StreamPro ADCP Operation Manual - global site

StreamPro ADCP Operation ManualTable 10:Hex DigitBinaryByteFixed Leader Data Format (continued)FieldDescription15,16 8 Spare Undefined.17,18 9 #Bm / Numberof Beams19,20 10 WN / Numberof Cells21-24 11,12 WP / PingsPer Ensemble25-28 13,14 WS / DepthCell Length29-32 15,16 WF / Blankafter Transmit33,34 17 Signal ProcessingMode35,36 18 WC / Low CorrThresh37,38 19 cr# / No. codereps39,40 20 WG / %GdMinimum41-44 21,22 WE / ErrorVelocityThreshold45,4647,4849,50232425MinutesSecondsHundredthsContains the number of beams used to calculate velocity data(not physical beams). The StreamPro needs only three beamsto calculate water-current velocities. The fourth beam providesan error velocity that determines data validity. If only threebeams are available, the StreamPro does not make this validitycheck. Table 15, page 77 (Percent-Good Data Format) hasmore information.Contains the number of depth cells over which the StreamProcollects data (WN-command).Scaling: LSD = 1 depth cell; Range = 1 to 128 depth cellsContains the number of pings averaged together during a dataensemble (WP-command). If WP = 0, the StreamPro does notcollect the WD water-profile data. Note: The StreamPro automaticallyextends the ensemble interval (TE) if the product ofWP and time per ping (TP) is greater than TE (i.e., if WP x TP >TE).Scaling: LSD = 1 ping; Range = 0 to 16,384 pingsContains the length of one depth cell (WS-command).Scaling: LSD = 1 centimeter; Range = 1 to 6400 cm (210 feet)Contains the blanking distance used by the StreamPro to allowthe transmit circuits time to recover before the receive cyclebegins (WF-command).Scaling: LSD = 1 centimeter; Range = 0 to 9999 cm (328 feet)Contains the Signal Processing Mode. This field will always beset to 1.Contains the minimum threshold of correlation that water-profiledata can have to be considered good data (WC-command).Scaling: LSD = 1 count; Range = 0 to 255 countsContains the number of code repetitions in the transmit pulse.Scaling: LSD = 1 count; Range = 0 to 255 countsContains the minimum percentage of water-profiling pings in anensemble that must be considered good to output velocity data(WG-command).Scaling: LSD = 1 percent; Range = 1 to 100 percentThis field, initially set by the WE-command, contains the actualthreshold value used to flag water-current data as good or bad.If the error velocity value exceeds this threshold, the StreamProflags all four beams of the affected bin as bad.Scaling: LSD = 1 mm/s; Range = 0 to 5000 mm/sThese fields, set by the TP-command, contain the amount oftime between ping groups in the ensemble. NOTE: TheStreamPro automatically extends the ensemble interval (set byTE) if (WP x TP > TE).P/N 95B-6003-00 (February 2008) page 63