NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 2 Cloud Top Phase (ACTP)

ABI-L2-ACTP

browse graphicExample of the Cloud Phase product as generated by the GOES-R Cloud Phase algorithm.
The Cloud Top Phase product contains an image with pixel values identifying the presence of cloud in four phase categories. The categories, which are consistent with heritage NOAA and NASA cloud products, include: Warm liquid water: liquid water cloud with an opaque cloud temperature greater than 273 degrees K; Supercooled liquid water: liquid water topped cloud with an opaque cloud temperature less than 273 degrees K; Mixed phase clouds: high probability of containing both liquid water and ice near cloud top; Ice phase clouds: all ice topped clouds. The Cloud Top Phase product image data variable also has categories for clear sky and unknown phases. A pixel is classified as having an unknown phase when the retrieval has failed because of missing or bad input data. The product includes data quality information that provides an assessment of the the cloud top phase data values for on-earth pixels. The cloud top phase value is a dimensionless quantity which is provided at 2 km resolution on the ABI fixed grid for Full Disk, CONUS, and Mesoscale coverage regions. Product data is produced for geolocated source data to local zenith angles of 90 degrees for both daytime and nighttime conditions.
  • Cite as: GOES-R Algorithm Working Group and GOES-R Program Office, (2018): NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 2 Cloud Top Phase (ACTP). [indicated subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5NP22QW [access date].
Order Data
Distribution Formats
  • NetCDF (Version: 4)
Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
ncei.sat.info@noaa.gov
Time Period 2017-05-16 to Present (time interval: 15-minute)
Spatial Reference System urn:ogc:def:crs:EPSG::4326
Spatial Bounding Box Coordinates
N: 81.3282
S: -81.3282
E: 6.2995
W: -156.2995
N: 81.3282
S: -81.3282
E: -55.7005
W: 141.7005
Spatial Coverage Map
General Documentation
Processing Documents
Associated Resources
Publication Dates
  • publication: 2018-02-22
Edition Provisional
Data Presentation Form Digital image
Dataset Progress Status Ongoing - data is continually being updated
Data Update Frequency Continual
Purpose The Cloud Type algorithm will use four GOES-R ABI infrared spectral bands to determine four different cloud phases: warm (>0C) liquid water, supercooled liquid water, mixed, and ice. The Cloud Phase product is a prerequisite for generating other downstream products that include Cloud Height, Cloud Optical Properties, Fog Detection/Depth, and Aircraft Icing. The Cloud Top Phase product will enable meteorologists to better monitor and track changes in the water properties of clouds, improve icing forecasts for the aviation community, and aid in improving warnings for severe weather. Cloud Phase product information can also be used in advanced ABI applications such as severe weather prediction and tropical cyclone intensity estimation.
Use Limitations
  • For a complete description of use limitations for this dataset, refer to the Algorithm Theoretical Basis Document (ATBD).
Dataset Citation
  • Cite as: GOES-R Algorithm Working Group and GOES-R Program Office, (2018): NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 2 Cloud Top Phase (ACTP). [indicated subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5NP22QW [access date].
Cited Authors
  • GOES-R Algorithm Working Group
  • GOES-R Series Program
Principal Investigators
  • GOES-R Algorithm Working Group
Resource Providers
  • GOES-R Series Program
Publishers
  • NOAA National Centers for Environmental Information
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Atmosphere > Clouds > Cloud Types
Global Climate Observing System (GCOS) Essential Climate Variables (ECVs)
  • Atmospheric - Upper-air - Cloud Properties
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • GOES-16 > Geostationary Operational Environmental Satellite 16
  • GOES-17 > Geostationary Operational Environmental Satellite 17
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • ABI > Advanced Baseline Imager
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Geographic Region > Equatorial
  • Geographic Region > Mid-Latitude
  • Geographic Region > Northern Hemisphere
  • Geographic Region > Southern Hemisphere
  • Geographic Region > Western Hemisphere
  • Geographic Region > Tropics
  • Continent > North America > United States Of America
  • Continent > North America > Central America
  • Continent > South America
  • Ocean > Atlantic Ocean
  • Ocean > Pacific Ocean
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • GOES > Geostationary Operational Environmental Satellites
  • gov.noaa.class:GRABIPRD
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • 1 km - < 10 km or approximately .01 degree - < .09 degree
Global Change Master Directory (GCMD) Temporal Data Resolution Keywords
  • 1 minute - < 1 hour
Stratum keywords Global Change Master Directory (GCMD) Location Keywords
  • Vertical Location > Troposphere
Use Constraints
  • Cite as: GOES-R Algorithm Working Group and GOES-R Program Office, (2018): NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 2 Cloud Top Phase (ACTP). [indicated subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5NP22QW [access date].
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Lineage Statement These data were produced by the NOAA Office of Satellite and Product Operations (OSPO) and are archived at the NOAA National Centers for Environmental Information (NCEI).
Processor
  • DOC/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations, NESDIS, NOAA, U.S. Department of Commerce
Processing Steps
  • The Cloud Top Phase product is generated by the GOES-R ABI Cloud Type ground processing algorithm. The algorithm determines the cloud top phase for pixels identified as cloudy, probably cloudy, and probably clear in the intermediate 4-level cloud mask generated by the Cloud Mask algorithm. Clear sky is determined using clear pixels indicated in the temporally coincident intermediate 4-level cloud mask generated by the Cloud Mask algorithm.
  • 2017-05-16T00:00:00 - The GOES-16 ABI Cloud Phase algorithm reached beta maturity.
  • 2018-02-22T00:00:00 - The GOES-16 ABI Cloud Phase algorithm reached provisional maturity.
  • The GOES-16 ABI Cloud Phase algorithm reached full validation maturity.
  • 2018-08-27T00:00:00 - The GOES-17 ABI Cloud Phase algorithm reached beta maturity.
  • The GOES-17 ABI Cloud Phase algorithm reached provisional maturity.
  • The GOES-17 ABI Cloud Phase algorithm reached full validation maturity.
Processing Documents
Source Datasets
  • NOAA GOES-R Series Advanced Baseline Imager (ABI) Level 1b Radiances
    • NCEI landing page for ABI-L1B-RAD
      Source dataset landing page with general information and access links for the dataset.
    • Description of Source: Level 1b radiances
    • Temporal extent used: 2017-02-28 to Present
    • Spatial extent used: N:81.3282 S:-81.3282 E:6.2995 W:-156.2995
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Last Modified: 2019-06-24
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