The microbarograph was manufactured by Weathertronics Incorporated, Sacra- 

 mento, Calif. 



24. The microbarograph was compared daily with the NWS's aneroid barom- 

 eter, and adjustments were made as necessary. Maintenance of the microbaro- 

 graph consisted of inking the pen, changing the chart paper, and winding the 

 clock every 7 days. During the summer, a meteorologist from the NWS (Norfolk, 

 Va.) checked and verified the operation of the NWS barometer. 



Rain gage 



25. A 30-cm weighing rain gage manufactured by the Belfort Instrument 

 Company, Baltimore, Md., used to measure the daily amount of precipitation, 

 was located near the instrument shelter, 46 m behind the dune. The manufac- 

 turer's specifications indicated that the instrument's accuracy was ±0.5 per- 

 cent for precipitation amounts less than 15 cm and ±1.0 percent for amounts 

 above 15 cm. 



26. A 15-cm-capacity "true check" clear plastic rain gage with a 

 0.025-cm resolution, manufactured by the Edwards Manufacturing Company, Albert 

 Lea, Minn., was used to monitor the performance of the weighing rain gage. 

 This gage, located near the weighing gage, was checked daily; very few dis- 

 crepancies were identified thoughout the year. 



Wind speed and direction 



27. Winds were measured from the top of the laboratory building at 

 an elevation of 19.1 m (Figure 2) by using a Skyvane Model W102P anemometer 

 manufactured by the Weather Measure Corporation, Sacramento, Calif. Wind 

 speed and direction data were incorporated into the automated data collec- 

 tion and analysis program, and were also collected continuously on a strip- 

 chart recorder. The Weather Measure Corporation specifies an accuracy of 

 ±0.45 m/sec below 13 m/sec and ±3 percent at speeds above 13 ra/sec, with a 

 threshold of 0.9 m/sec. Wind direction accuracy is ±2 deg with a resolution 

 of less than 1 deg. The anemometer was calibrated semiannually at the 

 National Bureau of Standards in Gaithersburg, Md., and was within the manu- 

 facturer's specifications. 



Wave Gages 



Baylor wave staff gages 



28. Two parallel cable inductance wave gages, manufactured by the 

 Baylor Company, Houston, Tex., were mounted on the FRF pier: gage 615 at 



18 



