*2019/08/26 15:30:29.77 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/02/28 22:55:34.000 END TIME : UTC 2017/02/28 22:55:44.800 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 55 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 16.32 2 Depth metres 0.15 16.3 3 Temperature 'deg C (ITS90)' 7.639 7.74 4 Conductivity S/m 2.81158 2.85114 5 Conductance:Specific S/m 4.30362 4.36748 6 Salinity PSS-78 26.7 27.13 7 Speed:Sound m/s 1470.86 1471.66 8 Density kg/m^3 1020.813 1021.224 $END $TABLE: CHANNEL DETAIL ! No Pad Start Width Format Type Decimal_Places !--- ---- ----- ----- ------ ---- -------------- 1 -99 ' ' 7 F R4 2 2 -99 ' ' 7 F R4 2 3 -99 ' ' 8 F R4 3 4 -99 ' ' 10 F R4 5 5 -99 ' ' 10 F R4 5 6 -99 ' ' 7 F R4 2 7 -99 ' ' 8 F R4 2 8 -99 ' ' 9 F R4 3 $END *ADMINISTRATION MISSION : 2017-98 AGENCY : Canadian Hydrographic Service COUNTRY : Canada PROJECT : CHS CTD Data Acquisition SCIENTIST : Dangerfield N. *LOCATION EVENT NUMBER : 274 LATITUDE : 49 17.40016 N ! (deg min) LONGITUDE : 123 6.76823 W ! (deg min) *INSTRUMENT TYPE : SonTek CTD MODEL : CastAway SERIAL NUMBER : CC1545005 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! ------------- ------ ---------- -------- --------- --------- READ_CHS_CTDS 1.0 2017/12/08 20:26:51 55 55 HDREDIT2 3.1.1 2017/12/13 11:33:17 ? ? CALIB 12.0 2019/08/26 15:30:29 55 55 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 20:26:50 -HEADER EDITS: 2017/12/13 11:33:17 Applied edit header: P:\Cruise_Data_Processing\CHS_data\test\Docs\CHS-ref-HDR.TXT Channel 1: Pressure [decibar] Format: F10.3 ==> F7.2 Channel 2: Depth [metres] Format: F10.3 ==> F7.2 Channel 3: Temperature [deg C (ITS90)] Format: F10.3 ==> F8.3 Channel 4: Conductivity [mS/cm] Format: F10.3 ==> F9.1 Channel 6: Salinity [PSS-78] Format: F10.3 ==> F7.2 Channel 8: Density [kg/m^3] Format: F10.3 ==> F9.3 Channel 5: Conductance:Specific [mS/cm] Format: F10.3 ==> F9.1 Channel 7: Speed:Sound [m/s] Format: F10.3 ==> F8.2 -CALIB parameters: 2019/08/26 15:30:29 Calibration type = Correct Mode: ONLY - calibration specs from Cal File only. Calibration file = Q:\OSD_DataProcessing\Cruise_data\conductivity-corrections\recal-cond.CCF Calibrations applied: Ch Name Units Fmla Coefficents -- ----------------------------- --------- --- ----------------------------- 4 Conductivity S/m 10 0.0000000E+00 0.1000000E-03 5 Conductance:Specific S/m 10 0.0000000E+00 0.1000000E-03 $END *COMMENTS Data Processing Notes: The CastAway-CTD is a small profiling instrument that measures conductivity, temperature, and pressure. Its embedded firmware controls all of the instrument's functions. It is designed for profiling to depths of up to 100m at 5 Hz. It uses a six electrode flow-through conductivity cell with zero external field coupled with a rapid response thermistor (<5Hz) to attain high measurement accuracies. The instrument does not require a pump and is hydrodynamically designed to free fall rate of 1 m/s. Processing was done using the CastAway CTD data processing system which included the following steps: - Pressure correction to remove ambient atmospheric pressure. - Removal of records obtained while the system was stationary. - De-spiking of conductivity data to remove erratic measurements near the water surface that can be caused by air bubbles trapped in the conductivity flow cell. - Bin-averaging with 0.3db bins with linear interpolation used to fill empty bins or the nearest available value for surface or bottom bins. - Combination of downcast and upcast data using a weighted average based on fall velocity. - Derivation of specific conductance, salinity, sound speed, density and depth for each pressure bin. The data were converted to IOS Header format and some quality control checks were made. Resolution and Accuracy as stated by the manufacturer is: Channel Resolution Accuracy Pressure 0.01 db 0.25 db Depth 0.01 m 0.25 m Temperature 0.01 degrees C 0.05 degrees C Conductivity 1 mS/cm 5 mS/cm Conductance:Specific 1 mS/cm 5 mS/cm Salinity 0.01 (PSS-78) 0.1 (PSS-78) Speed:Sound 0.01 m/s 0.15 m/s Density 0.004 kg/m3 0.02 kg/m3 GPS 10m Density is derived based on temperature resolution and accuracy using the International Equation of State for sea water (EOS-80). Depth and Specific Conductance are derived using the International Equation of State for sea water (EOS-80). Salinity was calculated using the 1978 Practical Salinity Scale. Sound Speed was calculated using the method of Chen-Millero, 1977. Original data file header: % Device,CC1545005 % File name,CC1545005_20170228_225534 % Cast time (UTC),2017-02-28 22:55:34 % Cast time (local),2017-02-28 22:55:34 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.2900027 % Start longitude,-123.1128039 % Start altitude,-12.300000190734863 % Start GPS horizontal error(Meter),6.5199999809265137 % Start GPS vertical error(Meter),13.300000190734863 % Start GPS number of satellites,5 % End latitude,49.2899218 % End longitude,-123.1128404 % End altitude,-27.469999313354492 % End GPS horizontal error(Meter),4.619999885559082 % End GPS vertical error(Meter),9.3999996185302734 % End GPS number of satellites,5 % Cast duration (Seconds),66 % Samples per second,5 % Electronics calibration date,0001-01-01 % Conductivity calibration date,2015-11-20 % Temperature calibration date,2015-11-19 % Pressure calibration date,2015-11-17 % For more information about the CastAway CTD see document "CastAway CTD Principles of Operation.pdf”. *CALIBRATION $TABLE: CORRECTED CHANNELS ! Name Units Fmla Pad Coefficients ! ---------------------- ----- ---- ------ ------------ Conductivity S/m 10 -99 () (0 0.1E-03) Conductance:Specific S/m 10 -99 () (0 0.1E-03) $END !--1--- --2--- ---3--- ----4---- ----5---- --6--- ---7--- ---8---- !Pressu Depth Tempera Conductiv Conductan Salini Speed: Density !re ture ity ce: ty Sound ! Specific !------ ------ ------- --------- --------- ------ ------- -------- *END OF HEADER 0.15 0.15 7.646 2.81163 4.30620 26.72 1470.86 1020.826 0.45 0.45 7.665 2.81158 4.30362 26.70 1470.92 1020.813 0.75 0.75 7.677 2.81814 4.31214 26.76 1471.05 1020.859 1.05 1.05 7.685 2.82010 4.31402 26.78 1471.10 1020.870 1.35 1.35 7.693 2.82219 4.31618 26.79 1471.15 1020.883 1.65 1.65 7.698 2.82477 4.31945 26.82 1471.21 1020.902 1.95 1.95 7.702 2.82564 4.32027 26.82 1471.23 1020.908 2.25 2.25 7.711 2.82910 4.32434 26.85 1471.31 1020.930 2.55 2.55 7.720 2.83249 4.32838 26.88 1471.39 1020.953 2.85 2.85 7.728 2.83549 4.33191 26.91 1471.45 1020.973 3.15 3.15 7.735 2.83955 4.33722 26.94 1471.53 1021.003 3.45 3.44 7.739 2.84063 4.33836 26.95 1471.56 1021.010 3.75 3.74 7.740 2.84080 4.33839 26.95 1471.57 1021.012 4.05 4.04 7.740 2.84074 4.33829 26.95 1471.58 1021.012 4.35 4.34 7.739 2.84077 4.33848 26.95 1471.58 1021.015 4.65 4.64 7.739 2.84105 4.33899 26.95 1471.58 1021.019 4.95 4.94 7.737 2.84120 4.33950 26.96 1471.59 1021.023 5.25 5.24 7.736 2.84201 4.34084 26.97 1471.60 1021.031 5.55 5.54 7.735 2.84240 4.34159 26.97 1471.60 1021.037 5.85 5.84 7.733 2.84301 4.34273 26.98 1471.61 1021.044 6.15 6.14 7.732 2.84340 4.34347 26.98 1471.62 1021.049 6.45 6.44 7.731 2.84335 4.34345 26.98 1471.62 1021.051 6.75 6.74 7.730 2.84344 4.34373 26.98 1471.62 1021.053 7.05 7.04 7.729 2.84328 4.34365 26.98 1471.62 1021.054 7.35 7.34 7.728 2.84353 4.34426 26.99 1471.63 1021.059 7.65 7.64 7.725 2.84336 4.34428 26.99 1471.62 1021.060 7.95 7.94 7.724 2.84426 4.34583 27.00 1471.63 1021.070 8.25 8.24 7.720 2.84396 4.34592 27.00 1471.62 1021.072 8.55 8.54 7.717 2.84445 4.34709 27.00 1471.63 1021.080 8.85 8.84 7.716 2.84431 4.34699 27.00 1471.63 1021.080 9.15 9.13 7.716 2.84429 4.34693 27.00 1471.63 1021.081 9.45 9.44 7.715 2.84419 4.34689 27.00 1471.63 1021.082 9.75 9.73 7.715 2.84436 4.34723 27.01 1471.64 1021.086 10.05 10.03 7.712 2.84409 4.34717 27.00 1471.63 1021.087 10.35 10.33 7.711 2.84390 4.34702 27.00 1471.63 1021.087 10.65 10.63 7.709 2.84457 4.34826 27.01 1471.64 1021.095 10.95 10.93 7.706 2.84587 4.35062 27.03 1471.65 1021.109 11.25 11.23 7.704 2.84610 4.35126 27.03 1471.65 1021.114 11.55 11.53 7.702 2.84656 4.35233 27.04 1471.66 1021.121 11.85 11.83 7.698 2.84689 4.35334 27.04 1471.65 1021.128 12.15 12.13 7.692 2.84668 4.35376 27.05 1471.64 1021.131 12.45 12.43 7.682 2.84699 4.35565 27.06 1471.62 1021.143 12.75 12.73 7.669 2.84646 4.35648 27.06 1471.58 1021.149 13.05 13.03 7.657 2.84676 4.35852 27.07 1471.55 1021.162 13.35 13.33 7.655 2.84732 4.35970 27.08 1471.56 1021.169 13.65 13.63 7.653 2.84818 4.36134 27.09 1471.57 1021.179 13.95 13.93 7.645 2.84864 4.36302 27.10 1471.56 1021.190 14.25 14.23 7.640 2.84878 4.36394 27.11 1471.55 1021.196 14.55 14.53 7.639 2.84899 4.36444 27.11 1471.55 1021.200 14.85 14.83 7.639 2.84940 4.36504 27.11 1471.56 1021.205 15.15 15.12 7.640 2.84939 4.36493 27.11 1471.57 1021.205 15.45 15.42 7.639 2.84972 4.36546 27.12 1471.58 1021.210 15.75 15.72 7.639 2.84971 4.36547 27.12 1471.58 1021.211 16.05 16.02 7.639 2.85096 4.36742 27.13 1471.60 1021.223 16.32 16.30 7.641 2.85114 4.36748 27.13 1471.61 1021.224