Data Access Form

Dataset Title:	IPRC, Aquarius, Optimally Interpolated Salinity, 0.5°, Global, 7-Day, 2011- 2015, v4.0, Lon0360
Institution:	IPRC, NASA (Dataset ID: iprcAquariusOISSS7day_Lon0360)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	200	6 days 21h 13m 34s (uneven)

latitude (degrees_north)	360	0.5 (even)

longitude (degrees_east)	720	0.5 (even)

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

sss (sea surface salinity, PSU)

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 1.3147056e+9, 1.4330736e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Center of 7-Day Period";
    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 -89.75, 89.75;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range 0.25, 359.75;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  sss {
    Float32 _FillValue -9999.0;
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String ioos_category "Salinity";
    String long_name "sea surface salinity";
    String standard_name "sea_surface_salinity";
    String units "PSU";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Comments "Aquarius SSS objectively interpolated onto a regular 0.5x0.5 grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String CreatedBy "oleg";
    String CreationDate "2015/08/20 14:08:55";
    String creator_email "jimp@hawaii.edu";
    String creator_name "IPRC";
    String creator_type "institution";
    String creator_url "https://iprc.soest.hawaii.edu/";
    String DataSource "Aquarius L2 V4.0";
    Float64 Easternmost_Easting 359.75;
    Float64 geospatial_lat_max 89.75;
    Float64 geospatial_lat_min -89.75;
    Float64 geospatial_lat_resolution 0.5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 359.75;
    Float64 geospatial_lon_min 0.25;
    Float64 geospatial_lon_resolution 0.5;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-11-21T15:48:51Z ftp://podaac-ftp.jpl.nasa.gov/allData/aquarius/L4/IPRC/v4/7day/
2024-11-21T15:48:51Z https://coastwatch.pfeg.noaa.gov/erddap/griddap/iprcAquariusOISSS7day_Lon0360.das";
    String infoUrl "http://iprc.soest.hawaii.edu/users/oleg/oisss/glb/Technical_Notes.pdf";
    String institution "IPRC, NASA";
    String keywords "center, data, density, Earth Science > Oceans > Salinity/Density > Salinity, international, interpolation, iprc, latitude, longitude, ocean, oceans, optimum, pacific, research, salinity, sea, sea_surface_salinity, soest, sss, surface, time";
    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, ERD, 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.";
    Float64 Northernmost_Northing 89.75;
    String Notes "http://iprc.soest.hawaii.edu/users/oleg/oisss/glb/Technical_Notes.pdf";
    String sourceUrl "ftp://podaac-ftp.jpl.nasa.gov/allData/aquarius/L4/IPRC/v4/7day/";
    Float64 Southernmost_Northing -89.75;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Level 4 optimally interpolated, 0.5 degree, near-global, 7 day sea surface salinity (OISSS) product for version 4.0 of the Aquarius/SAC-D dataset.  OISSS is a principal investigator produced dataset developed at the International Pacific Research Center (IPRC) of the University of Hawaii at Manoa, School of Ocean and Earth Science and Technology (SOEST).  The optimal interpolation (OI) mapping procedure used to create this product corrects for systematic spatial biases in Aquarius SSS data with respect to Argo near-surface salinity observations and takes into account available statistical information about the signal and noise, specific to the Aquarius instrument.  The product covers the entire duration of the Aquarius/SAC-D mission:  8/26/2011 - 6/7/2015. Further details on the data processing can be found in: Melnichenko, O., P. Hacker., N. Maximenko, G. Lagerloef, and J. Potemra (2016), Optimal interpolation of Aquarius sea surface salinity, J. Geophys. Res. Oceans, 121, 602-616, doi:10.1002/2015JC011343.";
    String time_coverage_end "2015-05-31T12:00:00Z";
    String time_coverage_start "2011-08-30T12:00:00Z";
    String title "IPRC, Aquarius, Optimally Interpolated Salinity, 0.5°, Global, 7-Day, 2011-2015, v4.0, Lon0360";
    Float64 Westernmost_Easting 0.25;
  }
}

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.