*2019/08/26 15:30:34.39 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/03/04 01:55:00.000 END TIME : UTC 2017/03/04 01:55:10.000 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 51 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 15.21 2 Depth metres 0.15 15.21 3 Temperature 'deg C (ITS90)' 6.931 7.146 4 Conductivity S/m 2.54395 2.66099 5 Conductance:Specific S/m 3.98346 4.13897 6 Salinity PSS-78 24.43 25.51 7 Speed:Sound m/s 1465.2 1467.63 8 Density kg/m^3 1019.118 1020.006 $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 : 346 LATITUDE : 49 18.09684 N ! (deg min) LONGITUDE : 123 6.90877 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 21:38:22 51 51 HDREDIT2 3.1.1 2017/12/13 11:33:19 ? ? CALIB 12.0 2019/08/26 15:30:34 51 51 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 21:38:21 -HEADER EDITS: 2017/12/13 11:33:19 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 15:30:34 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_20170304_015500 % Cast time (UTC),2017-03-04 01:55:00 % Cast time (local),2017-03-04 01:55:00 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.301614 % Start longitude,-123.1151462 % Start altitude,-18.520000457763672 % Start GPS horizontal error(Meter),1.7000000476837158 % Start GPS vertical error(Meter),3.6600000858306885 % Start GPS number of satellites,5 % End latitude,49.3014434 % End longitude,-123.1148281 % End altitude,-20.229999542236328 % End GPS horizontal error(Meter),9.5500001907348633 % End GPS vertical error(Meter),21.809999465942383 % End GPS number of satellites,5 % Cast duration (Seconds),48.2 % 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 6.931 2.54395 3.98346 24.43 1465.20 1019.118 0.45 0.45 6.951 2.54656 3.98508 24.45 1465.30 1019.128 0.75 0.75 6.964 2.56685 4.01528 24.65 1465.61 1019.289 1.05 1.05 6.970 2.57414 4.02583 24.73 1465.73 1019.346 1.35 1.35 6.975 2.57899 4.03289 24.77 1465.82 1019.385 1.65 1.65 6.983 2.58157 4.03587 24.79 1465.88 1019.402 1.95 1.95 6.993 2.58933 4.04678 24.87 1466.02 1019.461 2.25 2.25 7.000 2.59777 4.05898 24.95 1466.16 1019.527 2.55 2.55 7.009 2.60661 4.07167 25.04 1466.30 1019.595 2.85 2.85 7.017 2.60861 4.07380 25.05 1466.36 1019.608 3.15 3.15 7.026 2.62206 4.09368 25.19 1466.57 1019.714 3.45 3.45 7.048 2.62421 4.09420 25.20 1466.67 1019.718 3.75 3.75 7.061 2.63224 4.10511 25.27 1466.82 1019.777 4.05 4.05 7.073 2.63459 4.10722 25.29 1466.89 1019.790 4.35 4.35 7.077 2.64043 4.11577 25.35 1466.98 1019.836 4.65 4.65 7.080 2.64175 4.11739 25.36 1467.02 1019.846 4.95 4.95 7.083 2.63827 4.11164 25.32 1466.98 1019.817 5.25 5.25 7.082 2.63932 4.11336 25.33 1467.00 1019.828 5.55 5.55 7.083 2.64098 4.11588 25.35 1467.03 1019.842 5.85 5.85 7.086 2.64026 4.11429 25.34 1467.04 1019.835 6.15 6.15 7.091 2.64406 4.11958 25.37 1467.10 1019.864 6.45 6.45 7.096 2.64391 4.11871 25.37 1467.12 1019.861 6.75 6.75 7.099 2.64531 4.12057 25.38 1467.15 1019.872 7.05 7.05 7.101 2.64674 4.12257 25.39 1467.18 1019.884 7.35 7.35 7.103 2.64775 4.12387 25.40 1467.21 1019.892 7.65 7.65 7.104 2.64799 4.12412 25.41 1467.22 1019.895 7.95 7.95 7.104 2.64847 4.12483 25.41 1467.23 1019.900 8.25 8.25 7.105 2.64915 4.12581 25.42 1467.24 1019.907 8.55 8.55 7.105 2.64878 4.12525 25.41 1467.24 1019.905 8.85 8.85 7.105 2.64883 4.12520 25.41 1467.25 1019.906 9.15 9.15 7.106 2.64877 4.12503 25.41 1467.26 1019.906 9.45 9.45 7.106 2.64721 4.12258 25.39 1467.24 1019.895 9.75 9.75 7.107 2.64488 4.11886 25.37 1467.22 1019.876 10.05 10.05 7.107 2.64671 4.12166 25.39 1467.25 1019.892 10.35 10.35 7.109 2.64703 4.12198 25.39 1467.26 1019.895 10.65 10.65 7.111 2.64836 4.12375 25.40 1467.29 1019.906 10.95 10.95 7.114 2.64803 4.12289 25.40 1467.30 1019.903 11.25 11.25 7.116 2.64882 4.12385 25.40 1467.32 1019.909 11.55 11.55 7.120 2.65104 4.12678 25.42 1467.37 1019.926 11.85 11.85 7.127 2.65186 4.12710 25.43 1467.41 1019.929 12.15 12.14 7.131 2.65291 4.12822 25.43 1467.44 1019.936 12.45 12.45 7.134 2.65327 4.12846 25.44 1467.45 1019.939 12.75 12.74 7.136 2.65375 4.12895 25.44 1467.47 1019.942 13.05 13.04 7.139 2.65549 4.13123 25.46 1467.51 1019.956 13.35 13.35 7.141 2.65851 4.13572 25.49 1467.56 1019.981 13.65 13.64 7.142 2.65928 4.13675 25.49 1467.58 1019.988 13.95 13.94 7.144 2.65919 4.13640 25.49 1467.59 1019.987 14.25 14.24 7.144 2.65920 4.13638 25.49 1467.59 1019.988 14.55 14.54 7.145 2.66031 4.13804 25.50 1467.61 1019.999 14.85 14.84 7.145 2.66068 4.13851 25.50 1467.62 1020.002 15.21 15.21 7.146 2.66099 4.13897 25.51 1467.63 1020.006