S3 (P12) bathymetry: ASCII navigation and bathymetry data files were obtained from Susan Wijffels via Jim Crease on 11/13/98. Updated 7/24/2003 L. Talley The cruise covers both S3 (P12) and S4I. Expedition designation (ExpoCode) 09AR9404_1 Chief scientist and affiliation Steve Rintoul/CSIRO* Ship RSV Aurora Australis Cruise dates 1994.DEC.13 to 1995.FEB.02 Ports of call Casey "S3_bathy_original.zip" is the zipped original data file au9404.dep (format specified below) "S3_bathy_edit.zip" is the edited original data file "S3_bathy_gdc.dat" is the edited data in Geological Data Center format, including corrected depths at all recorded locations. "S3_bathy_gdc_clean.dat" is the edited data in Geological Data Center format, including corrected depths at all recorded locations, with anomalies in navigation removed (see below). "S3_bathydist.dat" is the decimated bathymetry file, projected onto straight lines between station positions, used for plotting the vertical sections. Bathymetry from Smith/Sandwell altimetric product is used for the station ranges 74-79 and 92-98 because of large gaps in bathymetry (both ranges) and problems with the navigation (74-79) (NOT HERE YET) "S3_sta_bdep.dat" is the station list, with corrected bottom pressures for each station, based on the WHP sum file (station summary file) (CORRECT VERSION NOT HERE YET) ----------------------------------------------- Format specifications Ascii Navigation format for "file_bathy_gdc.dat" latitude (xxx.xxx) longitude (xxxx.xxx) unc depth (xxxxx.x) meters corr depth (xxxxx.x) meters month (ii) day (iii) day of the month year (ii) assuming 1900 century hour (ii) minute (ii) second (ii) Julian date (xxxxxxx.xxxxx) Format of "s3_bathydist.dat" ist (iii) station number (set to 1) dist (ffffff.f) distance (km) along section lat (dddddd.mm) decimal latitude lon (dddddd.mm) decimal longitude dpt (ddddd.d) depth meters Format of s3_sta_bdep.dat station (iiii) station number distance (xxxxx.x) km along section latitude (xxx.xxx) longitude (xxxx.xxx) pressure (xxxx.x) dbar OR depth in meters ------------------------------------------------------------- Original data format: column parameter 1 decimal time (0.0=midnight on December 31st) 2 day 3 month 4 year 5 hour 6 minute 7 second 8 latitude (decimal degrees,+ve=north, -ve=south) 9 longitude(decimal degrees,+ve=east, -ve=west) 10 depth (m), using a sound speed of 1498 m/s, and measured from the water surface Data are instantaneous readings at each 10 second interval. There is a line of data for each 10 second interval. -999.0 = null value All depth have been standardised to a sound speed of 1498 m/s -------Notes on editing and decimation----- au9404_edit.dep All lines with missing depths removed. Bathymetry data are clean although gappy. Problem with navigation apparent but retained for region between stations 74 and 79 S3_bathy_gdc.dat portion of au9404_edit.dep appropriate for S3 selected. Data decimated to every 6th point, or approximately 1/minute (except that there were many data gaps removed initially) All ship speeds less than 2 knots and greater than 30 knots removed (to remove all data from station locations) S3_bathy_gdc_clean.dat S3_bathy_gdc.dat with loop at stations 86-88 removed, and all backtracks in latitude removed.