# Presentation: 413437

## Anatomy of TRMM Science Data Support and Services at the NASA GES DISC:

- Data Access

**NASA GSFC Earth Sciences (GES)**
**Data and Information Services Center (DISC)**
**William.L.Teng@nasa.gov**

**Anatomy of TRMM Science Data Support and Services at the NASA GES DISC:**

**the past 10 years and a look ahead to GPM**

- 3rd International TRMM Science Conference, February 4-8, 2008

**Acknowledgment:**
- The authors are grateful for the valuable contributions to TRMM data support by former members of the GES DISC and for the continued support by NASA. Graphics support for this poster was provided by Edee Ocampo.

**Conclusions**:  At all times, the GES DISC’s TRMM support remains responsive to user needs, accommodating to unanticipated demands, and innovative in availing the users of the latest appropriate technology. Through this support, in the 10 years of TRMM thus far, the GES DISC has largely achieved the goal of enabling an increasing number and variety of users to fully benefit from the use of TRMM data in solving problems. Innovative services are increasingly important and will be the focus of the GES DISC going into the GPM era.

- TRMM Version** 4** Reprocessing:
- October 1998 to February 1999

- TRMM Version 5 Reprocessing:
- November 1999 to April 2000

**1999**

**1997**

**2001**

**2003**

**2005**

**2007**

**2009**

**2013 ?**

**1998**

**2000**

**2002**

**2004**

**2006**

**2008**

**2010**

- TRMM Version 6 Reprocessing:
- April 2004 to April 2005

**TRMM Data Mining:**
- Migrating data reduction activities from users to the GES DISC reduces the volume of distributed data; users receive more information-rich products.

**TRMM Data Products**:
-  Standard products
-  Subsets (spatial,
-    gridded, coincidence)
-  Ancillary
-  GIS-compatible

**Value-added Products and Services:**  Although an unimpeded data flow forms the basis of the GES DISC’s TRMM data support, it would be largely unused by the general users, were the flow not directed at actual user needs, helping to solve user problems. To realize this latter goal, the GES DISC has a long-term commitment to developing value-added products and services, aimed at these needs.

**Jun **

**Sep **

**Dec **

**~ **

**Nov **

**Jun **

**~ **

**Feb **

**Aug **

**Jan **

**Jun**

**Aug**

- Data Services

**http://disc.gsfc.nasa.gov/services/nadm/index.shtml**

- TRMM Extension:
- To September 2009; eliminated requirement for controlled reentry.

- William Teng1,2, Hualan Rui1,3, John Bonk1,3, Pat Hrubiak1,2, Zhong Liu1,4, Denis Nadeau1,2,
- Dana Ostrenga1,3, and Greg Leptoukh1
- (1NASA/GES DISC, 2 RSIS, 3Adnet, 4George Mason Univ.)

**Introduction**:   Successful science data support for Earth observing satellite missions and their data systems requires a large, well-planned and well-coordinated set of activities that spans more than the lifetime of the missions. The Goddard Earth Sciences Data and Information Services Center (GES DISC) has been providing such science data support for numerous satellite missions since 1993, including the Tropical Rainfall Measuring Mission (TRMM) and the EOS missions (Terra, Aqua, and Aura). These cradle-to-grave data support activities are summarized below. The goal is to enable users to fully realize the scientific, educational, and application potential of GES DISC data. TRMM is a joint mission of the National Aeronautics and Space Administration (NASA) and the Japan Aerospace Exploration Agency (JAXA) to monitor and study tropical and subtropical rainfall systems.

**Utilization Ratio (UR)** - *Ratio of number of distributed files to number of archived files*

**1999**

**1998**

**2000**

**2001**

**2002**

**January**

**UR=5.7**

**November**

**UR=6.9**

**2006**

**2007**