#DATA_DATES: 1995/08/16 05:08:00 --- to --- 1995/09/19 03:25:00
 #LON_RANGE:  49.99 E --- to ---  60.11 E
 #LAT_RANGE:   2.51 S --- to ---  23.64 N
 #DEPTH_RANGE:     21 --- to --- 493 m
 #SAC_CRUISE_ID: 00252 
 #PLATFORM_NAME: R/V Meteor
 #PRINCIPAL_INVESTIGATOR_NAME: F. Schott
 #PI_INSTITUTION: Institute fur Meereskunde
 #PI_COUNTRY: Germany
 #PROJECT: WOCE Arabian Sea (Special Survey) (Repeat Survey)
 #CRUISE_NAME: ship_tag=M32/6 woce_tag=IR03N,ISS02 EXPOCODE=06MT32_6
 #PORTS: Muscat, Oman to Muscat, Oman
 #GEOGRAPHIC_REGION: Arabian Sea, Indian Ocean
 #PROCESSED_BY: Institut fuer Meereskunde, Hamburg
 #NAVIGATION: GPS
 #QUALITY_NAV: good
 #GENERAL_INFORMATION: 
CRUISE NOTES
  CHIEF SCIENTIST ON SHIP     : F. Schott, D. Kindler (ADCP)
    INSTITUTE                 : Institute fur Meereskunde 
    COUNTRY                   : Germany
  SIGNIFICANT DATA GAPS       : 
  SPECIAL SHIP TRACK PATTERNS :
  COMMENTS                    : The cruise emphasized the study of the 
upwelling region near the coast of Oman and the Great Whirl region.  Also
hydrographic sections were taken across the equator and the Arabian Sea, 
and east of the Owens Fracture Zone to study deep water exchange between 
the Somalia and Arabian Sea Basins.

The overall data quality was good and comparable to the data quality of
M32/1 and M32/4.  Quality reduction due to noise induced by large surface
waves must be taken into account between 16N and 8N on southward section.
In this area, the depth range reduces sometimes to as low as 300m.  Noisy
data is also found around 10N to 12N on 54E and in between 18N and 20N off
the coast of Oman.  Poor satellite coverage impeded the quality of navigation.

ADCP INSTRUMENTATION
  MANUFACTURER                : RDI
  HARDWARE MODEL              : 150
  SERIAL NUMBERS              :
  FIRMWARE VERSION            :
  TRANSMIT FREQUENCY          : 153.6 kHz
  TRANSDUCER CONFIGURATION    : JANUS CONCAVE
  COMMENTS                    :

ADCP INSTALLATION
  METHOD/DESCRIPTION OF THE
    ATTACHMENT TO THE HULL    : The transducers were installed in the front hull
                                to reduce noise by propeller cavitation.
  LOCATION/DEPTH ON HULL      : Transducer depth at nominally 5 m
  REPEATABLE ATTACHMENT       : 
  DATE OF MOST RECENT ATTACH. :
  ACOUSTIC WINDOW             : 
  COMMENTS                    :

ADCP INSTRUMENT CONFIGURATION     
  DEPTH RANGE                 : 21 to 493
  BIN LENGTH                  : 8 m
  NUMBER OF BINS              : 60
  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             :
  COMMENTS                    : 

ADCP DATA ACQUISITION SYSTEM
  SOFTWARE DEVELOPERS         : RDI
  SOFTWARE VERSIONS           : DAS 2.48
  DATA LOGGER, MAKE/MODEL     : PC
  ADCP/LOGGER COMMUNICATION   :
  USER BUFFER VERSION         : User Exit 1920_buffer
  CLOCK                       : Ashtech GPS synchronizes the PC clock 
                                via the User Exit (ue3.exe) program
  COMMENTS                    :

SHIP HEADING                      
  INSTRUMENT MAKE/MODEL       : gyro
  SYNCHRO OR STEPPER          :
  SYNCHRO RATIO               :
  COMPENSATION APPLIED        : no
  GPS ATTITUDE SYSTEM         : YES, Ashtech
    LOCATION OF ANTENNAS      :
    RIGID ATTACHMENT          : 
    LOGGING RATE              :

ANCILLARY MEASUREMENTS            
  SURFACE TEMP AND SALINITY   : thermistor and CTD
  PITCH/ROLL MEASUREMENTS     :
  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         : M.Dengler
  DATE OF PROCESSING          : 1997
  ADDED TO NODC DB            : July 1998
  NOTABLE SCATTERING LAYERS   :
  COMMENTS                    :
Speed of Sound: the transducer temperature was compared to CTD data
which revealed an offset of -0.032C.  Also CTD salinity values of 6m
depth were interpolated to calculate corrected sound speed for every
ensemble.  The temperature and salinity corrections were applied
to the database, which automatically alters velocity magnitudes.

Profile editing performed for bottom reflection, wire interference,
and spectral width broadening while underway.

NAVIGATION
  GPS                         : YES
    MAKE/MODEL                : Magnavox
    SELECTIVE AVAILABILITY    : 
    P-CODE                    : 
    DIFFERENTIAL              : no
    SAMPLE INTERVAL           :
    LOCATION OF ANTENNA
      RELATIVE TO TRANSDUCER  :
    TIME OBTAINED RELATIVE TO
      START/END OF ENSEMBLE   : end (UE3.exe program)
    AVERAGING/EDITING APPLIED : yes, bad fixes edited out
    LOGGED WITH ADCP DATA     : yes
    LOGGED INDEPENDENTLY      : yes
    COMMENTS                  :
  OTHER                       : 

CALIBRATION 
    GYROCOMPASS CORRECTION      : YES, Ashtech
The gyrocompass was corrected for each ensemble with Ashtech information.
Discontinuities in the Ashtech data resulted in corrections to the gyro
based on least square fit dependencies.

    BOTTOM TRACK METHOD         : No
    WATER TRACK METHOD          : YES
       CALIBRATION POINTS       : 231
          AFTER EDITING         : 193 
       MISALIGNMENT ANGLE       : mean 1.16, rms 0.7700, drift +0.0081 deg/d
       CURRENT AMPLITUDE        : mean 1.0016, rms 0.0130, drif +0.0000
    FINAL SELECTION             : AMPLITUDE= 1.0011     PHASE= 1.16
    AGREEMENT WITH PREVIOUS 
      CRUISES                   : good
    SOUND SPEED CORRECTIONS     : YES, using CTD data

NAVIGATION CALCULATION             
    NAVIGATION USED             : GPS
    REFERENCE LAYER DEPTH RANGE : bins 5 to 20
    FILTERING METHOD FOR 
      SMOOTHING REFERENCE LAYER 
      VELOCITY (FORM/WIDTH)     :  Blackman window function of width T ( .5 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.) : Data report as follows:
Dengler, M. 1998. Shipboard ADCP Measurements in the Arabian Sea 1995.
     Data Acquisition, Processing, and Calibration.  FS Meteor WOCE Cruises
     M32/1, M32/4, M32/6 and JGOFS cruises M32/5, M33/1.
     Institut fuer Meereskunde, Troplowitzstr. 7, 22529 Hamburg.