Sonic Anemometer Tilt Coefficients during CASES97 Site Sonic Fit Period offset(cm/s) lean(deg) leanaz(deg) 1 Gill 28 Apr - 22 May 4.2 0.81 160 2 Gill 28 Apr - 22 May 5.5 1.27 100 3 ATI 17 Apr - 22 May 5.4 2.12 -179 4 ATI 18 Apr - 20 May 5.1 1.62 -138 5 ATI 18 Apr - 22 May 0.3 1.08 -33 6 Gill 28 Apr - 22 May 0.2 1.00 178 7 ATI 15 Apr - 22 May -3.6 1.85 -165 8 ATI 16 Apr - 22 May -2.9 0.52 149 8 CSAT 17 Apr - 22 May -2.2 0.8 -177