*2019/08/26 15:30:36.24 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/06/20 23:42:35.000 END TIME : UTC 2017/06/20 23:42:48.000 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 66 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 19.67 2 Depth metres 0.15 19.7 3 Temperature 'deg C (ITS90)' 9.979 14.57 4 Conductivity S/m 1.7437 3.15626 5 Conductance:Specific S/m 2.20334 4.50303 6 Salinity PSS-78 13.13 28.36 7 Speed:Sound m/s 1479.86 1482.91 8 Density kg/m^3 1009.259 1021.86 $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 : 521 LATITUDE : 49 18.43764 N ! (deg min) LONGITUDE : 123 6.85925 W ! (deg min) *INSTRUMENT TYPE : SonTek CTD MODEL : CastAway SERIAL NUMBER : CC1606003 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! ------------- ------ ---------- -------- --------- --------- READ_CHS_CTDS 1.0 2017/12/09 00:32:43 66 66 HDREDIT2 3.1.1 2017/12/13 11:33:21 ? ? CALIB 12.0 2019/08/26 15:30:36 66 66 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/09 00:32:43 -HEADER EDITS: 2017/12/13 11:33:21 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 15:30:36 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,CC1606003 % File name,CC1606003_20170620_234235 % Cast time (UTC),2017-06-20 23:42:35 % Cast time (local),2017-06-20 23:42:35 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.307294 % Start longitude,-123.1143208 % Start altitude,-17.020000457763672 % Start GPS horizontal error(Meter),2.0099999904632568 % Start GPS vertical error(Meter),3.4100000858306885 % Start GPS number of satellites,6 % End latitude, % End longitude, % End altitude, % End GPS horizontal error(Meter), % End GPS vertical error(Meter), % End GPS number of satellites, % Cast duration (Seconds),99.8 % Samples per second,5 % Electronics calibration date,0001-01-01 % Conductivity calibration date,2016-03-01 % Temperature calibration date,2016-02-23 % Pressure calibration date,2016-02-12 % 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 14.570 1.74370 2.20334 13.13 1479.87 1009.259 0.45 0.45 14.318 1.82103 2.31578 13.86 1479.86 1009.859 0.75 0.76 14.175 1.91938 2.44972 14.73 1480.39 1010.553 1.05 1.06 14.077 2.00280 2.56264 15.47 1480.92 1011.139 1.35 1.36 13.966 2.07993 2.66888 16.16 1481.36 1011.694 1.65 1.66 13.858 2.16572 2.78672 16.94 1481.89 1012.311 1.95 1.97 13.715 2.23563 2.88728 17.60 1482.18 1012.847 2.25 2.27 13.549 2.29625 2.97839 18.20 1482.32 1013.340 2.55 2.57 13.408 2.35343 3.06369 18.77 1482.50 1013.801 2.85 2.87 13.332 2.39933 3.12968 19.21 1482.76 1014.154 3.15 3.17 13.239 2.43971 3.19009 19.61 1482.91 1014.481 3.45 3.47 13.145 2.45926 3.22360 19.83 1482.85 1014.668 3.75 3.78 13.056 2.47672 3.25406 20.03 1482.79 1014.840 4.05 4.08 12.984 2.49009 3.27777 20.19 1482.73 1014.974 4.35 4.38 12.929 2.50595 3.30346 20.36 1482.74 1015.116 4.65 4.68 12.874 2.51851 3.32488 20.50 1482.72 1015.236 4.95 4.98 12.809 2.52542 3.33969 20.60 1482.61 1015.323 5.25 5.28 12.727 2.54442 3.37218 20.82 1482.58 1015.505 5.55 5.58 12.643 2.55502 3.39372 20.96 1482.46 1015.629 5.85 5.88 12.544 2.56622 3.41759 21.11 1482.30 1015.768 6.15 6.18 12.430 2.59420 3.46541 21.43 1482.28 1016.033 6.45 6.49 12.314 2.63021 3.52438 21.82 1482.35 1016.358 6.75 6.79 12.166 2.64862 3.56322 22.08 1482.13 1016.581 7.05 7.09 11.985 2.66550 3.60349 22.34 1481.81 1016.815 7.35 7.39 11.807 2.68375 3.64572 22.62 1481.51 1017.059 7.65 7.69 11.719 2.72329 3.70824 23.04 1481.70 1017.400 7.95 7.99 11.668 2.73927 3.73521 23.22 1481.74 1017.549 8.25 8.29 11.606 2.76006 3.76992 23.45 1481.80 1017.741 8.55 8.59 11.524 2.78397 3.81119 23.73 1481.84 1017.970 8.85 8.89 11.401 2.81247 3.86319 24.07 1481.82 1018.260 9.15 9.19 11.256 2.83196 3.90553 24.35 1481.64 1018.501 9.45 9.49 11.168 2.84373 3.93132 24.52 1481.53 1018.648 9.75 9.79 11.079 2.85813 3.96091 24.72 1481.45 1018.816 10.05 10.09 11.001 2.87595 3.99431 24.94 1481.44 1019.002 10.35 10.39 10.935 2.89675 4.03049 25.18 1481.50 1019.203 10.65 10.69 10.865 2.91457 4.06331 25.40 1481.51 1019.386 10.95 10.99 10.785 2.93656 4.10301 25.67 1481.55 1019.607 11.25 11.29 10.706 2.94575 4.12500 25.81 1481.44 1019.733 11.55 11.59 10.619 2.96373 4.16032 26.05 1481.42 1019.931 11.85 11.89 10.524 2.99990 4.22231 26.47 1481.58 1020.274 12.15 12.19 10.450 3.03270 4.27747 26.84 1481.77 1020.578 12.45 12.49 10.387 3.05572 4.31759 27.11 1481.87 1020.800 12.75 12.79 10.306 3.07931 4.36090 27.41 1481.93 1021.042 13.05 13.09 10.202 3.09460 4.39549 27.64 1481.84 1021.238 13.35 13.39 10.142 3.10088 4.41190 27.74 1481.76 1021.332 13.65 13.69 10.100 3.10551 4.42381 27.82 1481.70 1021.401 13.95 13.99 10.071 3.10973 4.43349 27.89 1481.68 1021.457 14.25 14.29 10.058 3.11078 4.43664 27.91 1481.66 1021.476 14.55 14.59 10.048 3.11517 4.44418 27.96 1481.69 1021.519 14.85 14.89 10.036 3.11751 4.44906 27.99 1481.69 1021.547 15.15 15.19 10.028 3.11939 4.45274 28.02 1481.69 1021.569 15.45 15.48 10.023 3.12425 4.46025 28.07 1481.74 1021.611 15.75 15.78 10.021 3.12677 4.46417 28.09 1481.77 1021.634 16.05 16.08 10.016 3.13009 4.46953 28.13 1481.81 1021.665 16.35 16.38 10.010 3.13518 4.47751 28.18 1481.86 1021.710 16.65 16.68 10.004 3.14040 4.48573 28.24 1481.91 1021.756 16.95 16.98 10.001 3.14198 4.48840 28.26 1481.92 1021.772 17.25 17.28 10.000 3.14425 4.49178 28.28 1481.95 1021.792 17.55 17.58 10.003 3.14614 4.49406 28.30 1481.99 1021.805 17.85 17.88 10.008 3.14707 4.49477 28.30 1482.02 1021.810 18.15 18.18 10.000 3.14736 4.49620 28.31 1482.00 1021.819 18.45 18.48 9.991 3.14787 4.49817 28.32 1481.99 1021.832 18.75 18.78 9.984 3.14908 4.50072 28.34 1481.99 1021.848 19.05 19.08 9.982 3.14837 4.49998 28.34 1481.98 1021.845 19.35 19.38 9.979 3.14906 4.50132 28.35 1481.99 1021.854 19.67 19.70 10.046 3.15626 4.50303 28.36 1482.26 1021.860