APPENDIX A: WAVERIDER BUOY CALIBRATION INFORMATION 



1. This appendix presents the calibration information required for the 

 two Waverider buoy gages used during 1984 at the 3-km offshore installation. 

 Table Al lists the operational dates of each gage as well as the predeployment 

 and postdeployment calibration dates. 



Table Al 



Operational/Calibration Dates for the Waverider Buoys 



Used at the FRF During 1984 



Serial Number 

 67715-7 



66967 

 67715-7 



Operational 



29 August 1983- 

 31 December 1983 



1 January 1984- 

 5 March 1984 



5 March 1984- 



14 November 1984 



5 December 1984- 

 31 December 1984 



Calibrated 



1 December 1982 

 20 March 1984 



1 December 1982 

 20 March 1984 



1 December 1982 



20 March 1984 



2. The buoys were calibrated either at the National Oceanic and Atmos- 

 pheric Administration (NOAA) /Engineering Support Office (ESO) , Wave Instrument 

 Facility (Ribe 1981),* or at Adamo Rupp Associates (ARA) in Solana Beach, 

 Calif. Calibration results are presented in terms of two factors: (a) the 

 Datawell-specified decrease in electronic sensitivity as a function of oscil- 

 lation period error, and (b) a difference error based on deviations from 



(a) found during the calibrations. The corrections and their application are 

 discussed below. 



Datawell-Predicted Decrease in Sensitivity Error (DW) 



3. Waverider buoy sensitivity /A/ for buoy electronics decreases with 

 increasing period T of sinusoidal vertical motion according to Datawell as 

 follows: 



* References cited in this appendix are included in the References at the end 

 of the main text. 



Al 



