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Brought to you by NOAA NMFS SWFSC ERD
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ERDDAP
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Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | Cloudmask, CLAVR-1, NOAA POES AVHRR, 0.0125 degrees, West US, 2007-present, Daytime (Single Scan) 
|
| Institution: | NOAA NMFS SWFSC ERD (Dataset ID: erdATclddhday) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Files
| Make a graph
|
Attributes {
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.19350542e+9, 1.73215344e+9;
String axis "T";
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 22.0, 51.0;
String axis "Y";
String coordsys "geographic";
Int32 fraction_digits 4;
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 215.0, 255.0;
String axis "X";
String coordsys "geographic";
Int32 fraction_digits 4;
String ioos_category "Location";
String long_name "Longitude";
String point_spacing "even";
String standard_name "longitude";
String units "degrees_east";
}
cloudmask {
Float32 _FillValue -9999999.0;
Float64 colorBarMaximum 255.0;
Float64 colorBarMinimum 0.0;
String coordsys "geographic";
Int32 fraction_digits 0;
String ioos_category "Meteorology";
String long_name "Daytime Cloud Mask";
Float32 missing_value -9999999.0;
String standard_name "cloud_binary_mask";
String units "8 bits, encoded";
}
NC_GLOBAL {
String acknowledgement "NOAA NESDIS COASTWATCH, NOAA SWFSC ERD";
String cdm_data_type "Grid";
String composite "false";
String contributor_name "NOAA NWS Monterey and NOAA CoastWatch";
String contributor_role "Source of level 2 data.";
String Conventions "COARDS, CF-1.6, ACDD-1.3";
String creator_email "erd.data@noaa.gov";
String creator_name "NOAA NMFS SWFSC ERD";
String creator_type "institution";
String creator_url "https://www.pfeg.noaa.gov";
String date_created "2024-11-20";
String date_issued "2024-11-20";
Float64 Easternmost_Easting 255.0;
String files "2024_325_1744_m01_mo.hdf";
Float64 geospatial_lat_max 51.0;
Float64 geospatial_lat_min 22.0;
Float64 geospatial_lat_resolution 0.0125;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max 255.0;
Float64 geospatial_lon_min 215.0;
Float64 geospatial_lon_resolution 0.0125;
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
"NOAA NWS Monterey and NOAA CoastWatch
2022-09-25T20:20:38Z NOAA CoastWatch (West Coast Node) and NOAA SFSC ERD
2024-11-21T11:56:31Z (local files)
2024-11-21T11:56:31Z https://coastwatch.pfeg.noaa.gov/erddap/griddap/erdATclddhday.das";
String infoUrl "https://coastwatch.pfeg.noaa.gov/infog/AT_cldd_las.html";
String institution "NOAA NMFS SWFSC ERD";
String keywords "advanced, altitude, amount, area, ATcldd, atmosphere, avhrr, clavr, clavr-1, cloud, cloud cover, cloud_area_fraction, cloudiness, cloudmask, clouds, coastwatch, cover, data, day, daytime, degrees, Earth Science > Atmosphere > Clouds > Cloud Amount/Frequency, environmental, fraction, frequency, high, meteorology, monterey, national, noaa, nws, orbiting, poes, polar, radiometer, resolution, satellite, sea, service, sst, surface, temperature, time, US, very, vhrr, weather, west";
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.";
String naming_authority "gov.noaa.pfeg.coastwatch";
Float64 Northernmost_Northing 51.0;
String origin "NOAA NWS Monterey and NOAA CoastWatch";
String processing_level "3";
String project "CoastWatch (https://coastwatch.noaa.gov/)";
String projection "geographic";
String projection_type "mapped";
String publisher_email "erd.data@noaa.gov";
String publisher_name "NOAA NMFS SWFSC ERD";
String publisher_type "institution";
String publisher_url "https://www.pfeg.noaa.gov";
String references "CLAVR-1 Daytime Cloudmask Info: The CLAVR-1 cloudmask (Stowe, 1999) is used to cloudmask AVHRR high resolution sea surface temperature products. The cloudmask runs a series of tests on each surface temperature pixel to determine whether the pixel is contaminated by cloud cover. Users may evaluate which specific tests in the cloudmask returned positive cloud presence results by examining the value of the cloudmask. This value corresponds to an 8 bit binary number which details which tests flagged the pixel as a cloudy pixel. See https://coastwatch.pfeg.noaa.gov/info/CLAVR.html for more information regarding the specific tests used in the cloudmask. CLAVR-1 Reference: Stowe, L. L., P. A. Davis, and E. P. McClain. Scientific basis and initial evaluation of the CLAVR-1 global clear/cloud classification algorithm for the advanced very high resolution radiometer. J. Atmos. Oceanic Technol., 16, 656-681. 1999.";
String satellite "POES";
String sensor "AVHRR HRPT";
String source "satellite observation: POES, AVHRR HRPT";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 22.0;
String standard_name_vocabulary "CF Standard Name Table v70";
String summary " The CLAVR-1 cloudmask (Stowe, 1999) is used to cloudmask AVHRR high resolution sea surface temperature products. The cloudmask runs a series of tests on each surface temperature pixel to determine whether the pixel is contaminated by cloud cover. Users may evaluate which specific tests in the cloudmask returned positive cloud presence results by examining the value of the cloudmask. This value corresponds to an 8 bit binary number which details which tests flagged the pixel as a cloudy pixel. See https://coastwatch.pfeg.noaa.gov/info/CLAVR.html for more information regarding the specific tests used in the cloudmask.";
String testOutOfDate "now-2days";
String time_coverage_end "2024-11-21T01:44:00Z";
String time_coverage_start "2007-10-27T17:17:00Z";
String title "Cloudmask, CLAVR-1, NOAA POES AVHRR, 0.0125 degrees, West US, 2007-present, Daytime (Single Scan)";
Float64 Westernmost_Easting 215.0;
}
}
Data Access Protocol (DAP) and its
projection constraints.
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.