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TRMM Monthly 1 x 1 Degree SSM/I Rain Data 3A46

Data Access for

3A46: http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?tree=project&project=TRMM&dataGroup=Gridded&dataset=3A46:%20Monthly%201%20x%201%20degree%20SSM/I%20Rain&version=002

Contents of the TRMM Monthly 1 x 1 Degree SSM/I Rain Data 3A46

Summary

This document provides basic information on 3A46, monthly Special Sensor Microwave/Imager (SSM/I) data averaged over 1° x 1° grid boxes and one month.

Data Flow Description

The data flow of all products are shown in Satellite Algorithm Flow Diagram.

Data Set Description

Data Characteristics

Temporal Coverage Start Date: 1998-01-01; Stop Date: -
Geographic Coverage Latitude: 90°S - 90°N; Longitude:180°W - 180°E
Temporal Resolution Monthly
Horizontal Resolution 1° x 1°
Average File Size ~300 KB (uncompressed)
File Type HDF


Data Format Structure

The following table summarizes the contents and structure of the TRMM Monthly 1 x 1 Degree SSM/I Rain Data (3A46) product. Further information can be found in Volume 4 of the "File Specifications for TSDIS Products - Level 2 and Level 3" .

Data Format Structure for 3A46, TRMM Monthly 1 x 1 Degree SSM/I Rain Data
Name Type Record
Size
(byte)
Dim Size
(# of Records)
Scaled
by
Range Unit Description
ECS Core Metadata Char Attribute 10,000  - - - - ECS Core Metadata
PS Metadata Char Attribute 10,000  - - - - Product Specific Metadata
GridStructure Char Attribute 5,000  - - - - GridStructure gives the specification of the geometry of the grids.
SSMIdata Float SDS 180*360*2 - 0.0 ~ 100.0
(1st variable)

0.0 ~ 1,000,000,000.0
(2nd variable)
mm hr-1 SSM/I data averaged over 1° x 1° grid boxes and one month. The first variable is Precipitation Rate (mm/hr); the range is 0 to 100. The second variable is Number of Observations; the range is 0 to one billion.
Note: The grids in SSM/I data are different than the standard TSDIS grids in the following ways:
      1)   the longitude dimension precedes the latitude dimension;
      2)   the longitude index begins at the Greenwich meridian;
      3)   the latitude index begins at the northernmost row;
      4)   the latitude range is -90 to +90;
      5)   Missing data are given the value of -9999.
TRMM 3A46 can be accessed and ordered from the Goddard DAAC's TRMM Data Search and Order System at http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?tree=project&project=TRMM&dataGroup=Gridded&dataset=3A46:%20Monthly%201%20x%201%20degree%20SSM/I%20Rain&version=002

Appendix

 
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Last updated: Mar 18, 2013 04:34 PM ET
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