SMMR By Prabhakara Data Set Document

The Prabhakara SMMR Atmospheric Liquid Water files were generated by Dr. Prabhakara Cuddapah at the Goddard Space Flight Center (GSFC) using SMMR Antenna Temperatures. A discussion of the SMMR Antenna Temperatures is available from the Langley Distributed Active Archive Center (DAAC).

This document supports two data sets by Prabhakara and they are:

SMMR_ALW_PRABHAKARA
SMMR_IWV_PRABHAKARA

Table of Contents:

1. Data Set Overview:

Data Set Identification:

SMMR_ALW_PRABHAKARA:	Scanning Multichannel Microwave Radiometer (SMMR) Monthly Mean Atmospheric Liquid Water (ALW) By Prabhakara (SMMR_ALW_PRABHAKARA)
SMMR_IWV_PRABHAKARA:	Scanning Multichannel Microwave Radiometer (SMMR) Monthly Mean Integrated WaterVapor (IWV) By Prabhakara (SMMR_IWV_PRABHAKARA)

Data Set Introduction:

SMMR_ALW_PRABHAKARA:
Each Atmospheric Liquid Water (ALW) file contains one month of 3 degree by 5 degree gridded mean liquid water. Each element of data is in units of mg/cm2. The data spans the period from February 1979 to May 1984.

SMMR_IWV_PRABHAKARA:
Each Integrated Water Vapor (IWV) file contains one month of 3 degree by 5 degree gridded mean water vapor. A scale factor of 0.1 must be applied to convert the data into units of g/cm2. The data spans the period from October 1979 to September 1983.

Objective/Purpose:

Summary of Parameters:

Discussion:

Related Data Sets:

2. Investigator(s):

Investigator(s) Name and Title:

Title of Investigation:

Contact Information:

Investigator Information:
Cuddapah Prabhakara
NASA/GSFC
Mail Stop 913.0
Greenbelt, MD 20771
USA
Phone: (301) 286-5390
E-mail: cuddapah@climate.gsfc.nasa.gov

Technical Contact:
Michael Goodman
Global Hydrology and Climate Center
Marshall DAAC User Services
NASA Marshall Space Flight Center
977 Explorer Blvd.
Huntsville, AL 35806
USA
Phone: (205) 922-5890
E-mail: michael.goodman@msfc.nasa.gov

3. Theory of Measurements:

4. Equipment:

Sensor/Instrument Description:

Collection Environment:

Source/Platform:

Source/Platform Mission Objectives:

Key Variables:

Principles of Operation:

Sensor/Instrument Measurement Geometry:

Manufacturer of Sensor/Instrument:

Frequency of Calibration:

Other Calibration Information:

5. Data Acquisition Methods:

Spatial Characteristics:

Spatial Coverage:

Data Set	Min Lat	Max Lat	Min Lon	Max Lon
SMMR_ALW_PRABHAKARA	-48.00	48.00	-180.00	180.00
SMMR_IWV_PRABHAKARA	-75.00	75.00	-180.00	180.00

Spatial Coverage Map:

Spatial Resolution:

Projection:

Grid Description:

Temporal Characteristics:

Temporal Coverage:

Data Set	Begin Date	End Date
SMMR_ALW_PRABHAKARA	02-01-1979	05-31-1984
SMMR_IWV_PRABHAKARA	10-01-1979	09-30-1983

Temporal Coverage Map:

Temporal Resolution:

Data Characteristics:

Parameter/Variable:

Variable Description/Definition:

8. Data Organization:

Data Granularity:

A general description of data granularity as it applies to the IMS appears in the EOSDIS Glossary.

Data Format:

9. Data Manipulations:

Formulae:

Derivation Techniques and Algorithms:

Data Processing Sequence:

Processing Steps:

Processing Changes:

Calculations:

Special Corrections/Adjustments:

Calculated Variables:

Data Validation by Source:

Confidence Level/Accuracy Judgement:

Measurement Error for Parameters:

Additional Quality Assessments:

Data Verification by Data Center:

11. Notes:

Limitations of the Data:

Known Problems with the Data:

Usage Guidance:

Any Other Relevant Information about the Study:

12. Application of the Data Set:

13. Future Modifications and Plans:

14. Software:

Software Description:

Software Access:

If you have any questions, please contact the Langley DAAC. Contact information is provided in this document.

15. Data Access:

Contact Information:

Langley DAAC User and Data Services Office
NASA Langley Research Center
Mail Stop 157D
Hampton, Virginia 23681-2199
USA
Telephone: (757) 864-8656
FAX: (757) 864-8807
E-mail: larc@eos.nasa.gov

Data Center Identification:

Langley DAAC User and Data Services Office
NASA Langley Research Center
Mail Stop 157D
Hampton, Virginia 23681-2199
USA
Telephone: (757) 864-8656
FAX: (757) 864-8807
E-mail: larc@eos.nasa.gov

Procedures for Obtaining Data:

The Langley DAAC Information Management System (IMS) is an on-line system that features a graphical user interface (GUI) that allows to query the Langley DAAC dataset holdings, to view pre-generated browse products, and to order specific data products.

The Langley DAAC User and Data Services staff provides technical and operational support for users ordering data.

Langley DAAC User and Data Services Office
NASA Langley Research Center
Mail Stop 157D
Hampton, Virginia 23681-2199
USA
Telephone: (757) 864-8656
FAX: (757) 864-8807
E-mail: larc@eos.nasa.gov
URL: http://eosweb.larc.nasa.gov

Data Center Status/Plans:

The Langley DAAC will continue to archive this data. There are no plans to reprocess.

16. Output Products and Availability:

17. References:

Prabhakara, C., H. D. Chang, and T. C. Chang, 1982: Remote Sensing of Precipitable Water over the Oceans from Nimbus 7 Microwave Measurements. J. Appl. Meteor., Vol. 21, No. 1, 59-68.

Prabhakara, C., G. Dalu, J. J. Nucciarone, and G. L. Liberti, 1992: Rainfall over Oceans: Remote Sensing from Satellite Microwave Radiometers. Meteorol, Atmos. Phys., 47, 177-199.

18. Glossary of Terms:

19. List of Acronyms:

20. Document Information:

Document Revision Date:: October 07, 1996; May 29, 1997; November 24, 1997
Document Review Date:: ...
Document ID:: ...(currently leave this blank)
Citation:: ...
Document Curator:: Langley DAAC User and Data Services Office
Telephone: (757) 864-8656
FAX: (757) 864-8807
E-mail: larc@eos.nasa.gov
Document URL:: http://eosweb.larc.nasa.gov/GUIDE/dataset_documents/base_smmr_prabhakara_dataset.html

Scanning Multichannel Microwave Radiometer (SMMR) By Prabhakara Langley DAAC Data Set Document

Summary:

Table of Contents: