*2019/08/26 15:30:29.85 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/02/28 23:01:13.000 END TIME : UTC 2017/02/28 23:01:24.000 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 56 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 16.7 2 Depth metres 0.15 16.67 3 Temperature 'deg C (ITS90)' 7.642 7.678 4 Conductivity S/m 2.82285 2.83859 5 Conductance:Specific S/m 4.31993 4.34794 6 Salinity PSS-78 26.82 27 7 Speed:Sound m/s 1471.1 1471.46 8 Density kg/m^3 1020.901 1021.121 $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 : 275 LATITUDE : 49 17.73631 N ! (deg min) LONGITUDE : 123 6.51818 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 20:27:43 56 56 HDREDIT2 3.1.1 2017/12/13 11:33:17 ? ? CALIB 12.0 2019/08/26 15:30:29 56 56 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 20:27:43 -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_230113 % Cast time (UTC),2017-02-28 23:01:13 % Cast time (local),2017-02-28 23:01:13 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.2956052 % Start longitude,-123.1086363 % Start altitude,-20.799999237060547 % Start GPS horizontal error(Meter),11.0600004196167 % Start GPS vertical error(Meter),20.270000457763672 % Start GPS number of satellites,5 % End latitude,49.2958073 % End longitude,-123.1088099 % End altitude,-27.950000762939453 % End GPS horizontal error(Meter),4.6500000953674316 % End GPS vertical error(Meter),7.46999979019165 % End GPS number of satellites,6 % Cast duration (Seconds),71 % 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 7.678 2.82363 4.32033 26.82 1471.11 1020.901 0.45 0.45 7.676 2.82359 4.32063 26.82 1471.11 1020.904 0.75 0.75 7.676 2.82342 4.32034 26.82 1471.11 1020.903 1.05 1.05 7.675 2.82336 4.32043 26.82 1471.11 1020.905 1.35 1.35 7.672 2.82285 4.31993 26.82 1471.10 1020.904 1.65 1.65 7.672 2.82381 4.32148 26.83 1471.12 1020.913 1.95 1.95 7.670 2.82474 4.32320 26.84 1471.13 1020.924 2.25 2.25 7.668 2.82350 4.32149 26.83 1471.11 1020.916 2.55 2.55 7.667 2.82395 4.32234 26.83 1471.12 1020.922 2.85 2.85 7.666 2.82468 4.32351 26.84 1471.13 1020.930 3.15 3.15 7.665 2.82463 4.32360 26.84 1471.13 1020.931 3.45 3.44 7.665 2.82509 4.32434 26.84 1471.14 1020.937 3.75 3.74 7.662 2.82549 4.32528 26.85 1471.14 1020.943 4.05 4.04 7.659 2.82601 4.32651 26.86 1471.15 1020.951 4.35 4.34 7.657 2.82580 4.32647 26.86 1471.14 1020.952 4.65 4.64 7.656 2.82605 4.32704 26.86 1471.15 1020.956 4.95 4.94 7.654 2.82637 4.32780 26.87 1471.15 1020.962 5.25 5.24 7.653 2.82658 4.32820 26.87 1471.15 1020.965 5.55 5.54 7.653 2.82646 4.32809 26.87 1471.16 1020.966 5.85 5.84 7.652 2.82659 4.32832 26.87 1471.16 1020.969 6.15 6.14 7.653 2.82634 4.32782 26.87 1471.17 1020.967 6.45 6.44 7.654 2.82676 4.32835 26.87 1471.18 1020.971 6.75 6.74 7.653 2.82695 4.32877 26.87 1471.18 1020.975 7.05 7.04 7.654 2.82681 4.32848 26.87 1471.19 1020.975 7.35 7.34 7.654 2.82584 4.32698 26.86 1471.18 1020.968 7.65 7.64 7.654 2.82683 4.32844 26.87 1471.20 1020.977 7.95 7.94 7.654 2.82613 4.32732 26.86 1471.20 1020.972 8.25 8.24 7.655 2.82733 4.32904 26.87 1471.22 1020.983 8.55 8.54 7.654 2.82709 4.32879 26.87 1471.22 1020.983 8.85 8.84 7.655 2.82709 4.32871 26.87 1471.22 1020.984 9.15 9.14 7.655 2.82742 4.32929 26.88 1471.23 1020.988 9.45 9.44 7.655 2.82733 4.32909 26.87 1471.24 1020.988 9.75 9.73 7.654 2.82725 4.32905 26.87 1471.24 1020.989 10.05 10.03 7.654 2.82722 4.32899 26.87 1471.24 1020.990 10.35 10.33 7.654 2.82721 4.32908 26.87 1471.25 1020.992 10.65 10.63 7.654 2.82725 4.32911 26.87 1471.25 1020.994 10.95 10.93 7.654 2.82708 4.32882 26.87 1471.26 1020.993 11.25 11.23 7.654 2.82737 4.32929 26.87 1471.26 1020.997 11.55 11.53 7.654 2.82715 4.32900 26.87 1471.26 1020.997 11.85 11.83 7.654 2.82778 4.32987 26.88 1471.28 1021.003 12.15 12.13 7.654 2.82762 4.32966 26.88 1471.28 1021.003 12.45 12.43 7.654 2.82713 4.32898 26.87 1471.28 1021.001 12.75 12.73 7.654 2.82787 4.33003 26.88 1471.29 1021.008 13.05 13.03 7.653 2.82810 4.33051 26.88 1471.30 1021.011 13.35 13.33 7.652 2.82804 4.33063 26.88 1471.30 1021.013 13.65 13.63 7.650 2.82828 4.33119 26.89 1471.30 1021.018 13.95 13.93 7.649 2.83033 4.33443 26.91 1471.33 1021.036 14.25 14.23 7.649 2.83032 4.33444 26.91 1471.34 1021.038 14.55 14.53 7.647 2.83097 4.33570 26.92 1471.34 1021.046 14.85 14.83 7.648 2.83064 4.33511 26.91 1471.34 1021.044 15.15 15.13 7.648 2.83043 4.33471 26.91 1471.35 1021.043 15.45 15.43 7.647 2.83171 4.33683 26.92 1471.37 1021.056 15.75 15.72 7.647 2.83326 4.33920 26.94 1471.39 1021.070 16.05 16.02 7.646 2.83383 4.34021 26.95 1471.40 1021.077 16.35 16.32 7.642 2.83548 4.34329 26.97 1471.41 1021.094 16.70 16.67 7.643 2.83859 4.34794 27.00 1471.46 1021.121