Byte _FillValue -128;
    String _Unsigned "false";
    Float64 colorBarMaximum 80.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "referenceInformation";
    Byte flag_masks 1, 2, 4, 8, 16, 32, 64;
    String flag_meanings "water land optional_lake_surface sea_ice optional_river_surface IR_data MW_data";
    String ioos_category "Ice Distribution";
    String long_name "land sea ice lake bit mask";
    String standard_name "land_binary_mask";
    Byte valid_max 127;
    Byte valid_min 0;
  }
  NC_GLOBAL {
    String acknowledgement "http://www.remss.com/measurements/sea-surface-temperature/oisst-description";
    String cdm_data_type "Grid";
    String comment "This research was supported by the NASA Physical Oceanography Program";
    String Conventions "CF-1.10,ACDD-1.3, COARDS";
    String creator_email "support@remss.com";
    String creator_name "Remote Sensing Systems";
    String creator_type "institution";
    String creator_url "http://www.remss.com";
    String date_created "2023-05-09T14:27:56Z";
    Float64 Easternmost_Easting 179.875;
    String gds_version_id "2.0";
    Float64 geospatial_lat_max 89.875;
    Float64 geospatial_lat_min -89.875;
    Float64 geospatial_lat_resolution 0.25;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.875;
    Float64 geospatial_lon_min -179.875;
    Float64 geospatial_lon_resolution 0.25;
    String geospatial_lon_units "degrees_east";
    String history 
"2023-05-09 14:28:39+0000 created by sst_fusion_proc
2025-10-24T08:47:09Z (local files)
2025-10-24T08:47:09Z https://erddap.aoml.noaa.gov/hdb/erddap/griddap/OISSTs_2023_v05_1.das";
    String id "MW_OI-REMSS-L4-GLOB-v5.1";
    String infoUrl "https://cmr.earthdata.nasa.gov/search/concepts/C2205105895-POCLOUD";
    String institution "REMSS";
    String keywords "analysed, analysed_sst, analysis_error, area, binary, bit, cryosphere, data, deviation, distribution, earth, Earth Science > Cryosphere > Sea Ice > Ice Extent, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, Earth Science > Oceans > Sea Ice > Ice Extent, error, estimated, extent, foundation, fraction, global, ice, ice distribution, lake, land, land_binary_mask, mask, ocean, oceans, over, remote, remss, science, sea, sea_ice_area_fraction, sea_ice_fraction, sea_surface_foundation_temperature, sensing, sst, standard, statistics, surface, systems, temperature, time";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "GHRSST protocol describes data use as free and open";
    String metadata_link "https://cmr.earthdata.nasa.gov/search/concepts/C2205105895-POCLOUD";
    String naming_authority "org.ghrsst";
    Float64 Northernmost_Northing 89.875;
    String platform "GCOM-W1,GPM";
    String processing_level "L4";
    String product_version "v05.1";
    String project "Group for High Resolution Sea Surface Temperature";
    String publisher_email "ghrsst-po@nceo.ac.uk";
    String publisher_name "The GHRSST Project Office";
    String publisher_type "group";
    String publisher_url "https://www.ghrsst.org";
    String references "http://www.remss.com/measurements/sea-surface-temperature/oisst-description";
    String sensor "AMSR-2,GMI";
    String source "REMSS-L3C-AMSR2,REMSS-L3C-GMI";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.875;
    String spatial_resolution "25 km";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Analysed foundation sea surface temperature over the global ocean. A merged, multi-sensor L4 foundation SST product from Remote Sensing Systems";
    String testOutOfDate "now-5days";
    String time_coverage_end "2023-05-07T12:00:00Z";
    String time_coverage_start "2023-01-01T12:00:00Z";
    String title "Analysed SST (OISSTs) 2023";
    Float64 Westernmost_Easting -179.875;
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.