Appendix E 
Stationary Instrument Data 
This appendix includes information about the mounting, positioning, and 
naming of the DELILAH array instruments. It also provides details on the 
basic measurements taken at the Field Research Facility (FRF), and a 
methodology for processing the data. Day-by-day sensor status reports 
(changes in instrument height, orientation, etc.) were included based on the 
experiment notes of Dr. Peter Howd and Dr. Edward Thornton. Other factors 
such as biological growth, bent sensor mounts, or changing local depths have 
not been included. Data from the surf zone arrays were collected continuously 
except for the time required to change tapes. 
DELILAH Array 
Instruments 
The 19 instruments of the DELILAH array are shown in Figure El. Nine 
instrument packages form the primary cross-shore array of the DELILAH 
array (indicated by squares in Figure El). These nine gauges were provided 
by the Naval Postgraduate School. Ten additional current meters, provided by 
Scripps Institute of Oceanography, were installed to form three subarrays 
(indicated by circles in Figure E1). One longshore subarray located in the 
trough consisted of six current meters. The second longshore subarray was 
formed by five current meters seaward of the bar crest, labeled the crest 
subarray. The third subarray was a three-gauge cross-shore array over the bar, 
between the two longshore subarrays. 
Each primary cross-shore subarray instrument package included a small 
ball (Model 512) Marsh-McBirney electromagnetic current meter, a Paro- 
scientific pressure gauge (except instrument package 80), and a Setra strain- 
gauge pressure sensor. The Paroscientific gauge was connected to a thin 
copper tube that was buried in the bottom in order to isolate the orifice from 
the current flow. The Paroscientific gauge was designed to measure wave- 
induced setup while the strain gauge pressure sensors measured wave energy. 
After considerable analysis at the Naval Postgraduate School, it was decided 
Appendix E Stationary Instrument Data 
E1 
