1. Zhong Liu George Mason University and NASA GES DISC
TRMM and Other Global Precipitation Products and Data Services at NASA GES DISC
Zhong Liu
George Mason University and NASA GES DISC

2. Outline Introduction of data and services at GES DISC
TRMM and other precipitation products
Precipitation data services
Online Visualization and Analysis Tools (TOVAS)
Precipitation application services
Summary and URLs
Hands-on activity (if time allows)

3. Introduction
GES DISC: NASA Goddard Earth Sciences (GES) Data and Information Services Center (DISC), located at Goddard Space Flight Center, in Greenbelt, Maryland.
One of 12 NASA Science Mission Directorate (SMD) Data Centers that provide Earth science data, information, and services to research scientists, applications scientists, applications users, and students

4. Archives for: Precipitation (TRMM and others)
Hydrology (North American Land Data Assimilation System (NLDAS) and Global Land Data Assimilation System (GLDAS) data products (both generated by GSFC's Hydrological Sciences Branch).
Atmospheric composition
Atmospheric dynamics (Modern Era Retrospective-Analysis for Research and Applications (MERRA) data assimilation datasets (generated by GSFC’s Global Modeling and Assimilation Office)

5. Summary of Projects and Data Products at GES DISC http://mirador. gsfc

6. Summary of Projects and Data Products at GES DISC (Cont’)

7. TRMM and Other Precipitation Products

8. The Most Popular Products

11. How to order them?

12. Precipitation Data Services
Mirador (
Simple Subset Wizard (
OPeNDAP (
GDS (
Open Geospatial Consortium (OGC) Web Map Service (WMS)

13. Simple Subset Wizard

16. Online Visualization and Analysis Tools (TOVAS)
TOVAS stands for TRMM Online Visualization and Analysis System
Fast and easy to use
No data download is needed
Explore several popular TRMM standard products (3B42, 3B43, 3B42 daily, GPCP, etc.)
Allow downloading result data in NetCDF, HDF, and ASCII

17. Products in TOVAS Near-real-time Rainfall Archives
Ground Observation Archives
Other Ancillary Products

18. Near-real-time (3/2000 – present)
3-Hourly combined (3B42RT)
3-Hourly microwave (3B40RT)
Hourly IR (3B41RT)
Daily (derived from 3B42RT)

19. Rainfall Archives (1998 – present)
3-Hourly (3B42)
Daily (derived from 3B42)
10-day (derived from 3B42)
Monthly (3B43, 3A12, 3A25, GPCP, etc.)

20. Ground Observation Archives
Willmott ( , 0.5 deg)
GPCC (1986 – present, 1 deg)

21. Others: •Monthly Global Precipitation (GPCP)
• Prototype Interactive Inter-comparison of Rainfall Products
• Monthly Rainfall (3B43 V7) Anomaly
• Inter-Comparison of 3-hourly, Daily, Monthly and Rainfall Climatology

22. TOVAS Landing Page

23. Sample of TOVAS GUI

29. TOVAS Functions and Examples

30. TOVAS Functions:
Animation
Lat-Lon Area Plot, Time-averaged
Lat-Lon Plot, Difference Map
Latitude-Time Hovmöller Plot
Longitude-Time Hovmöller Plot
Correlation Plot
Comparison Plot
Cross-Map Plot (Latitude-Height)
Cross-Map Plot (Longitude-Height)
Cross-Map Plot (Time-Height)
Scatter Plot
Scatter Plot, Time-averaged
Time Series, Area-averaged
Time Series Difference
Time Series, Area Statistics

31. Other Features: Climatology Anomaly and normalized anomaly
Fine tune graphic output
Output in other formats (e.g., NetCDF)
Google Earth KMZ file output
Application examples with real events
FAQ and documentation
Help desk

32. 2D Plots (The contribution of Isabel in 2003)

33. 2D Lat-Lon Plots (Record breaking rainfall in the Mid-Atlantic Region in 2003)

34. Time Series Plots Mid- Atlantic Region Alex, Charley, Gaston Floyd
Isabel
Mid- Atlantic Region

35. Hovmoller Diagram (Mid-Atlantic Region)
Multiple Tropical Storms
Isabel
Floyd

36. Anomaly (Positive anomaly due to Isabel in Sept., 2003)

39. Other Ancillary Tools Hurricane Data Analysis Tool (HDAT)
Other Giovanni Tools

40. Hurricane Data Analysis Tool: http://disc.gsfc.nasa.gov/HDAT
The global merged IR product, also known as, the NCEP/CPC 4km Global (60ºN - 60ºS) IR Dataset, is one of TRMM ancillary datasets.
4 km IR
Global (60ºN - 60ºS)
30 minutes
Since Feb., 2000

41. Basic Functions and Features:
Selection of area of interest
Single image or multiple images (animation)
Allow time skipping (1 hr., 2 hr., etc.)
Allow different image sizes
False color
Fine tune graphic output

42. HDAT Landing Page

43. HDAT Landing Page (Cont.):

44. HDAT Landing Page (Cont.):

45. HDAT Landing Page (Cont.):

46. Examples: Category 2 cyclone Catarina – Landfall

47. AF Flight-447: Satellite Observation of Mesoscale Convective System Development on 1 June, 2009

49. Other Giovanni Tools: http://disc.sci.gsfc.nasa.gov/giovanni
Giovanni: GES-DISC (Goddard Earth Sciences Data and Information Services Center) Interactive Online Visualization ANd aNalysis Infrastructure

51. Summary
NASA global precipitation products (orbital, 3-hourly, daily, monthly) at your fingertips
Data services available (Search, Subsetting, Format conversion, OPeNDAP, GDS, WMS, etc.)
Online visualization and analysis system (TOVAS) to facilitate data exploration
Online documentation and user support available

52. URLs: Contact: Zhong.Liu@nasa.gov
TOVAS:
HDAT:
Mirador:
Giovanni:
Current conditions:
GES DISC:
Contact:

53. Thank You!

54. Hands-on Demo (if time allowed) http://disc2.nascom.nasa.gov/tovas/