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Analyzing altimeter artifacts: statistical properties of ocean waveforms

Analyzing altimeter artifacts: statistical properties of ocean waveforms
Analyzing altimeter artifacts: statistical properties of ocean waveforms
In this paper waveforms, that is, returns from the ocean surface, from a number of spaceborne radar altimeter instruments [European Remote-sensing Satellites (ERS-1 and -2), TOPEX, and Poseidon] are examined. This is the first paper to analyze waveform data from a number of altimeters in a consistent manner. Mean shapes and various statistical properties (bin-to-bin correlations, number of independent samples) were determined and the authors comment on their anomalies. The analyses were performed for data over the deep ocean, as that is the best understood surface. However, the determined functional characteristics of the individual altimeters are applicable to their operation over all surfaces. The implications of the existence of these anomalies for the retrieval of geophysical parameters from radar altimeter data are discussed. It is argued that the need for physically based theories, in order to understand radar altimeter returns from the ocean (or indeed any other) surface, implies a need for the engineering and software design of the instrument to be such as to avoid spurious anomalies in the waveforms.
ALTIMETERS, ANOMALIES, RADAR ALTIMETRY, WAVEFORMS
0739-0572
2074-2091
Quartly, G.D.
3d1e4e87-f001-4d18-b95f-9bca4db6ff9d
Srokosz, M.A.
f1701d3e-01b3-43d0-8993-9fd523032a79
McMillan, A.C.
a8a53ff4-00c0-48a8-b171-4ed5104912b6
Quartly, G.D.
3d1e4e87-f001-4d18-b95f-9bca4db6ff9d
Srokosz, M.A.
f1701d3e-01b3-43d0-8993-9fd523032a79
McMillan, A.C.
a8a53ff4-00c0-48a8-b171-4ed5104912b6

Quartly, G.D., Srokosz, M.A. and McMillan, A.C. (2001) Analyzing altimeter artifacts: statistical properties of ocean waveforms. Journal of Atmospheric and Oceanic Technology, 18 (12), 2074-2091. (doi:10.1175/1520-0426(2001)018<2074:AAASPO>2.0.CO;2).

Record type: Article

Abstract

In this paper waveforms, that is, returns from the ocean surface, from a number of spaceborne radar altimeter instruments [European Remote-sensing Satellites (ERS-1 and -2), TOPEX, and Poseidon] are examined. This is the first paper to analyze waveform data from a number of altimeters in a consistent manner. Mean shapes and various statistical properties (bin-to-bin correlations, number of independent samples) were determined and the authors comment on their anomalies. The analyses were performed for data over the deep ocean, as that is the best understood surface. However, the determined functional characteristics of the individual altimeters are applicable to their operation over all surfaces. The implications of the existence of these anomalies for the retrieval of geophysical parameters from radar altimeter data are discussed. It is argued that the need for physically based theories, in order to understand radar altimeter returns from the ocean (or indeed any other) surface, implies a need for the engineering and software design of the instrument to be such as to avoid spurious anomalies in the waveforms.

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Published date: 2001
Keywords: ALTIMETERS, ANOMALIES, RADAR ALTIMETRY, WAVEFORMS

Identifiers

Local EPrints ID: 5968
URI: http://eprints.soton.ac.uk/id/eprint/5968
ISSN: 0739-0572
PURE UUID: 75808bd1-6371-4774-9283-11ba411dc3d5

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Date deposited: 07 Jun 2004
Last modified: 08 Jan 2022 09:46

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Contributors

Author: G.D. Quartly
Author: M.A. Srokosz
Author: A.C. McMillan

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