#DATA_DATES: 1992/10/27 23:36:00 --- to --- 1992/12/07 21:30:00 #LON_RANGE: 144.58 E --- to --- 157.93 W #LAT_RANGE: 1.84 S --- to --- 21.27 N #DEPTH_RANGE: 14 --- to --- 476 m #SAC_CRUISE_ID: 00004 #PLATFORM_NAME: R/V Moana Wave #PRINCIPAL_INVESTIGATOR_NAME: Mike Gregg #PI_INSTITUTION: University of Washington #PI_COUNTRY: USA #PROJECT: TOGA COARE #CRUISE_NAME: mw9218 #PORTS: Honolulu to Guam #GEOGRAPHIC_REGION: Central and Western Tropical Pacific #PROCESSED_BY: University of Hawaii #NAVIGATION: GPS #QUALITY_NAV: #GENERAL_INFORMATION: CRUISE NOTES CHIEF SCIENTIST ON SHIP : Gregg INSTITUTE : University of Washington COUNTRY : USA SIGNIFICANT DATA GAPS : SPECIAL SHIP TRACK PATTERNS : 22 day time series at 2S, 160E COMMENTS : ADCP INSTRUMENTATION MANUFACTURER : RD Instruments (RDI) HARDWARE MODEL : RD-VM150 SERIAL NUMBERS : FIRMWARE VERSION : 17.10 or 17.07 ? TRANSMIT FREQUENCY : 153 kHz TRANSDUCER CONFIGURATION : JANUS CONCAVE ACOUSTIC BEAM WIDTH : TRANSDUCER BEAM ANGLE : 30 deg. COMMENTS : ADCP INSTALLATION METHOD/DESCRIPTION OF THE ATTACHMENT TO THE HULL : A streamlined fairing is welded to the bottom of the hull. The fairing extends about 18 inches below the hull. There are two wells in the fairing. The ADCP transducer is mounted on a top-hat shaped carrier, the rim of which is bolted onto the top of the well just above the level of the hull inside the ship. The bottom of the transducer is slightly above the level of the bottom of the fairing, so that a cover plate can be bolted to the bottom of the fairing when the transducer is to be removed from the ship. LOCATION/DEPTH ON HULL : Nominally 4 m. REPEATABLE ATTACHMENT : YES DATE OF MOST RECENT ATTACH. : ? ACOUSTIC WINDOW : NO COMMENTS : ADCP INSTRUMENT CONFIGURATION DEPTH RANGE : 20 - 476 m (bin centers) BIN LENGTH : 8 m NUMBER OF BINS : 58 TRANSMIT PULSE LENGTH : 16 m BLANKING INTERVAL : 4 m ENSEMBLE AVERAGING INTERVAL : 300 s SOUND SPEED CALCULATION : function of temp at transducer BOTTOM TRACKING : NO DIRECT COMMANDS : "FH00001" "E0005020099" "B009001" COMMENTS : ADCP DATA ACQUISITION SYSTEM SOFTWARE DEVELOPERS : RDI SOFTWARE VERSIONS : DAS 2.48 DATA LOGGER, MAKE/MODEL : HP Vectra (8 Mhz 286) ADCP/LOGGER COMMUNICATION : HPIB USER BUFFER VERSION : UH user exit "UE3", 2240 buffer version CLOCK : PC clock; reset if drift > 2 sec from GPS clock COMMENTS : SHIP HEADING INSTRUMENT MAKE/MODEL : Sperry Mark 37 mod 0 gyrocompass SYNCHRO OR STEPPER : synchro SYNCHRO RATIO : 1:1 COMPENSATION APPLIED : GPS ATTITUDE SYSTEM : YES: UH dual MX4200D system LOCATION OF ANTENNAS : starboard, roughly midship, 2.9754 m baseline distance between atennas RIGID ATTACHMENT : NO - antennas within PVC tubing; entire setup subject to minor swaying LOGGING RATE : 1 per sec ANCILLARY MEASUREMENTS SURFACE TEMP AND SALINITY : thermistor at transducer; none for salinity PITCH/ROLL MEASUREMENTS : none HYDRO CAST MEASUREMENTS : yes BIOMASS DETERMINATION : no DATE OF LAST CALIBRATION : never calibrated for amplitude CALIBRATION COEFFICIENTS : BEAM-AVERAGED AGC AVAILABLE?: < YES > CALIBRATION NET TOWS? : < NO > COMMENTS : ADCP DATA PROCESSING/EDITING PERSONNEL IN CHARGE : E.Firing DATE OF PROCESSING : July 1993 SOUND SPEED CORRECTIONS : Applied using transducer temperature NOTABLE SCATTERING LAYERS : COMMENTS : NAVIGATION TRANSIT : NO GPS : YES MAKE/MODEL : Magnavox MX4200 SELECTIVE AVAILABILITY : YES P-CODE : NO DIFFERENTIAL : no SAMPLE INTERVAL : 1 per sec LOCATION OF ANTENNA RELATIVE TO TRANSDUCER : rough estimate- 16 m forward, 3 m to stbd TIME OBTAINED RELATIVE TO START/END OF ENSEMBLE : start and end AVERAGING/EDITING APPLIED : ensemble position is average of end of present ensemble and start of following ensemble LOGGED WITH ADCP DATA : YES - user exit program LOGGED INDEPENDENTLY : YES - GPS attitude system records fixes and raw data from 2 receivers at 1 Hz COMMENTS : CALIBRATION GYROCOMPASS CORRECTION : YES, profile-by-profile-rotation based on the gps HOFS (heading offsets) BOTTOM TRACK METHOD :NO WATER TRACK METHOD :NO constant rotation based on the HOT-40, HOT-41's constant values. FINAL SELECTION : AMPLITUDE= 0.998600 PHASE= -1.101100 COMMENTS : NAVIGATION CALCULATION NAVIGATION USED : gps REFERENCE LAYER DEPTH RANGE : bins 5 - 20 FILTERING METHOD FOR SMOOTHING REFERENCE LAYER VELOCITY (FORM/WIDTH) :a Blackman window function of width T: w(t) = 0.42 - 0.5 * cos(2 * pi *t / T) + 0.08 * cos(4 * pi * t / T). filter_hwidth= 0.0208333 /* half an hour */ FINALIZED SHIP VEL/POSITIONS STORED IN DATABASE : YES COMMENTS : GENERAL_ASSESSMENT : ON-STATION VS. UNDERWAY : good VECTOR, CONTOUR, STICK PLOTS: good COMMENTS : data quality good REFERENCES :