Measuring and Understanding Coastal Processes (1989) / Chapter Skim
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5. Data
5. Data
Pages 87-94
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From page 87... ...
These include calibration and standards, quality control, data processing, analysis, and archiving. In some cases there are quite formal programs for these procedures for example, routine weather observations and ocean hydrographic data.
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From page 88... ...
QUALITY CONTROL Quality control is fundamental to good science and engineering. Poor data can lead to wrong conclusions and bad designs.
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From page 89... ...
For operational data, there are standardized procedures from the time the data are collected until they are archived. For research data there may be no standard quality control procedure and the data may never be formally archived.
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From page 90... ...
Quality control is a procedure that is exercised at each step along the way to include experimental design, sensor selection, sensor calibration, telemetry, recording, processing, and archiving. The evolution of digital electronics, sensor technology, telemetry, and recording systems has enhanced our capability to exercise quality control, in some cases in a highly automated fashion.
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From page 91... ...
There is a need to develop a comprehensive historical quality-controlled data base to support engineering design and modeling. There Is a need to unprove real-t~me acquisition and quality control of coastal engineering data.
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From page 92... ...
The in situ direct measurements from fixed sensors can give added information on currents, pressure, and other properties within the water column, at sampling rates that are Innited only by the inherent time constant of the sensor and of the recording and/or telemetry system. When recorded at suitable sampling rates at a single location, pressure or sea surface elevation data can quantify surface waves (but not their direction)
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From page 93... ...
Basically, the methodology is the following: Suppose some auxiliary measurements of wind velocity are made in the nearshore zone to supplement those made at land stations and those from offshore meteorological buoys and ships at sea. It is well known that wind velocity and sea-level atmospheric pressure gradients are related in a deterministic manner and hence, the assimilation of the additional nearshore wind velocity measurements with the barometric pressure and wind information available from NWS can
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From page 94... ...
current meters at a few locations, Lagrangian drifted data, and sea-level and satellitederived ~rnagery of surface temperatures all of which are related to the stream-function. The methodology, when carried out objectively, requires representation of the unknown stream-function.
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