|Arthur Y. Hou
International Precipitation Working Group
|The International Precipitation Working Group (IPWG) was established
as a permanent Working Group of the Coordination Group for Meteorological Satellites
(CGMS) on 20-22 June 2001 in Ft. Collins, CO.
The IPWG is co-sponsored by CGMS and the World Meteorological Organization (WMO)
and focuses the scientific community on operational and research satellite based quantitative
precipitation measurement issues and challenges.
|It provides a forum for operational and research users of satellite precipitation measurements to
exchange information on methods for measuring precipitation and the impact of space borne precipitation
measurements in numerical weather and hydrometeorological prediction and climate studies.
|In the area of quantitative precipitation estimation, the IPWG intends to build upon the expertise of
scientists who are currently involved in precipitation measurements from satellites with emphasis on
derivation of products. The IPWG is established to foster the:
- Development of better measurements, and improvement of their utilization;
- Improvement of scientific understanding;
- Development of international partnerships.
|The objectives of the IPWG are:
- to promote standard operational procedures and common software for deriving precipitation measurements
- to establish standards for validation and independent verification of precipitation measurements derived
from satellite data; including:
- reference standards for the validation of precipitation for weather, hydrometeorological and climate applications;
- standard analysis techniques that quantify the uncertainty of ground-based measurements over relevant
time and space scales needed by satellite products;
- to devise and implement regular procedures for the exchange of data on inter-comparisons of operational
precipitation measurements from satellites;
- to stimulate increased international scientific research and development in this field and to establish
routine means of exchanging scientific results and verification results;
- to make recommendations to national and international agencies regarding the utilization of current and
future satellite instruments on both polar and geostationary platforms; and
- to encourage regular education and training activities with the goal of improving global utilization of
remote sensing data for precipitation measurements.
|The Working Group shall be comprised of representatives nominated by the satellite operators of the CGMS,
other members of CGMS and relevant research satellite operators. The CGMS or the IPWG may invite other experts
from the community to participate in the activities of the group.
|The Working Group will be chaired by two Co-Chairmen appointed by the plenary of the CGMS.
The Co-Chairmen shall compile a report on relevant activities for the scheduled plenary meetings of the CGMS.
The interactive connection with satellite operators will be performed through the use of a Rapporteur who will
attend and report to the CGMS meetings.
|Under the lead of the two Co-Chairmen, the IPWG will organize Workshops, co-sponsored by CGMS and WMO,
approximately every two years. The Workshops will promote the exchange of scientific and operational information
between the producers of precipitation measurements, the research community, and the user community.
|Pages hosted by the Institute of Atmospheric Sciences and Climate (ISAC)
of the National Research Council (CNR).