erdATcldnhday eng UTF8 dataset service Roy Mendelssohn NOAA NMFS SWFSC Environmental Research Division +1 831-420-3666 110 McAllister Road Santa Cruz CA 95060 USA erd.data@noaa.gov pointOfContact 2026-04-21 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 4 column 3201 0.0125 row 2321 0.0125 vertical 1 temporal 34285 16733.717185859292 area Cloudmask, CLAVR-1, NOAA POES AVHRR, 0.0125 degrees, West US, 2007-present, Nighttime (Single Scan) 2025-12-30 creation 2025-12-30 issued coastwatch.pfeg.noaa.gov erdATcldnhday NOAA NMFS SWFSC ERD erd.data@noaa.gov https://coastwatch.pfeg.noaa.gov/infog/AT_cldn_las.html information web browser Background Information Background information from the source information originator NOAA NWS Monterey and NOAA CoastWatch contributor 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. NOAA NESDIS COASTWATCH, NOAA SWFSC ERD NOAA NMFS SWFSC ERD erd.data@noaa.gov https://coastwatch.pfeg.noaa.gov/infog/AT_cldn_las.html information web browser Background Information Background information from the source information pointOfContact advanced amount area ATcldn atmosphere avhrr clavr clavr-1 cloud cloud cover cloudiness cloudmask clouds coastwatch cover data degrees environmental fraction frequency high meteorology monterey national night nighttime noaa nws orbiting poes polar radiometer resolution satellite sea service sst surface temperature US very vhrr weather west theme Earth Science > Atmosphere > Clouds > Cloud Amount/Frequency theme GCMD Science Keywords CoastWatch (https://coastwatch.noaa.gov/) project time altitude latitude longitude cloud_binary_mask theme CF Standard Name Table v70 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. CoastWatch (https://coastwatch.noaa.gov/) largerWorkCitation project Unidata Common Data Model Grid largerWorkCitation project eng geoscientificInformation 1 -145.0 -105.0 22.0 51.0 seconds 2007-10-27T04:57:00Z 2025-12-31T05:43:00Z 0.0 0.0 Cloudmask, CLAVR-1, NOAA POES AVHRR, 0.0125 degrees, West US, 2007-present, Nighttime (Single Scan) 2025-12-30 creation 2025-12-30 issued NOAA NMFS SWFSC ERD erd.data@noaa.gov https://coastwatch.pfeg.noaa.gov/infog/AT_cldn_las.html information web browser Background Information Background information from the source information originator NOAA NWS Monterey and NOAA CoastWatch contributor 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. ERDDAP griddap 1 -145.0 -105.0 22.0 51.0 seconds 2007-10-27T04:57:00Z 2025-12-31T05:43:00Z 0.0 0.0 tight ERDDAPgriddapDatasetQueryAndAccess https://coastwatch.pfeg.noaa.gov/erddap/griddap/erdATcldnhday ERDDAP:griddap ERDDAP-griddap ERDDAP's griddap service (a flavor of OPeNDAP) for gridded data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes. download Cloudmask, CLAVR-1, NOAA POES AVHRR, 0.0125 degrees, West US, 2007-present, Nighttime (Single Scan) 2025-12-30 creation 2025-12-30 issued NOAA NMFS SWFSC ERD erd.data@noaa.gov https://coastwatch.pfeg.noaa.gov/infog/AT_cldn_las.html information web browser Background Information Background information from the source information originator NOAA NWS Monterey and NOAA CoastWatch contributor 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. OPeNDAP 1 -145.0 -105.0 22.0 51.0 seconds 2007-10-27T04:57:00Z 2025-12-31T05:43:00Z 0.0 0.0 tight OPeNDAPDatasetQueryAndAccess https://coastwatch.pfeg.noaa.gov/erddap/griddap/erdATcldnhday OPeNDAP:OPeNDAP OPeNDAP An OPeNDAP service for gridded data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes. download physicalMeasurement cloudmask float Nighttime Cloud Mask Roy Mendelssohn NOAA NMFS SWFSC Environmental Research Division +1 831-420-3666 110 McAllister Road Santa Cruz CA 95060 USA erd.data@noaa.gov distributor OPeNDAP DAP/2.0 https://coastwatch.pfeg.noaa.gov/erddap/griddap/erdATcldnhday.html order Data Subset Form ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types. download https://coastwatch.pfeg.noaa.gov/erddap/griddap/erdATcldnhday.graph order Make-A-Graph Form ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data. mapDigital dataset NOAA NWS Monterey and NOAA CoastWatch 2022-09-24T05:19:52Z NOAA CoastWatch (West Coast Node) and NOAA SFSC ERD This record was created from dataset metadata by ERDDAP Version 2.30.0