NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Geolocation and Pointing Accuracy Analysis for the WindSat SensorGeolocation and pointing accuracy analyses of the WindSat flight data are presented. The two topics were intertwined in the flight data analysis and will be addressed together. WindSat has no unusual geolocation requirements relative to other sensors, but its beam pointing knowledge accuracy is especially critical to support accurate polarimetric radiometry. Pointing accuracy was improved and verified using geolocation analysis in conjunction with scan bias analysis. nvo methods were needed to properly identify and differentiate between data time tagging and pointing knowledge errors. Matchups comparing coastlines indicated in imagery data with their known geographic locations were used to identify geolocation errors. These coastline matchups showed possible pointing errors with ambiguities as to the true source of the errors. Scan bias analysis of U, the third Stokes parameter, and of vertical and horizontal polarizations provided measurement of pointing offsets resolving ambiguities in the coastline matchup analysis. Several geolocation and pointing bias sources were incfementally eliminated resulting in pointing knowledge and geolocation accuracy that met all design requirements.
Document ID
20090001332
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Meissner, Thomas
(Remote Sensing Systems, Inc. Santa Rosa, CA, United States)
Wentz, Frank J.
(Remote Sensing Systems, Inc. Santa Rosa, CA, United States)
Purdy, William E.
(Purdy Engineering, Inc. Poolesville, MD, United States)
Gaiser, Peter W.
(Naval Research Lab. Washington, DC, United States)
Poe, Gene
(Institute of Electrical and Electronics Engineers Washington, DC, United States)
Uliana, Enzo A.
(Interferometrics, Inc. Chantilly, VA, United States)
Date Acquired
August 24, 2013
Publication Date
March 1, 2006
Publication Information
Publication: IEEE Transactions on Geoscience and Remote Sensing
Publisher: Institute of Electrical and Electronics Engineers
Volume: 44
Issue: 3
Subject Category
Geosciences (General)
Funding Number(s)
CONTRACT_GRANT: NNH06CC29C
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available