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Engineering studies related to the GEOS-C radar altimeterExperiment requirements, technical characteristics, and GEOS-C radar altimeter related analyses are discussed along with results of a study on engineering test data requirements. Statistical analyses related to determination of wave height resolution achievable as a function of system characteristics and averaging period are described, in addition to a discussion on the desirability of using computer procedures to compensate for altitude tracker time-jitter. Data processing considerations for the GEOS-C system are examined. An extensive analysis of the spatial filter effect is given and results of a computation of geoidal power spectral density, based on Skylab altimeter data, is displayed and interpreted in terms of projected GEOS-C random errors. This information is then used in deriving minimum-mean-square filter procedures for both geoid undulation and slope data. The characteristics of mean received waveforms as a function of off-nadir angle are used to obtain tracker bias as a function of sea state and pointing angle. The angle estimation process proposed by the GEOS-C hardware contractor is also investigated from a standpoint of achievable angular resolution.
Document ID
19740022786
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Miller, L. S. (Applied Science Associates, Inc. Apex, NC, United States)
Brown, G. S. (Applied Science Associates, Inc. Apex, NC, United States)
Date Acquired
September 3, 2013
Publication Date
May 1, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-CR-137462
Accession Number
74N30899
Funding Number(s)
CONTRACT_GRANT: NAS6-2307
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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