Table 1 



Gauge Locations 



Site 



Name 



Latitude 



Longitude 



Gauges 



A 



Offshore 



29° 05.462 'N 



80 ° 54.620' W 



DWG1INT1 



B 



Ebb Shoal 



29° 04.565' N 



80 ° 53.902' W 



DWG1EBB1 



ADCPEBB1 



C 



Inlet Throat 



29° 04 605' N 



80 ° 54.489' W 



DWG10TH1 



ADCPOTH1 



D 



Coast Guard 



29° 03.776' N 



80 ° 54.909' W 



VITLBAY3 



E 



River North 



29° 05.453' N 



80 ° 56.332 W 



SPRSBAY1 



F 



River West 



29° 03.944' N 



80 ° 56.322' W 



SPRSBAY2 



G 



River South 



29° 02.266' N 



80 ° 54.299' W 



SPRSBAY3 



H 



Battelle 



29° 04.933' N 



80° 55.581' W 



Meteorology 



J 



Data Trailer 



29° 03.868' N 



80 ° 54.902' W 



Barometer 



The data were received by a WES computer located in the Prototype Measurement 

 and Analysis Branch (PMAB), Coastal and Hydraulics Laboratory (CHL), using a 

 standard data acquisition, analysis, and storage routine (McKinney and Howell 1996). 

 The entire system was designed to operate automatically and to provide high 

 reliability. Extensive automated checks were incorporated to determine if the system 

 was operating normally. If a problem was detected, automated E-mail warning 

 messages were sent. Furthermore, the status of various systems in the on-site data 

 collection trailer could be queried from WES. For a further description of this system, 

 see Howell (1996). 



Wave Measurements 



Continuous, long-term wave measurements were made from 1995 to 1997 using 

 three DWGl's, a gauge developed by PMAB. Each gauge consisted of three 

 Paroscientific Digiquartz piezo-electric (Paros) pressure sensors mounted on a trawler- 

 resistant seafloor pod in an equilateral triangle distribution. These gauges performed 

 limited onboard data processing, then transmitted the information to shore through a 

 cable, which also supplied power to the systems. The DWG1 is further described in 

 Howell (1992). In all cases, pod orientation (necessary to determine wave direction) 

 was determined by divers following deployment and checked during retrieval. 

 Datasonic acoustic releasing transponders were used to assist in locating and recovering 

 the equipment pods. 



The output wave parameters were derived from a two-dimensional (2-D) power density 

 spectrum of the sea surface using spectral analysis of the sensors' output and linear wave 

 theory. The raw DWG1 wave data were collected at 5 Hz for 1 hr (17,000+ data points 



Chapter 2 Instrumentation and Procedures 



