Data Access Form

Dataset Title:	SST, NOAA GOES Imager, Day and Night, 0.05 degrees, Western Hemisphere
Institution:	NOAA CoastWatch WCN (Dataset ID: erdGAssta)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
time (Centered Time, UTC)	998	1 day 1h 6m 26s (uneven)

altitude (m)	1	(just one value)

latitude (degrees_north)	161	0.05 (even)

longitude (degrees_east)	161	0.05 (even)

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

GAssta (SST, NOAA GOES Imager, Day and Night, 0.05 degrees, Western Hemisphere, degree_C)

File type: (more info)

(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 1.4930352e+9, 1.5831504e+9;
    String axis "T";
    String calendar "gregorian";
    Int32 fraction_digits 0;
    String ioos_category "Time";
    String long_name "Centered Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  altitude {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    Int32 fraction_digits 0;
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 29.975, 37.975;
    String axis "Y";
    String coordsys "geographic";
    Int32 fraction_digits 3;
    String ioos_category "Location";
    String long_name "Latitude";
    String point_spacing "even";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 234.97500000000002, 242.97500000000002;
    String axis "X";
    String coordsys "geographic";
    Int32 fraction_digits 3;
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  GAssta {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 16.0;
    Float64 colorBarMinimum 13.0;
    String colorBarPalette "JetPlus";
    String coordinates "time altitude lat lon ";
    String coordsys "geographic";
    Int32 fraction_digits 1;
    String ioos_category "Temperature";
    String long_name "SST, NOAA GOES Imager, Day and Night, 0.05 degrees, Western Hemisphere";
    Float32 missing_value NaN;
    Int32 numberOfObservations 1755784;
    Float64 percentCoverage 0.278695873015873;
    String standard_name "sea_surface_temperature";
    String units "degree_C";
  }
  NC_GLOBAL {
    String acknowledgement "NOAA NESDIS COASTWATCH, NOAA SWFSC ERD";
    String cdm_data_type "Grid";
    Int32 cols 3000;
    String composite "true";
    String contributor_name "NOAA NESDIS";
    String contributor_role "Source of level 2 data.";
    String Conventions "CF-1.6, COARDS, Unidata Dataset Discovery v1.0";
    String creator_email "dave.foley@noaa.gov";
    String creator_name "NOAA CoastWatch, West Coast Node";
    String creator_url "https://coastwatch.pfeg.noaa.gov";
    String cwhdf_version "3.4";
    String date_created "2020-03-02";
    String date_issued "2020-03-02";
    Float64 Easternmost_Easting 242.97500000000002;
    Float64 et_affine 0.0, 0.05, 0.05, 0.0, 180.025, -44.975;
    Int32 gctp_datum 12;
    Float64 gctp_parm 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0;
    Int32 gctp_sys 0;
    Int32 gctp_zone 0;
    Float64 geospatial_lat_max 37.975;
    Float64 geospatial_lat_min 29.975;
    Float64 geospatial_lat_resolution 0.05;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 242.97500000000002;
    Float64 geospatial_lon_min 234.97500000000002;
    Float64 geospatial_lon_resolution 0.05;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String History 
"Translated to CF-1.0 Conventions by Netcdf-Java CDM (CFGridWriter2)
Original Dataset = satellite/GA/ssta/1day; Translation Date = 2020-03-03T08:00:05.573Z";
    String history 
"NOAA NESDIS
2020-03-02T06:16:08Z NOAA CoastWatch (West Coast Node) and NOAA SFSC ERD
2025-04-26T16:14:14Z (local files)
2025-04-26T16:14:14Z https://odss.mbari.org/erddap/griddap/erdGAssta.das";
    String id "LGAsstaS1day_20200301120000";
    String infoUrl "https://coastwatch.pfeg.noaa.gov";
    String institution "NOAA CoastWatch WCN";
    String keywords "coastwatch, day, degrees, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, goes, hemisphere, imager, night, noaa, ocean, oceans, sea, sea_surface_temperature, sst, surface, temperature, wcn, western";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, CoastWatch, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.";
    String Metadata_Conventions "CF-1.6, COARDS, Unidata Dataset Discovery v1.0";
    String naming_authority "gov.noaa.pfeg.coastwatch";
    Float64 Northernmost_Northing 37.975;
    String origin "NOAA NESDIS";
    String original_institution "NOAA CoastWatch, West Coast Node";
    Int32 pass_date 18322;
    Float64 polygon_latitude -44.975, 59.975, 59.975, -44.975, -44.975;
    Float64 polygon_longitude 180.025, 180.025, 329.975, 329.975, 180.025;
    String processing_level "3";
    String project "CoastWatch (https://coastwatch.noaa.gov/)";
    String projection "geographic";
    String projection_type "mapped";
    String references "NOAA GOES satellites: https://coastwatch.noaa.gov/goes_sst_overview.html . NOAA GOES satellites: http://www.oso.noaa.gov/goes/index.htm . Processing reference: Wu, X., W. P. Menzel, and G. S. Wade (1999). Estimation of sea surface temperatures using GOES-8/9 radiance measurements. Bull. Amer. Meteor. Soc., 80, 1127-1138. Processing reference: Maturi, E., C. Merchant, A. Harris, X. Li, and B. Potash.  Geostationary Sea Surface Temperature Product Validation and Methodology.  Poster Presentation at the American Meteorological Society's 13th Conference on Satellite Meteorology and Oceanography (P5.16).  Norfolk, VA; 19-23 Sept., 2004. http://ams.confex.com/ams/pdfpapers/79202.pdf .";
    Int32 rows 2100;
    String satellite "GOES";
    String sensor "Imager";
    String source "satellite observation: GOES, Imager";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 29.975;
    String standard_name_vocabulary "CF-1.0";
    Float64 start_time 0.0;
    String summary "NOAA CoastWatch provides SST data from the NOAA Geostationary Operational Environmental Satellites (GOES).  Measurements are gathered by the GOES Imager, a multi-channel radiometer carried aboard the satellite.  SST is available for hourly Imager measurements, or in composite images of various durations.";
    String time_coverage_end "2020-03-02T12:00:00Z";
    String time_coverage_start "2017-04-24T12:00:00Z";
    String title "SST, NOAA GOES Imager, Day and Night, 0.05 degrees, Western Hemisphere";
    Float64 Westernmost_Easting 234.97500000000002;
  }
}

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/jplMURSST.htmlTable?analysed_sst[(2015-06-09T09:00:00Z)][(-89.9945):1000:(89.9945)][(-179.995):1000:(179.995)]
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.