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SGP97 GCIP/EOP Surface: Precipitation NCEP/EMC 4KM Gridded Data (GRIB) Gage-Only 24h accumulated RFC -2001

posted on 2023-11-30, 08:39 authored by Long-Term Agroecosystem Research - LTAR, Southern Plains

The Southern Great Plains 1997 (SGP97) Hydrology Experiment originated from an interdisciplinary investigation, "Soil Moisture Mapping at Satellite Temporal and Spatial Scales" (PI: Thomas J. Jackson, USDA Agricultural Research Service, Beltsville, MD) selected under the NASA Research Announcement 95-MTPE-03. The Global Energy and Water Cycle Experiment (GEWEX) Continental-scale International Project (GCIP) Enhanced Observing Period (EOP) takes place in the Mississippi River basin during 1995-2000. The Mississippi River basin provides a number of watershed areas that are potentially useful for hydrologic focused studies. During this period, there will be a number of Enhanced Seasonal Observing Periods (ESOPs) in various smaller scale areas. The temporal coverage for this dataset is as follows: Begin date: 1995-10-01 00:00:00, End date: 2000-10-01 23:59:59. This dataset contains the National Centers for Environmental Prediction (NCEP) Environmental Modeling Center (EMC) 4 KM GRIB gage-only analysis using 24h accumulated ("RFC") dataset. 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). The format of the files is GRIB. The files are compressed using the UNIX "compress" command and "uncompress" must be used before decoding.

Resources in this dataset:


Agricultural Research Service

National Science Foundation


Data contact name

UCAR/NCAR/EOL > Earth Observing Laboratory, National Center for Atmospheric Research, University Corporation for Atmospheric Research

Data contact email


National Center for Atmospheric Research / Earth Observing Laboratory

Intended use

The GCIP scientific objectives are 1) Document the time-space variability of the hydrological and energy budgets at a continental-scale; 2) Develop and validate macro-scale land surface hydrologic models, related high resolution atmospheric models, and coupled hydrologic-atmospheric models; 3) Develop and validate information retrieval schemes incorporating existing and future satellite observations combined with enhanced ground-based observations; and 4) Provide a capability to translate the effects of a future climate change into impacts on water resources on a regional basis.

Use limitations

This dataset is provided as is and was not quality controlled by UCAR/JOSS.


  • Not specified

Geographic Coverage


ISO Topic Category

  • environment
  • farming

Ag Data Commons Group

  • Southern Plains
  • Long-Term Agroecosystem Research

National Agricultural Library Thesaurus terms

Great Plains region; soil water; satellites; Agricultural Research Service; Maryland; energy; hydrologic cycle; Mississippi River; watersheds; data collection; prediction; environmental models; prototypes; radar; rain; algorithms; rivers; computer software

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

Long-Term Agroecosystem Research - LTAR; Southern Plains (2021). SGP97 GCIP/EOP Surface: Precipitation NCEP/EMC 4KM Gridded Data (GRIB) Gage-Only 24h accumulated RFC -2001. National Center for Atmospheric Research / Earth Observing Laboratory.

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