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Dataset Title:  Chlorophyll-a, Orbview-2 SeaWiFS, R2014.0, 0.1°, Global, 1997-2010 (1 Day
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Institution:  NASA/GSFC OBPG   (Dataset ID: erdSW1chla1day)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (Centered Time, UTC) ?      4503    1 day 1h 50m 2s (uneven)
  < slider >
 latitude (degrees_north) ?      2160    -0.08333334 (uneven)
  < slider >
 longitude (degrees_east) ?      4320    0.08333334 (uneven)
  < slider >
Grid Variables (which always also download all of the dimension variables)
 chlorophyll (Chlorophyll Concentration, OCI Algorithm, mg m^-3) ?

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 8.733744e+8, 1.2920688e+9;
    String axis "T";
    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";
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -89.95834, 89.95834;
    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 -179.9583, 179.9584;
    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;
  chlorophyll {
    Float32 _FillValue -32767.0;
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.03;
    String colorBarScale "Log";
    String ioos_category "Ocean Color";
    String long_name "Chlorophyll Concentration, OCI Algorithm";
    String references "Hu, C., Lee Z., and Franz, B.A. (2012). Chlorophyll-a algorithms for oligotrophic oceans: A novel approach based on three-band reflectance difference, J. Geophys. Res., 117, C01011, doi:10.1029/2011JC007395.";
    String standard_name "concentration_of_chlorophyll_in_sea_water";
    String units "mg m^-3";
    Float32 valid_max 100.0;
    Float32 valid_min 0.001;
    String _lastModified "2015-10-01T21:37:33.000Z";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "";
    String creator_name "NASA/GSFC/OBPG";
    String creator_type "group";
    String creator_url "";
    String date_created "2015-10-01T21:37:33.000Z";
    Float64 Easternmost_Easting 179.9584;
    Float64 geospatial_lat_max 89.95834;
    Float64 geospatial_lat_min -89.95834;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9584;
    Float64 geospatial_lon_min -179.9583;
    String geospatial_lon_units "degrees_east";
    String grid_mapping_name "latitude_longitude";
    String history 
2020-09-28T20:31:49Z (local files)
    String identifier_product_doi "";
    String identifier_product_doi_authority "";
    String infoUrl "";
    String institution "NASA/GSFC OBPG";
    String instrument "SeaWiFS";
    String keywords "algorithm, biology, center, chemistry, chlor_a, chlorophyll, color, concentration, concentration_of_chlorophyll_in_sea_water, data, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Optics > Ocean Color, field, field-of-view, flight, goddard, group, gsfc, image, L3, level, level-3, mapped, nasa, noaa, obpg, ocean, ocean color, oceans, oci, optics, orbview, orbview-2, palette, processing, sea, sea-wide, seawater, seawifs, sensor, smi, space, standard, view, water, wide";
    String keywords_vocabulary "GCMD Science Keywords";
    String license 
Please cite: NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Ocean Biology Processing Group; (2014): SeaWiFS Ocean Color Data; NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Ocean Biology Processing Group.

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.";
    String map_projection "Equidistant Cylindrical";
    String measure "Mean";
    String naming_authority "gov.noaa.pfeg.coastwatch";
    Float64 Northernmost_Northing 89.95834;
    String platform "Orbview-2";
    String processing_control_input_parameters_datamax "20.000000";
    String processing_control_input_parameters_datamin "0.010000";
    String processing_control_input_parameters_deflate "4";
    String processing_control_input_parameters_gap_fill "0";
    String processing_control_input_parameters_ifile "";
    String processing_control_input_parameters_latnorth "90.000000";
    String processing_control_input_parameters_latsouth "-90.000000";
    String processing_control_input_parameters_loneast "180.000000";
    String processing_control_input_parameters_lonwest "-180.000000";
    String processing_control_input_parameters_meas "1";
    String processing_control_input_parameters_minobs "0";
    String processing_control_input_parameters_ofile "";
    String processing_control_input_parameters_oformat "netCDF4";
    String processing_control_input_parameters_palfile "/sdps/sdpsoper/Science/OCSSW/V2015.3/data/common/palette/default.pal";
    String processing_control_input_parameters_precision "F";
    String processing_control_input_parameters_processing "2014.0";
    String processing_control_input_parameters_prod "chlor_a";
    String processing_control_input_parameters_projection "RECT";
    String processing_control_input_parameters_resolution "9km";
    String processing_control_input_parameters_seam_lon "-180.000000";
    String processing_control_input_parameters_stype "2";
    String processing_control_software_name "smigen";
    String processing_control_software_version "5.04";
    String processing_control_source "";
    String processing_level "L3 Mapped";
    String processing_version "2014.0";
    String product_name "";
    String project "Ocean Biology Processing Group (NASA/GSFC/OBPG)";
    String publisher_email "";
    String publisher_name "NASA/GSFC/OBPG";
    String publisher_url "";
    String references 
"SeaWiFS information: . NASA Ocean
Color information:
Processing reference: O'Reilly, J.E., Maritorena, S., Mitchell, B.G., Siegel, D.A., Carder, K.L., Garver, S.A., Kahru, M. and McClain, C. (1998). Ocean color chlorophyll algorithms for SeaWiFS. J. Geophys. Res., 103: 24, 937-24, 953.
Processing reference: O'Reilly, J. E., and 21 others. 2000. Ocean color chlorophyll a algorithms for SeaWiFS, OC2 and OC4: Version 4. SeaWiFS Postlaunch Calibration and Validation Analyses, part 3. NASA SeaWiFS technical report series. pp. 8 226 22.
Processing reference: Fu, G., Baith, K. S., and McClain, C. R. (1998). SeaDAS: The SeaWiFS Data Analysis System. Proceedings of \"The 4th Pacific Ocean Remote Sensing Conference\", Qingdao, China, July 28-31, 1998, 73-79.
Validation reference: Hooker, S.B., and C.R. McClain (2000). The Calibration and Validation of SeaWiFS Data. Prog. Oceanogr., 45, 427-465.
R2014.0 processing reference: Hu, C., Lee Z., and Franz, B.A. (2012). Chlorophyll-a algorithms for oligotrophic oceans: A novel approach based on three-band reflectance difference, J. Geophys. Res., 117, C01011, doi:10.1029/2011JC007395.";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.95834;
    String spatialResolution "9.20 km";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary 

NASA GSFC Ocean Color Web distributes science-quality chlorophyll-a
concentration data from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS)
on the Orbview-2 satellite. This version is the 2014.0 Reprocessing (R2014.0).

The SeaWiFS instrument was launched by Orbital Sciences Corporation on the
OrbView-2 (a.k.a. SeaStar) satellite in August 1997, and collected data from
September 1997 until the end of mission in December 2010. SeaWiFS had 8
spectral bands from 412 to 865 nm. It collected global data at 4 km
resolution, and local data (limited onboard storage and direct broadcast)
at 1 km. The mission and sensor were optimized for ocean color measurements,
with a local noon (descending) equator crossing time orbit, fore-and-aft
tilt capability, full dynamic range, and low polarization sensitivity.";
    String temporal_range "day";
    String time_coverage_end "2010-12-11T12:00:00Z";
    String time_coverage_start "1997-09-04T12:00:00Z";
    String title "Chlorophyll-a, Orbview-2 SeaWiFS, R2014.0, 0.1°, Global, 1997-2010 (1 Day Composite) DEPRECATED";
    Float64 Westernmost_Easting -179.9583;


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.

griddap request URLs must be in the form{?query}
For example,[(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.

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