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<br />Liquid Watl~r Content (g m-3) The following equations are used to determine Liquid Water Content. <br /> <br />v thy = A . (1SD - Tf) . (P . TAS)" <br /> <br />LWC <br /> <br />(10 . (VA - V thy)) <br />Lv + Cpw . (1SW - Tf) . L . D . TAS <br />1000 .0 <br /> <br />Where: <br />V dry = The empirically derived dry Voltage. <br />VA = Voltage output from sensor (Volts) <br />A = 1.962 x lO-s <br />TSD(Dry Sensor temperature) = 190.0 CC) <br />TSW(Water evaporation temperature) = 90.0 CC) <br />Tf= Ambient Free Air Temperature from Above CC) <br />P = Static Pressure from Above (mb) <br />T AS = True Airspeed from Above (mb) <br />x = 0.52 <br />Lv(Latent heat of vaporization) = 2.501 x 106 (J kg-I) <br />Cpw(Specific heat) = 4218.0 (J deg-I kg-I) <br />L = Length of the sensor element (m) <br />D = Diameter of the sensor element (m) <br /> <br />SF6 concentration (pptv) <br /> <br />SF * (volts - zero offset) <br /> <br />NOTE: Scaling factors (SF) were determined during calibrations. <br /> <br />After the field study, final values for the zero offsets, intercepts, and scaling factors were <br />determined and entered into the processing program, and data were reprocessed using those final <br />values. One-second-averaged files were again created, then those files were processed further by a <br />program that provides additional averaging while checking for data validity (i.e., data from sampling <br />periods were checked to assure that the values were reasonable and were within expected ranges; see <br />Table 3.). <br /> <br />18 <br />