122 - 



in temperature in the present DPG configuration, (Section V.C.6). 

 The difference could indicate slanted installation of the instrument. 

 The changes in mean voltages suggest that arms 2 and 3 could be 

 tilted 9.7 and 11.8 above the horizontal, respectively; (from 

 Equation 4.34) . This could be confirmed by comparison with dPl and 

 dP4; however, neither of these channels show a clear trend in the 

 change of mean value between land and sea. 



A portion of the time record of one data set is shown in 

 Figure VI-5. The mean value has been removed from each record and 

 the signs of dPl and dP2 have been reversed. The dPl signals have 

 been multiplied by the channel 1 calibration factor of 1.65. The 





FI GURE VI-5; Portion of time record from DPG signals . 



o1^ lb .00 2b.oo 3b.oo ^ 4b .00 5b.oo ib 



TIME (seconds ) 



