*2019/08/26 15:30:11.59 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2016/10/18 20:15:40.000 END TIME : UTC 2016/10/18 20:15:51.200 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 57 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 16.84 2 Depth metres 0.15 16.91 3 Temperature 'deg C (ITS90)' 10.581 10.667 4 Conductivity S/m 0.32715 3.21732 5 Conductance:Specific S/m 0.45969 4.52022 6 Salinity PSS-78 2.42 28.55 7 Speed:Sound m/s 1452.58 1484.4 8 Density kg/m^3 1001.543 1021.899 $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 : 2016-98 AGENCY : Canadian Hydrographic Service COUNTRY : Canada PROJECT : CHS CTD Data Acquisition SCIENTIST : Dangerfield N. *LOCATION EVENT NUMBER : 402 LATITUDE : 49 7.52367 N ! (deg min) LONGITUDE : 123 15.03445 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 2017/12/08 22:35:04 57 57 HDREDIT2 3.1.1 2017/12/13 11:31:14 ? ? CALIB 12.0 2019/08/26 15:30:11 57 57 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 22:35:04 -HEADER EDITS: 2017/12/13 11:31:14 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 15:30:11 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_20161018_201540 % Cast time (UTC),2016-10-18 20:15:40 % Cast time (local),2016-10-18 20:15:40 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.1253945 % Start longitude,-123.2505741 % Start altitude,-22.049999237060547 % Start GPS horizontal error(Meter),2.25 % Start GPS vertical error(Meter),3.190000057220459 % Start GPS number of satellites,7 % End latitude, % End longitude, % End altitude, % End GPS horizontal error(Meter), % End GPS vertical error(Meter), % End GPS number of satellites, % Cast duration (Seconds),95 % 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 10.584 0.32715 0.45969 2.42 1452.58 1001.543 0.45 0.46 10.584 0.33352 0.46864 2.47 1452.65 1001.584 0.75 0.76 10.582 0.34243 0.48118 2.54 1452.73 1001.640 1.05 1.07 10.581 0.33729 0.47397 2.50 1452.68 1001.610 1.35 1.37 10.582 0.33692 0.47344 2.50 1452.69 1001.609 1.65 1.68 10.583 0.34394 0.48329 2.55 1452.76 1001.654 1.95 1.99 10.583 0.34735 0.48808 2.58 1452.81 1001.676 2.25 2.29 10.584 0.34858 0.48980 2.59 1452.82 1001.685 2.55 2.60 10.586 0.35067 0.49270 2.60 1452.86 1001.699 2.85 2.90 10.588 0.35005 0.49182 2.60 1452.86 1001.696 3.15 3.21 10.585 0.35135 0.49369 2.61 1452.87 1001.706 3.45 3.51 10.584 0.37153 0.52204 2.77 1453.07 1001.832 3.75 3.82 10.585 0.43146 0.60624 3.25 1453.66 1002.205 4.05 4.12 10.589 0.62804 0.88235 4.85 1455.63 1003.452 4.35 4.43 10.599 0.95679 1.34384 7.62 1459.04 1005.603 4.65 4.73 10.606 1.36388 1.91523 11.17 1463.36 1008.358 4.95 5.03 10.615 1.90845 2.67927 16.08 1469.31 1012.169 5.25 5.33 10.624 2.16619 3.04039 18.46 1472.21 1014.015 5.55 5.63 10.635 2.29524 3.22045 19.66 1473.70 1014.946 5.85 5.94 10.650 2.39162 3.35427 20.56 1474.84 1015.641 6.15 6.24 10.658 2.47795 3.47457 21.37 1475.85 1016.270 6.45 6.54 10.664 2.57766 3.61379 22.32 1477.00 1017.001 6.75 6.84 10.667 2.79354 3.91610 24.38 1479.50 1018.602 7.05 7.14 10.659 2.96954 4.16380 26.08 1481.52 1019.927 7.35 7.44 10.652 3.04634 4.27232 26.83 1482.41 1020.513 7.65 7.74 10.643 3.07080 4.30768 27.07 1482.67 1020.705 7.95 8.04 10.636 3.08543 4.32906 27.22 1482.83 1020.823 8.25 8.34 10.631 3.09110 4.33762 27.28 1482.89 1020.871 8.55 8.64 10.626 3.10006 4.35088 27.37 1482.98 1020.944 8.85 8.94 10.625 3.10427 4.35688 27.41 1483.04 1020.978 9.15 9.24 10.624 3.11544 4.37262 27.52 1483.17 1021.064 9.45 9.54 10.624 3.12115 4.38073 27.58 1483.24 1021.109 9.75 9.84 10.622 3.12279 4.38321 27.60 1483.26 1021.124 10.05 10.13 10.621 3.13718 4.40357 27.74 1483.43 1021.236 10.35 10.43 10.618 3.14966 4.42145 27.86 1483.58 1021.334 10.65 10.73 10.615 3.16097 4.43770 27.97 1483.71 1021.423 10.95 11.03 10.609 3.16715 4.44713 28.04 1483.77 1021.476 11.25 11.33 10.601 3.17861 4.46419 28.16 1483.89 1021.571 11.55 11.63 10.599 3.19515 4.48772 28.32 1484.08 1021.700 11.85 11.93 10.597 3.19263 4.48442 28.30 1484.05 1021.683 12.15 12.23 10.596 3.19596 4.48923 28.33 1484.09 1021.711 12.45 12.53 10.594 3.20155 4.49728 28.39 1484.16 1021.756 12.75 12.83 10.592 3.20764 4.50612 28.45 1484.23 1021.805 13.05 13.13 10.590 3.21321 4.51414 28.50 1484.30 1021.850 13.35 13.43 10.587 3.21555 4.51784 28.53 1484.32 1021.872 13.65 13.73 10.584 3.21665 4.51981 28.54 1484.33 1021.884 13.95 14.03 10.584 3.21657 4.51970 28.54 1484.33 1021.885 14.25 14.32 10.585 3.21563 4.51820 28.53 1484.33 1021.878 14.55 14.62 10.584 3.21503 4.51757 28.53 1484.32 1021.876 14.85 14.92 10.583 3.21620 4.51935 28.54 1484.34 1021.887 15.15 15.22 10.583 3.21552 4.51833 28.53 1484.34 1021.883 15.45 15.52 10.585 3.21667 4.51971 28.54 1484.36 1021.891 15.75 15.82 10.586 3.21703 4.52009 28.54 1484.37 1021.895 16.05 16.12 10.585 3.21692 4.52001 28.54 1484.37 1021.895 16.35 16.42 10.588 3.21698 4.51970 28.54 1484.39 1021.895 16.65 16.72 10.588 3.21732 4.52022 28.55 1484.40 1021.899 16.84 16.91 10.589 3.21716 4.51982 28.54 1484.40 1021.897