#DATA_DATES: 2019/04/04 14:24:47 --- to --- 2019/04/30 02:52:47 #LON_RANGE: 40 E --- to --- 55.3 E #LAT_RANGE: 26 S --- to --- 11.3 S #DEPTH_RANGE: 24 --- to --- 240 m #SAC_CRUISE_ID: #PLATFORM_NAME: R/V Marion Dufresne II #PRINCIPAL_INVESTIGATOR_NAME: N. Metzl #PI_INSTITUTION: Metzl : LOCEAN/IPSL, (CNRS/IRD/MNHN/Sorbonne University) #PI_COUNTRY: FRANCE #PROJECT: CLIM-EPARSES #CRUISE_NAME: CLIM-EPARSES #PORTS: Le Port (La Reunion) #GEOGRAPHIC_REGION: Indian Ocean, Mozambique Channel, Iles Eparses (Scattered Islands) #PROCESSED_BY: LOCEAN, CNRS #NAVIGATION: GPS #QUALITY_NAV: #GENERAL_INFORMATION: CRUISE NOTES CHIEF SCIENTIST ON SHIP : Tribollet Aline INSTITUTE : LOCEAN/IPSL, (CNRS/IRD/MNHN/Sorbonne University ) COUNTRY : FRANCE FUNDING AGENCY: The CLIM-EPARSES project wassupported by: TAAF (Terres Australes et Antarctiques Françaises, IRD (Institut de Recherche pour le Developpement), Fondation Prince Albert II de Monaco (www.fpa2.org), CNRS (Centre National de Recherche Scientifique), Museum National d'Histoire Naturelle (MNHN), UMRs LOCEAN-IPSL, ENTROPIE and LSCE, INSU (Institut National des Sciences de l'Univers). SIGNIFICANT DATA GAPS : Europa 09/04/2019 08.12.47 (-22.3338 40.3451) to 09/04/2019 13.14.47 (-22.3335 40.3454) Gap 10/04/2019 05.22.47 (-22.3324 40.347) to 11/04/2019 15.02.47 (-22.3367 40.3385) 13/04/2019 04.32.47 (-17.0231 42.7433) to 13/04/2019 16.08.47 (-16.9412 42.6531) Juan de Nova 14/04/2019 02.56.47 (-16.9434 42.6592) to 14/04/2019 16.14.47 (-16.9397 42.6403) Gap 16/04/2019 02.52.47 (-16.9426 42.6581) to 16/04/2019 16.28.47 (-16.9404 42.6486) Mayotte 18/04/2019 04.00.47 (-12.5929 45.1297) to 19/04/2019 15.20.47 (-12.581 45.1347) Glorieuses 20/04/2019 07.38.47 (-11.587 47.2791) to 20/04/2019 13.18.47 (-11.5871 47.2788) 21/04/2019 05.58.47 (-11.5761 47.2758) to 21/04/2019 13.10.47 (-11.5652 47.2829) 22/04/2019 04.34.47 (-11.5631 47.2797) to 22/04/2019 15.06.47 (-11.5823 47.275) 23/04/2019 03.08.47 (-11.5154 47.3008) to 23/04/2019 14.24.47 (-11.4992 47.3028) SPECIAL SHIP TRACK PATTERNS : "Race track" pattern near every island. COMMENTS : No explanation from ship for underway gaps. Acquisition often stopped while mooring. ADCP INSTRUMENTATION MANUFACTURER : RD Instruments (RDI) HARDWARE MODEL : RD-VM OS150 SERIAL NUMBERS : ? FIRMWARE VERSION : ? TRANSMIT FREQUENCY : 150 kHz TRANSDUCER CONFIGURATION : JANUS CONVEX ACOUSTIC BEAM WIDTH : ? TRANSDUCER BEAM ANGLE : 30 deg. COMMENTS : - ADCP INSTALLATION METHOD/DESCRIPTION OF THE ATTACHMENT TO THE HULL : On Gondola (July 2015) LOCATION/DEPTH ON HULL : Nominally 6.5 m. Usually 6 m. REPEATABLE ATTACHMENT : YES DATE OF MOST RECENT ATTACH. : 2015 ACOUSTIC WINDOW : YES, with theoretically freshwater COMMENTS : - ADCP INSTRUMENT CONFIGURATION DEPTH RANGE : 24 - 240 m (bin centers) BIN LENGTH : 8 m NUMBER OF BINS : 55 TRANSMIT PULSE LENGTH : 8 BLANKING INTERVAL : 10 m ENSEMBLE AVERAGING INTERVAL : 120 s SOUND SPEED CALCULATION : function of temp at transducer BOTTOM TRACKING : NO DIRECT COMMANDS : YES COMMENTS : Narrow Band Profile Mode ADCP DATA ACQUISITION SYSTEM SOFTWARE DEVELOPERS : RDI SOFTWARE VERSIONS : VMDAS 1.49 DATA LOGGER, MAKE/MODEL : - ADCP/LOGGER COMMUNICATION : RS232 USER BUFFER VERSION : No UB CLOCK : GPS COMMENTS : - SHIP HEADING INSTRUMENT MAKE/MODEL : Inertial Platform APPLANIX POS-MV320B SYNCHRO OR STEPPER : - SYNCHRO RATIO : - COMPENSATION APPLIED : - GPS ATTITUDE SYSTEM : SimradEM - Hydrins A LOCATION OF ANTENNAS : 38.6 m forward, 6.3 m starboard RIGID ATTACHMENT : YES LOGGING RATE : 1 per sec ANCILLARY MEASUREMENTS SURFACE TEMP AND SALINITY : thermistor at transducer; none for salinity; ship Seabird thermosalinometer PITCH/ROLL MEASUREMENTS : yes 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 : A. Kartavtseff DATE OF PROCESSING : May 2020 SOUND SPEED CORRECTIONS : Applied using Seabird thermosalinograph temperature, controlled with ctd casts. NOTABLE SCATTERING LAYERS : - COMMENTS : - NAVIGATION TRANSIT : NO GPS : YES MAKE/MODEL : Sercel NR103T (1995) and Sercel NR230 (1995) SELECTIVE AVAILABILITY : YES P-CODE : NO DIFFERENTIAL : YES SAMPLE INTERVAL : 1 per sec LOCATION OF ANTENNA RELATIVE TO TRANSDUCER : 38.6 m forward, 6.3 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 LOGGED INDEPENDENTLY : NO COMMENTS : - CALIBRATION GYROCOMPASS CORRECTION : NO BOTTOM TRACK METHOD : NO WATER TRACK METHOD : YES, constant rotation FINAL SELECTION : AMPLITUDE= 0.9799 PHASE= -0.2818 COMMENTS : 144 calibration points NAVIGATION CALCULATION NAVIGATION USED : gps REFERENCE LAYER DEPTH RANGE : bins 3 - 5 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 rather good REFERENCES : Tribollet, A., 2019. Rapport de campagne, Rotation du Marion Dufresne dans les Iles Eparses du 4 au 30 avril 2019, CONSORTIUM DE RECHERCHE TAAF "Iles Eparses 2017-2020 ", Rapport Interne LOCEAN, 15 pp. Tribollet, A., 2020. Rapport d'activite intermediaire 2019 : Projet CLIM-EPARSES. CONSORTIUM DE RECHERCHE TAAF "Iles Eparses 2017-2020", 8 pp.