CRUISE DATES: 1989/10/17 to 1989/10/20 DATABASE NAME: 00043 SHIP NAME: Moana Wave CRUISE NAME(S): mw8913, hot011 PORTS: Honolulu to Honolulu CHIEF SCIENTIST: S.Chiswell INSTRUMENT: nb150 #== Block Footer ==== #DATA_DATES: 1989/10/17 04:43:00 --- to --- 1989/10/20 15:52:00 #LON_RANGE: 158.45 W --- to --- 157.92 W #LAT_RANGE: 21.25 N --- to --- 22.90 N #DEPTH_RANGE: 20 --- to --- 476 m #SAC_CRUISE_ID: 00043 #PLATFORM_NAME: R/V Moana Wave #PRINCIPAL_INVESTIGATOR_NAME: S.Chiswell,E.Firing,D.Karl,R.Lukas,C.Winn #PI_INSTITUTION: University of Hawaii at Manoa #PI_COUNTRY: USA #PROJECT: Hawaii Ocean Time-series (JGOFS, WOCE (time-series)) #CRUISE_NAME: ship_tag=mw8913 woce_tag=PRS02,HOT011 EXPOCODE=32MW011_1 #PORTS: Honolulu to Honolulu #GEOGRAPHIC_REGION: Hawaiian Islands, North Central Pacific #PROCESSED_BY: University of Hawaii at Manoa #NAVIGATION: GPS and Transit #QUALITY_NAV: good #GENERAL_INFORMATION: CRUISE NOTES CHIEF SCIENTIST ON SHIP : S.Chiswell INSTITUTE : University of Hawaii at Manoa COUNTRY : USA SIGNIFICANT DATA GAPS : none SPECIAL SHIP TRACK PATTERNS : To HOT site and back COMMENTS : LENGTH OF LEG INFORMATION: +++++++++++++++++++++++++++++++++++++++++++++++++++++++ Northbound On-Station Southbound (number of days) -------------------------------------------------------------- HOT-11 0.5 2.65 0.5 ADCP INSTRUMENTATION MANUFACTURER : RDI HARDWARE MODEL : VM-150 SERIAL NUMBERS : FIRMWARE VERSION : 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 to 476 m BIN LENGTH : 8 m NUMBER OF BINS : 58 TRANSMIT PULSE LENGTH : 16 m BLANKING INTERVAL : 4 m ENSEMBLE AVERAGING INTERVAL : 5 minute SOUND SPEED CALCULATION : function of transducer temperature BOTTOM TRACKING : none DIRECT COMMANDS : COMMENTS : ADCP DATA ACQUISITION SYSTEM SOFTWARE DEVELOPERS : SOFTWARE VERSIONS : DATA LOGGER, MAKE/MODEL : ADCP/LOGGER COMMUNICATION : USER BUFFER VERSION : 1280_type 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 : LOCATION OF ANTENNAS : RIGID ATTACHMENT : LOGGING RATE : ANCILLARY MEASUREMENTS SURFACE TEMP AND SALINITY : yes PITCH/ROLL MEASUREMENTS : no HYDRO CAST MEASUREMENTS : yes BIOMASS DETERMINATION : no DATE OF LAST CALIBRATION : CALIBRATION COEFFICIENTS : BEAM-AVERAGED AGC AVAILABLE?: CALIBRATION NET TOWS? : COMMENTS : ADCP DATA PROCESSING/EDITING PERSONNEL IN CHARGE : E.Firing,W.Zhu,J.Ranada DATE OF PROCESSING : NOTABLE SCATTERING LAYERS : COMMENTS : some bottom interference was flagged; a few bad bins were also flagged; wire interference removed NAVIGATION TRANSIT : YES MAKE/MODEL : Magnavox receivers 1105 & 1157 models, discrete, 2-channel LOGGED WITH ADCP DATA : no COMMENTS : screened for suitable elevation and other quality parameters GPS : YES MAKE/MODEL : Magnavox receivers 1105 & 1157 models, Trimble 4000A model SELECTIVE AVAILABILITY : yes LOCATION OF ANTENNA RELATIVE TO TRANSDUCER : rough estimate- 16 m forward, 3 m to stbd TIME OBTAINED RELATIVE TO START/END OF ENSEMBLE : end of ensemble AVERAGING/EDITING APPLIED : hand-edited for outliers LOGGED WITH ADCP DATA : YES with user buffer 1280 LOGGED INDEPENDENTLY : Yes by STAGS COMMENTS : lots of gaps CALIBRATION GYROCOMPASS CORRECTION : No BOTTOM TRACK METHOD : Yes, but limited WATER TRACK METHOD : YES FINAL SELECTION : amplitude = 1.008 angle_0 = 0.2 COMMENTS : The orientation of the transducer relative to the gyro compass and an amplitude correction factor for the ADCP were determined by standard calibration procedures (Joyce, 1989; Pollard and Read, 1989). Explicit calibration runs were not done during the HOT cruises, so the calibration comes from brief periods with simultaneous GPS coverage and either bottom tracking or major ship accelerations, such as arrival on station. Calibration information from adjacent cruises was used along with that from the HOT cruises. Calibration accuracy (one standard deviation) on the HOT cruises is estimated as 0.5 degree in orientation and 0.5% in amplitude. The amplitude calibration tends to be more stable from cruise to cruise than the orientation because the latter is relative to the gyrocompass, which drifts over a period of days within a range of up to +/- 1 degree. NAVIGATION CALCULATION NAVIGATION USED : GPS and TRANSIT REFERENCE LAYER DEPTH RANGE : bins 5 to 20 FILTERING METHOD FOR SMOOTHING REFERENCE LAYER VELOCITY (FORM/WIDTH) : Blackman window function of width T ( 2 hr): w(t) = 0.42 - 0.5 * cos(2 * pi *t / T) + 0.08 * cos(4 * pi * t / T). FINALIZED SHIP VEL/POSITIONS STORED IN DATABASE : YES COMMENTS : GENERAL_ASSESSMENT : ok ON-STATION VS. UNDERWAY : ok VECTOR, CONTOUR, STICK PLOTS: ok COMMENTS : ok REFERENCES (DATA REPORTS,ETC.) : Chiswell,S., E. Firing, D. Karl, R. Lukas, C.Winn 1990. Hawaii Ocean Time-series Program, Data Report 1 1988-89. SOEST-90-1. School of Ocean and Earth Science and Technology, Univ. of Hawaii, 1000 Pope Rd., Honolulu Hawaii 96822