Atmos CompositionTRMM Online Visualization and Analysis System (TOVAS)
| Important: Technical details about retrospective processing for Version 7 TMPA, TMPA-RT (2012/11/28) |
From Dr. George Huffman:
Summary: Processing issues were discovered with both series of data and it was decided to re-do the retrospective processings to correct the issues. In general the original Version 7 data sets are considered an improvement over Version 6, but this additional processing is considered important to meet the goals of the project. Details: It was recently discovered that AMSU data were neglected in the first retrospective processing of both the Version 7 TMPA (3B42/43) and TMPA-RT (3B40/41/42RT) data series, which creates an important shortcoming in the inventory of microwave precipitation estimates used during 2000-2010. In addition, a coding error in the TMPA-RT replaced the occasional missings in product 3B42RT with zeros. Accordingly, both product series are being retrospectively processed again. The main impact in both series should be to improve the fine-scale patterns of precipitation during 2000-2010 (and for 3B4xRT into late 2012). Averages over progressively larger time/space scales should be progressively less affected. [This is the reason the lack of AMSU went undiscovered; the merger system copes very reasonably with missing data.] Nonetheless, users are urged to switch to the newest Version 7 data sets as soon as they are computed and posted (in the next few weeks). The newest runs may be identified by the file names: V.7 3B42/43 suffix of "7A.HDF" for January 2000 - September 2010 V.7 3B4xRT suffix of "7R2.bin" for 1 March 2000 - 6 November 2012 It continues to be the case that the Version 7 3B42/43 is some 5-8% higher than the calibrating data set (2B31) over oceans, which is believed to be erroneous. However, the first several attempts at diagnosing this issue have not been fruitful. At the large scales this offset seems to be nearly a proportional constant. We apologize for the thrashing around! As always, please ask if you have additional questions.
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| Important: Recall of 3B42 and 3B43 (2012/11/28) |
From PPS: Due to a processing error during the first Version 7 re-processing cycle,
PPS will be rolling back and replacing TRMM 3B42 and 3B43 data products
including Browse for January 2000 through September 2010.
The TRMM GIS products will also be replaced, but will not be removed prior to replacement. During the next several days (over the Thanksgiving break) PPS will be deleting the existing 3B4X products from our archives in preparation for reprocessing these replacement products. Therefore, please be aware that the 3B42 and 3B43 and associated products will be temporarily unavailable. If you have obtained any 3B42/3B43 data from the PPS ftp data archive or through a Standing Order/s, please discard this data and use the replacement products once they become available. PPS will issue another announcement once this new data is archived. We apologize for any inconvenience that this correction may cause and appreciate your patience and understanding. Please let us know if you have any questions or concerns. Questions or concerns: gsfc-help-disc@lists.nasa.gov
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| Important: New Web Host for TOVAS (2012/11/01) |
As planned, most TOVAS instances listed below in this page have be converted to the new system and can be accessed through the new TOVAS landing page,
http://disc.sci.gsfc.nasa.gov/precipitation/tovas This landing page will be re-directed to the above new landing page soon. Questions or concerns: gsfc-help-disc@lists.nasa.gov
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Welcome to TOVAS, a member of the Giovanni (GES-DISC DAAC On-line Visualization and Analysis System) family, which provides users with an easy-to-use, Web-based interface for the visualization and analysis of Earth Science data.
Note: The Java Version uses Java applet for interactively selecting an area of interest. If you have difficulties in using the Java Version, please try the Non Java Version.
Near-Real-Time Monitoring Product (For research, use Archive Data.) | ||
|---|---|---|
| Experimental Real-Time TRMM Multi-Satellite Precipitation Analysis (TMPA-RT): 3B42RT | JAVA_Version | Non_JAVA_Version |
| Daily Global and Regional Rainfall (TMPA-RT 3B42RT derived) | JAVA_Version | Non_JAVA_Version |
| TMPA-RT Intermediate IR Product: 3B41RT (VAR) | JAVA_Version | Non_JAVA_Version |
| TMPA-RT Intermediate Microwave Product: 3B40RT (HQ) | JAVA_Version | Non_JAVA_Version |
Rainfall Archives | ||
| Monthly Global Precipitation (GPCP) | JAVA_Version | Non_JAVA_Version |
| Prototype Interactive Intercomparison of Rainfall Products | JAVA_Version | Non_JAVA_Version |
| 3-hourly TRMM and Other Rainfall Estimate (3B42 V7) | JAVA_Version | Non_JAVA_Version |
| Daily TRMM and Other Rainfall Estimate (3B42 V7 derived) | JAVA_Version | Non_JAVA_Version |
| Monthly TRMM and Other Data Sources Rainfall Estimate (3B43 V7) | JAVA_Version | Non_JAVA_Version |
| Monthly Rainfall (3B43 V6) Anomaly | JAVA_Version | Non_JAVA_Version |
| Inter-Comparison of Rainfall Climatology | JAVA_Version | Non_JAVA_Version |
| Monthly TMI rain, latent heat, cloud liquid water profiles (3A12 V6) | JAVA_Version | Non_JAVA_Version |
| Monthly Rainfall (3A25 V6) | JAVA_Version | Non_JAVA_Version |
Ground Observation Archives | ||
| Monthly Willmott and Matsuura Global Precipitation (1950 - 1999) | JAVA_Version | Non_JAVA_Version |
| Monthly GPCC Rainfall (1986 - Present, Monitoring Product) | JAVA_Version | Non_JAVA_Version |
Continued improvement of this online tool, and the production and dissemination of these data sets, depends on your (our users) informing us on how you have used this tool and these data. We are particularly interested in the value of this tool and these data sets to your research. Please send your comments to help-disc@listserv.gsfc.nasa.gov.
Please visit our other Giovanni Websites at the GES DISC:
How to properly acknowledge the GES-DISC DAAC when using Giovanni results in publications.
This Web site was generated by Giovanni, v
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