NCEP/EMC 4KM Gridded Data (GRIB) Radar Est. w/bias removal UBR -2001 https://data.eol.ucar.edu/dataset/21.052 Summary This dataset contains the National Centers for Environmental Prediction (NCEP) Environmental Modeling Center (EMC) 4 KM GRIB radar estimate after bias removal ("UBR") data. A prototype, real-time, hourly, multi-sensor National Preciptation Analysis (NPA) has been developed at NCEP in cooperation with the Office of Hydrology (OH). This analysis merges two data sources that are currently being collected in real-time by OH and NCEP. Hourly digital precipitation (HDP) radar estimates are created by the WSR-88D Radar Product Generator on a 131 X 131 4-km grid centered over each radar site. Data analysis routines, including a bias correction of the radar estimates using rain gage data, have been adapted by NCEP on a national 4-km grid from algorithms developed by OH and executed regionally at NWS River Forecast Centers (RFC). This dataset only contains the NCEP 4 KM GRIB Data hourly, 6-hourly, and daily radar estimate after bias removal. 6-hourly data are generally available at 00Z, 06Z, 12Z, and 18Z. Daily data are generally available at 12Z. Depending on the time period selected, all three datasets may or may not be available. Other NCEP 4 KM GRIB Data including gage-only analysis, multi-sensor analysis (gage and unbiased radar), radar estimate (no bias removal), and gage-only analysis using 24h accumulated ("RFC") data are available as independent datasets. Depending on the time period selected, all five types may or may not be available. Please see GCIP/EOP: Surface NCEP Ancillary Catalogue of Available GCIP Precipitation Data (NCEP/EMC). The format of the files is GRIB. The files are compressed using the UNIX "compress" command and "uncompress" must be used before decoding. This dataset is provided as is and was not quality controlled by UCAR/JOSS. 31 August 2020: Start and end dates/times on the files were updated. 15 January 2021: Files missing from September 2000 were added. Identifiers * Local archive identifier: 21.052 * doi:10.26023/SQ1C-NSRF-7K09 https://doi.org/10.26023/SQ1C-NSRF-7K09 Versions 1.0 Citation Du, J. 2006. NCEP/EMC 4KM Gridded Data (GRIB) Radar Est. w/bias removal UBR -2001. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.26023/SQ1C-NSRF-7K09 Accessed 29 Mar 2024. Additional citation styles can be generated by entering the DOI at CrossCite (https://citation.crosscite.org/). Acknowledgement In addition to the citation reference and any other acknowledgements, please acknowledge NCAR/EOL in your publications with text such as: Data provided by NCAR/EOL under the sponsorship of the National Science Foundation. https://data.eol.ucar.edu/ Related projects * GCIP/NESOB-97: ARM/GCIP Near-Surface Observation Data Set - 1997 https://data.eol.ucar.edu/project?GCIP%2FNESOB-97 * GCIP/ESOP-98: GCIP Large Scale Area-North Central ESOP-98 https://data.eol.ucar.edu/project?GCIP%2FESOP-98 * SGP97: Southern Great Plains 1997 Hydrology Experiment https://data.eol.ucar.edu/project/SGP97 * SGP99: Southern Great Plains 1999 Hydrology Experiment https://data.eol.ucar.edu/project/SGP99 * GCIP/LSA-NW 00: GCIP Large Scale Area-North West EAOP-00 https://data.eol.ucar.edu/project?GCIP%2FLSA-NW+00 * Operational: Operational Datasets https://data.eol.ucar.edu/project/Operational * UMRBPP: Upper Missouri River Basin Pilot Project https://data.eol.ucar.edu/project/UMRBPP * GCIP/EAOP-98: GCIP Large Scale Area-East EAOP-98 https://data.eol.ucar.edu/project?GCIP%2FEAOP-98 * GCIP/ESOP-97: GCIP Large Scale Area-North Central ESOP-97 https://data.eol.ucar.edu/project?GCIP%2FESOP-97 * GCIP/EAOP-99: GCIP Large Scale Area-East EAOP-99 https://data.eol.ucar.edu/project?GCIP%2FEAOP-99 * GCIP/EOP: GCIP Enhanced Observing Period https://data.eol.ucar.edu/project?GCIP%2FEOP * GCIP/LSA-NW 99: GCIP Large Scale Area-North West EAOP-99 https://data.eol.ucar.edu/project?GCIP%2FLSA-NW+99 Additional information * Spatial Type: point * Frequency: hourly * Language: English Categories * Surface Platforms * Weather Stations Instruments * Doppler Radar * NEXt Generation RADar (NEXRAD) * Radar * Rain Gauges GCMD Science Keywords * EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > PRECIPITATION AMOUNT Documentation * katz_stage4_readme.txt [12 KiB] https://data.eol.ucar.edu/file/download/4106B22C/katz_stage4_readme.txt Related links * companion: 21.011: NCEP/EMC Ancillary Catalog of Available GCIP Precipitation Data-2001 https://data.eol.ucar.edu/dataset/21.011 * companion: 21.009: NCEP/EMC U.S. Precipitation Ancillary Station List https://data.eol.ucar.edu/dataset/21.009 * superceded_by: 21.006: GCIP/EOP Surface: Precipitation NCEP/EMC 4 KM Gridded Dataset (GRIB) https://data.eol.ucar.edu/dataset/21.006 Temporal coverage * Begin datetime: 1997-04-23 00:00:00 * End datetime: 2001-12-31 23:59:59 Spatial coverage * Maximum (North) Latitude: 49.00 * Minimum (South) Latitude: 25.00 * Minimum (West) Longitude: -125.00 * Maximum (East) Longitude: -67.00 Primary contact information * pointOfContact: Jun Du https://data.eol.ucar.edu/contact/show/2568 Additional contact information * author: Jun Du https://data.eol.ucar.edu/contact/show/2568 Alternate metadata formats * DataCite: https://data.eol.ucar.edu/dataset/21.052?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/21.052?format=isotc211