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Dataset Title:  RSS CCMP V3.1 6-hourly surface winds (Level 4), Lon+/-180 Subscribe RSS
Institution:  RSS   (Dataset ID: ccmp_31_LonPM180)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
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Y Axis:  ?
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longitude (degrees_east) ?
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 7.259328e+8, 1.706724e+9;
    String axis "T";
    String coverage_content_type "coordinate";
    String delta_t "0000-00-00 06:00:00";
    String ioos_category "Time";
    String long_name "time of analysis";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
    Float32 valid_max 325074.0;
    Float32 valid_min 325056.0;
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -89.875, 89.875;
    String axis "Y";
    String coordinate_defines "center";
    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 coordinate_defines "center";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  uwnd {
    Float32 _FillValue -9999.0;
    String ancillary_variables "nobs";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String coverage_content_type "physicalMeasurement";
    String height "10 meters above sea-surface";
    String ioos_category "Wind";
    String long_name "u-wind vector component at 10 meters";
    String standard_name "eastward_wind";
    String units "m s-1";
    Float32 valid_max 100.0;
    Float32 valid_min -100.0;
  }
  vwnd {
    Float32 _FillValue -9999.0;
    String ancillary_variables "nobs";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String coverage_content_type "physicalMeasurement";
    String height "10 meters above sea-surface";
    String ioos_category "Wind";
    String long_name "v-wind vector component at 10 meters";
    String standard_name "northward_wind";
    String units "m s-1";
    Float32 valid_max 100.0;
    Float32 valid_min -100.0;
  }
  ws {
    Float32 _FillValue -9999.0;
    String ancillary_variables "nobs";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    String height "10 meters above sea-surface";
    String ioos_category "Wind";
    String long_name "wind speed at 10 meters";
    String standard_name "wind_speed";
    String units "m s-1";
    Float32 valid_max 140.0;
    Float32 valid_min 0.0;
  }
  nobs {
    Float32 _FillValue -9999.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "auxiliaryInformation";
    String ioos_category "Statistics";
    String long_name "number of observations used to derive wind vector components";
    String standard_name "number_of_observations";
    Float32 valid_max 100.0;
    Float32 valid_min 0.0;
  }
  NC_GLOBAL {
    String base_date "Y2024 M01 D31";
    String cdm_data_type "Grid";
    String contact "Remote Sensing Systems, support@remss.com";
    String contributor_name "Carl Mears, Tong Lee, Frank Wentz";
    String contributor_role "Principal-Investigator, Co-Investigator, Co-Investigator";
    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 data_structure "grid";
    String date_created "2024-04-02T03:02:33.958960Z";
    String doi "10.5067/CCMP-6HW10M-L4V31";
    Float64 Easternmost_Easting 179.875;
    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 
"2024-04-02T03:02:33.958960Z - netCDF generated from original data using Python 3.10 and xarray RSS using files: P:\\CCMP\\MEaSUREs\\era5_current_corrected_adj4_v31\\v3.1\\native\\y2024\\M01\\D31\\vam_v3.1.analysis.t20240131.z00.dat,P:\\CCMP\\MEaSUREs\\era5_current_corrected_adj4_v31\\v3.1\\native\\y2024\\M01\\D31\\vam_v3.1.analysis.t20240131.z06.dat,P:\\CCMP\\MEaSUREs\\era5_current_corrected_adj4_v31\\v3.1\\native\\y2024\\M01\\D31\\vam_v3.1.analysis.t20240131.z12.dat,
2024-07-22T20:50:49Z (local files)
2024-07-22T20:50:49Z https://coastwatch.pfeg.noaa.gov/griddap/ccmp_31_LonPM180.das";
    String infoUrl "http://www.remss.com/";
    String institute_id "RSS";
    String institution "RSS";
    String instrument "Earth Remote Sensing Instruments>Passive Remote Sensing>Spectrometers/Radiometers>Imaging Spectrometers/Radiometers>SSMIS, Earth Remote Sensing Instruments>Passive Remote Sensing>Spectrometers/Radiometers>Imaging Spectrometers/Radiometers>SSMIS, Earth Remote Sensing Instruments>Passive Remote Sensing>Spectrometers/Radiometers>Imaging Spectrometers/Radiometers>SSMIS, Earth Remote Sensing Instruments>Passive Remote Sensing>Spectrometers/Radiometers>Imaging Spectrometers/Radiometers>AMSRE, Earth Remote Sensing Instruments>Passive Remote Sensing>Spectrometers/Radiometers>Imaging Spectrometers/Radiometers>GMI, Earth Remote Sensing Instruments>Active Remote Sensing>Scatterometers>ASCAT, Earth Remote Sensing Instruments>Active Remote Sensing>Scatterometers>ASCAT";
    String instrument_vocabulary "GCMD instrument keywords";
    String keywords "10km - < 50km or approximately 0.09 degree - < 0.5 degree, 6-hourly, atmosphere, atmospheric, ccmp, component, components, data, derive, direction, earth, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Atmosphere Winds > Surface Winds > Wind Direction, Earth Science > Atmospheric Winds > Surface Winds > Wind Speed, Earth Science > Oceans > Ocean Winds, eastward, eastward_wind, hour, hourly, latitude, level, longitude, meters, nobs, northward, northward_wind, number, number_of_observations, observations, ocean, oceans, rss, science, speed, statistics, surface, time, u-wind, used, uwnd, v-wind, v3.1, vector, vwnd, wind, wind_speed, winds";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "This work is licensed under CC BY 4.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/";
    String long_name "RSS CCMP 6-Hourly 10 Meter Surface Winds Level 4 Version 3.1";
    String naming_authority "gov.nasa";
    Float64 Northernmost_Northing 89.875;
    String platform "Space-based Platforms>Earth Observation Satellites>Defense Meteorological Satellite Program (DMSP)>DMSP 5D-3/F16, Space-based Platforms>Earth Observation Satellites>Defense Meteorological Satellite Program (DMSP)>DMSP 5D-3/F17, Space-based Platforms>Earth Observation Satellites>Defense Meteorological Satellite Program (DMSP)>DMSP 5D-3/F18, Space-based Platforms>Earth Observation Satellites>GCOM-W1, Space-based Platforms>Earth Observation Satellites>GPM, Space-based PlatformsEarth Observation Satellites>Meteorological Operational Satellite (METOP)>METOP-A, Space-based PlatformsEarth Observation Satellites>Meteorological Operational Satellite (METOP)>METOP-B";
    String platform_vocabulary "GCMD platform keywords";
    String processing_level "L4";
    String product_version "3.1";
    String program "NASA/Ocean Vector Winds Science Team";
    String project "RSS Cross-Calibrated Multi-Platform Ocean Surface Wind Project";
    String publisher_email "podaac@podaac.jpl.nasa.gov";
    String publisher_institution "NASA/JPL/PO.DAAC";
    String publisher_name "Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA";
    String publisher_type "institution";
    String publisher_url "https://podaac.jpl.nasa.gov";
    String references "Mears, C.; Lee, T.; Ricciardulli, L.; Wang, X.; Wentz, F. Improving the Accuracy of the Cross-Calibrated Multi-Platform (CCMP) Ocean Vector Winds. Remote Sens. 2022, 14, 4230. https://doi.org/10.3390/rs14174230, Atlas, R., R. N. Hoffman, J. Ardizzone, S. M. Leidner, J. C. Jusem, D. K. Smith, D. Gombos, 2011: A cross-calibrated, multiplatform ocean surface wind velocity product for meteorological and oceanographic applications. Bull. Amer. Meteor. Soc., 92, 157-174. https://doi.org/10.1175/2010BAMS2946.1";
    String short_name "CCMP_WINDS_10M6HR_L4_V3.1";
    String source "blend of satellite and ERA-5 winds";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.875;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "RSS VAM 6-hour analyses using ERA-5 wind reanalyses as background.  Satellite winds (vector and scalar) are assimilated using a variational analysis identical to that used in CCMP V1.1. The ERA5 winds are adjusted to match winds from scatteromters before use in the analysis.";
    String time_coverage_end "2024-01-31T18:00:00Z";
    String time_coverage_start "1993-01-02T00:00:00Z";
    String title "RSS CCMP V3.1 6-hourly surface winds (Level 4), Lon+/-180";
    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.

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.


 
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