• Purpose
  The purpose of the 3GPROF algorithm is to provide monthly and daily mean precipitation and related retrieved parameters from the Level 2 GPROF precipitation profiling algorithm for the GPM core and constellation satellites. Each 3GPROF product contains global 0.25 degree x 0.25 degree gridded monthly/daily means. Because this product is an accumulation of the Level 2 retrieval products, much more information is available via the GPROF Level 2 documentation.
• DOI

  10.5067/GPM/MHS/NOAA19/3A-DAY/05

• Search for granules from this collection

Data Dates

Creation	2014-07-14T00:00:00.000Z
Last Revision	2014-07-14T00:00:00.000Z

Processing Level
3
Quality The primary limitation of the 3GPROF product is the reliance on a single sensor for each output file, thus limiting the available sampling to two times a day or less, except at high latitudes. In addition, with the exception of the GMI, TMI, and SAPHIR sensors, all of the other sensors are in Sun-synchronous orbits, meaning that they observe a given point on the Earth's surface at the same local times each day. Over land regions in particular, this can lead to large sampling errors associated with the diurnal cycle. Errors due to the limited sampling and differences in the sampling times between Sun-synchronous satellites (e.g., F16, F17, F18, NOAA-18, NOAA-19, NPP, METOP-A, METOP-B, and GCOM-W1) can lead to significant differences in the monthly mean values between satellites/sensors. The sampling errors are largest over land regions with large diurnal cycles in precipitation. Other sources of error that can significantly impact the 3GPROF products include difficulties over certain surface types such as sea ice, snow, frozen ground, and deserts, and limited sensitivity of the sounder instruments (in particular to light precipitation and/or shallow warm rain systems). The sounders include the ATMS, MHS, and SAPHIR sensors, which do not have channels with sensitivity to the surface and/or lower atmosphere.
• Collection Progress

  Active

• Use Constraints

  The Earth Observing System Data and Information System (EOSDIS) data use policy for NASA data can be accessed at https://earthdata.nasa.gov/earth-observation-data/data-use-policy. For information on how to properly cite and acknowledge data from the NASA GES DISC, refer to https://disc.gsfc.nasa.gov/information/documents?title=data-policy.

• Access Constraints

  None

Projects

Coverage Type	Zone Identifier	Geometry	Granule Representation
HORIZONTAL		CARTESIAN	CARTESIAN

Location Keywords

• • GEOGRAPHIC REGION
  • TROPICS

• NASA/GSFC/SED/ESD/GCDC/GESDISC

  ARCHIVER

  Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

  This data center does not have any addresses listed.

  This data center does not have any contact mechanisms listed.

  NASA GES DISC Website

  https://disc.gsfc.nasa.gov/
  

  • Home Page

• CHRISTIAN KUMMEROW

  Investigator

  CHRISTIAN KUMMEROW

  • Department of Atmospheric Science
    Colorado State University
    Fort Collins, CO 80523

  1-970-491-7473

  1-970-491-8449

  Email

• ANDREY SAVTCHENKO

  Metadata Author

  ANDREY SAVTCHENKO

  • Distributed Active Archive Center Global Change Data Center
    Code 610.2
    NASA Goddard Space Flight Center
    Greenbelt, MD 20771

  301-614-5705

  Email

• GES DISC HELP DESK SUPPORT GROUP

  Data Center Contact

  GES DISC HELP DESK SUPPORT GROUP

  NASA/GSFC/SED/ESD/GCDC/GESDISC

  • Goddard Earth Sciences Data and Information Services Center
    Code 610.2
    NASA Goddard Space Flight Center
    Greenbelt, MD 20771

  301-614-5224

  301-614-5268

  Email

File Distribution Information

• Format: HDF5

  Format Type: Native

  Media: Online Archive

  Fees: None