Data Access Form

Dataset Title:	SST, AQUA_MODIS, L3m.DAY.SST.sst.4km.NRT, Not Masked, SMI, NASA GSFC OBPG, R2019.0, Global, 0.04166°, 2019-2022, Daily
Institution:	NASA/GSFC OBPG (Dataset ID: erdMH1sstd1dayR20190NotMasked)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	974	1 day 0h 50m 19s (uneven)

latitude (degrees_north)	4320	-0.04166667 (even)

longitude (degrees_east)	8640	0.04166667 (even)

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

sst (Sea Surface Temperature, degree_C)

qual_sst (Quality Levels, Sea Surface Temperature)

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 1.5725664e+9, 1.6595712e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    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 -89.97917, 89.97916;
    String axis "Y";
    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 -179.9792, 179.9792;
    String axis "X";
    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;
  }
  sst {
    Float32 _FillValue -163.835;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Temperature";
    String long_name "Sea Surface Temperature";
    String standard_name "sea_surface_temperature";
    String units "degree_C";
    Float32 valid_max 50.0;
    Float32 valid_min -5.0;
  }
  qual_sst {
    Int16 _FillValue 255;
    String colorBarContinuous "false";
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    Int32 colorBarNSections 5;
    String ioos_category "Quality";
    String long_name "Quality Levels, Sea Surface Temperature";
    Int16 valid_max 5;
    Int16 valid_min 0;
  }
  NC_GLOBAL {
    String _lastModified "2022-08-05T05:09:23.000Z";
    String _NCProperties "version=2,netcdf=4.7.3,hdf5=1.12.0,";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6 ACDD-1.3, COARDS";
    String creator_email "data@oceancolor.gsfc.nasa.gov";
    String creator_name "NASA/GSFC/OBPG";
    String creator_type "group";
    String creator_url "https://oceandata.sci.gsfc.nasa.gov";
    String date_created "2022-08-05T05:09:23.000Z";
    Float64 Easternmost_Easting 179.9792;
    Float64 geospatial_lat_max 89.97916;
    Float64 geospatial_lat_min -89.97917;
    Float64 geospatial_lat_resolution 0.04166666589488307;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9792;
    Float64 geospatial_lon_min -179.9792;
    Float64 geospatial_lon_resolution 0.041666674383609215;
    String geospatial_lon_units "degrees_east";
    String history 
"l3mapgen par=AQUA_MODIS.yyyyMMdd.L3m.DAY.SST.sst.4km.NRT.nc.param
Every day, erd.data@noaa.gov downloads new files from https://oceandata.sci.gsfc.nasa.gov/MODIS-Aqua/Mapped/Daily/4km/sst/
2025-11-14T06:06:27Z (local files)
2025-11-14T06:06:27Z https://coastwatch.pfeg.noaa.gov/erddap/griddap/erdMH1sstd1dayR20190NotMasked.das";
    String infoUrl "https://oceancolor.gsfc.nasa.gov/data/aqua/";
    String institution "NASA/GSFC OBPG";
    String instrument "MODIS";
    String keywords "aqua, biology, center, color, data, earth, Earth Science > Oceans > Ocean Optics > Sea Surface Temperature, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, flight, goddard, group, gsfc, image, imaging, L3, level, level-3, levels, mapped, moderate, modis, modisa, nasa, obpg, ocean, oceans, optics, palette, processing, qual_sst, quality, resolution, science, sea, sea_surface_temperature, smi, space, spectroradiometer, sst, standard, surface, temperature";
    String keywords_vocabulary "GCMD Science Keywords";
    String l2_flag_names "LAND,HISOLZEN";
    String license "https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/";
    String map_projection "Equidistant Cylindrical";
    String measure "Mean";
    String naming_authority "gov.nasa.gsfc.sci.oceandata";
    Float64 Northernmost_Northing 89.97916;
    String platform "Aqua";
    String processing_level "L3 Mapped";
    String processing_version "R2019.0";
    String product_name "AQUA_MODIS.yyyyMMdd.L3m.DAY.SST.sst.4km.NRT.nc";
    String project "Ocean Biology Processing Group (NASA/GSFC/OBPG)";
    String publisher_email "data@oceancolor.gsfc.nasa.gov";
    String publisher_name "NASA/GSFC/OBPG";
    String publisher_type "group";
    String publisher_url "https://oceandata.sci.gsfc.nasa.gov";
    String source "satellite observations from MODIS-Aqua";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.97917;
    String spatialResolution "4.638312 km";
    String standard_name_vocabulary "CF Standard Name Table v36";
    String summary "Sea Surface Temperature (SST), not masked, from Moderate Resolution Imaging Spectroradiometer on Aqua (MODISA), Level-3 Standard Mapped Image (SMI), from NASA GSFC OBPG, R2019.0, Global, 0.04166°, Daily";
    String temporal_range "day";
    String time_coverage_end "2022-08-04T00:00:00Z";
    String time_coverage_start "2019-11-01T00:00:00Z";
    String title "SST, AQUA_MODIS, L3m.DAY.SST.sst.4km.NRT, Not Masked, SMI, NASA GSFC OBPG, R2019.0, Global, 0.04166°, 2019-2022, Daily";
    Float64 Westernmost_Easting -179.9792;
  }
}

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.