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of the arms with respect to one another might be considered. The 

 angle between arms might be varied to "tune" the DPG to the incident 

 wave field — much the same as a directional antenna. Changes in arm 

 orientation could also permit the estimation of higher order 

 directional Fourier coefficients, (see Appendix E) . 



In future versions of the DPG system, wave data could be 

 transmitted to ship or shore by telemetry — eliminating difficult 

 cable installations. Data might also be integrated in- situ and 

 reported in concise segments by telemetry or on tape. Present 

 coastal field measurements are often made over long periods of time, 

 where the results of such measurements represent coastal processes 

 that are essentially integrated over time. In such cases, specific 

 hour-by-hour wave data may not be necessary or even desirable. 

 Concise, integrated wave information is just as useful. Software 

 capability on site with the DPG could be developed to integrate large 

 amounts of wave data and report one or two numbers (say, measures of 

 P|5 or Sxy) to characterize the wave climate over time, (Robert Dean, 

 personal conversation) . 



A technique has also been considered to directly measure 

 water surface curvature using differential pressure gauges. This 

 measurement technique could be developed and evaluated in the hope of 

 accurately developing higher orders of directional Fourier 

 coefficients from directly measured data. 



