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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=002Contents of the TRMM Monthly 1 x 1 Degree SSM/I Rain Data 3A46 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. The data flow of all products are shown in Satellite Algorithm Flow Diagram. 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 | 4 | 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://disc.sci.gsfc.nasa.gov/data/datapool/TRMM_DP/01_Data_Products/02_Gridded/05_Monthly_Ssmi_Rain_3A_46/.
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Atmos Composition
