Barry Lesht Environmental Research Division Argonne National Laboratory 9700 S. Cass Ave. Argonne, IL 60439 Phone: 630/252-4208 FAX: 630/252-2959 Email: bmlesht@anl.gov ARGONNE TRIPOD DATA 4/2/98 - 4/30/98 STATION 98-TRI, LAT 42 39.90 LON 87 44.89, OP No. N1998092.01 Explanation of Columns in the Data Set BURST Sequential number of data burst MON Calendar month (local time = CST) DY Calendar day (local time = CST) TIME Local time (CST) JULDATE Ordinal fractional day (UTC) of beginning of burst E Eastward component of mean horizontal current N Northward component of mean horizontal current SPD Mean horizontal current speed WOVm SQRT(2*(sigU**2+sigV**2)) - Estimated wave orbital velocity sigU and sigV are standard deviations of horizontal current components during the burst TEMP Water temperature DEPTH Water depth (net of average atmospheric pressure) SIGDP Standard deviation of variations in water depth during burst WHT Range of variations in water depth during burst WOVp Wave orbital velocity estimated from pressure measurement by using linear wave theory TSM Estimated total suspended material from Transmissometer1 TSM = 2*(ATTN1-0.5) ATTN1 Optical attenuation - transmissometer 1 CVX1 Coefficient of variation of transmissometer signal ATTN2 Optical attenuation - transmissometer 2 CVX2 Coefficient of variation of transmissometer signal Fundamental Data Sources Parameter Sensor Serial Number HeightAboveBottom Current Velocity Marsh-McBirney512 282 74 cm Transmissometer1 SeaTech (25cm) 24 93 cm Transmissometer2 SeaTech ( 5cm) 327 93 cm Pressure Paroscientific 6486 73 cm Temperature AnalogDevices 204 95 cm After a two-minute warm-up period, all sensors were sampled at 4Hz for 5 minutes every half hour. Means, standard deviations, and covariances of the basic data were recorded. Tripod orientation (compass, tilts) were recorded once per day.