*2019/08/26 15:30:29.02 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/02/28 17:19:11.000 END TIME : UTC 2017/02/28 17:19:24.600 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 69 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 20.56 2 Depth metres 0.15 20.52 3 Temperature 'deg C (ITS90)' 7.619 7.724 4 Conductivity S/m 2.84664 2.88857 5 Conductance:Specific S/m 4.36351 4.41363 6 Salinity PSS-78 27.11 27.46 7 Speed:Sound m/s 1471.23 1472.41 8 Density kg/m^3 1021.133 1021.489 $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 : 262 LATITUDE : 49 18.44428 N ! (deg min) LONGITUDE : 123 4.91922 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 20:16:16 69 69 HDREDIT2 3.1.1 2017/12/13 11:33:16 ? ? CALIB 12.0 2019/08/26 15:30:29 69 69 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 20:16:15 -HEADER EDITS: 2017/12/13 11:33:16 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_171911 % Cast time (UTC),2017-02-28 17:19:11 % Cast time (local),2017-02-28 17:19:11 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.3074046 % Start longitude,-123.081987 % Start altitude,-21.969999313354492 % Start GPS horizontal error(Meter),11.229999542236328 % Start GPS vertical error(Meter),8.8599996566772461 % Start GPS number of satellites,6 % End latitude,49.3076415 % End longitude,-123.0822352 % End altitude,-21.299999237060547 % End GPS horizontal error(Meter),23.190000534057617 % End GPS vertical error(Meter),18.6200008392334 % End GPS number of satellites,6 % Cast duration (Seconds),80.2 % 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 7.619 2.84664 4.36351 27.11 1471.23 1021.133 0.45 0.45 7.624 2.84832 4.36535 27.12 1471.28 1021.145 0.75 0.75 7.629 2.85112 4.36898 27.15 1471.33 1021.165 1.05 1.05 7.635 2.85278 4.37071 27.16 1471.38 1021.176 1.35 1.35 7.640 2.85209 4.36904 27.15 1471.39 1021.168 1.65 1.65 7.642 2.85856 4.37868 27.21 1471.48 1021.221 1.95 1.95 7.638 2.85775 4.37792 27.21 1471.46 1021.218 2.25 2.25 7.639 2.85774 4.37778 27.21 1471.47 1021.219 2.55 2.54 7.639 2.85809 4.37834 27.21 1471.48 1021.223 2.85 2.85 7.644 2.85920 4.37933 27.22 1471.52 1021.230 3.15 3.14 7.643 2.85863 4.37857 27.21 1471.51 1021.227 3.45 3.44 7.643 2.85943 4.37988 27.22 1471.52 1021.235 3.75 3.74 7.648 2.85946 4.37920 27.22 1471.54 1021.233 4.05 4.04 7.648 2.85863 4.37790 27.21 1471.54 1021.227 4.35 4.34 7.650 2.86154 4.38217 27.24 1471.59 1021.251 4.65 4.64 7.663 2.86370 4.38373 27.25 1471.66 1021.261 4.95 4.94 7.671 2.86411 4.38332 27.25 1471.69 1021.260 5.25 5.24 7.673 2.86399 4.38283 27.25 1471.70 1021.258 5.55 5.54 7.672 2.86385 4.38271 27.24 1471.70 1021.259 5.85 5.84 7.669 2.86458 4.38419 27.25 1471.71 1021.268 6.15 6.14 7.671 2.86477 4.38425 27.25 1471.72 1021.270 6.45 6.44 7.675 2.86513 4.38432 27.25 1471.74 1021.271 6.75 6.74 7.678 2.86559 4.38463 27.26 1471.76 1021.274 7.05 7.04 7.680 2.86566 4.38444 27.26 1471.77 1021.274 7.35 7.34 7.681 2.86630 4.38528 27.26 1471.79 1021.280 7.65 7.64 7.682 2.86663 4.38564 27.27 1471.80 1021.283 7.95 7.93 7.685 2.86726 4.38620 27.27 1471.82 1021.288 8.25 8.23 7.685 2.86614 4.38447 27.26 1471.81 1021.280 8.55 8.53 7.685 2.86636 4.38482 27.26 1471.82 1021.283 8.85 8.83 7.686 2.86571 4.38366 27.25 1471.82 1021.278 9.15 9.13 7.686 2.86602 4.38423 27.25 1471.82 1021.282 9.45 9.43 7.684 2.86624 4.38475 27.26 1471.83 1021.286 9.75 9.73 7.684 2.86728 4.38629 27.27 1471.85 1021.296 10.05 10.03 7.687 2.86851 4.38784 27.28 1471.88 1021.306 10.35 10.33 7.693 2.86988 4.38915 27.29 1471.91 1021.314 10.65 10.63 7.694 2.87066 4.39022 27.30 1471.93 1021.321 10.95 10.93 7.692 2.87071 4.39052 27.30 1471.93 1021.324 11.25 11.23 7.695 2.87098 4.39059 27.30 1471.95 1021.325 11.55 11.53 7.698 2.87126 4.39057 27.30 1471.97 1021.326 11.85 11.83 7.697 2.87087 4.39010 27.30 1471.96 1021.325 12.15 12.13 7.695 2.87130 4.39104 27.30 1471.97 1021.332 12.45 12.43 7.697 2.87253 4.39259 27.31 1472.00 1021.341 12.75 12.73 7.702 2.87259 4.39213 27.31 1472.01 1021.340 13.05 13.03 7.704 2.87260 4.39188 27.31 1472.02 1021.340 13.35 13.32 7.698 2.87208 4.39183 27.31 1472.01 1021.341 13.65 13.62 7.697 2.87281 4.39311 27.32 1472.02 1021.349 13.95 13.92 7.703 2.87286 4.39238 27.31 1472.04 1021.346 14.25 14.22 7.705 2.87227 4.39119 27.30 1472.04 1021.341 14.55 14.52 7.703 2.87256 4.39185 27.31 1472.05 1021.346 14.85 14.82 7.702 2.87178 4.39076 27.30 1472.04 1021.342 15.15 15.12 7.703 2.87273 4.39211 27.31 1472.06 1021.350 15.45 15.42 7.704 2.87271 4.39202 27.31 1472.06 1021.351 15.75 15.72 7.705 2.87281 4.39201 27.31 1472.07 1021.352 16.05 16.02 7.704 2.87274 4.39203 27.31 1472.07 1021.354 16.35 16.32 7.701 2.87273 4.39237 27.31 1472.07 1021.357 16.65 16.62 7.706 2.87383 4.39340 27.32 1472.11 1021.363 16.95 16.92 7.710 2.87405 4.39319 27.32 1472.12 1021.364 17.25 17.22 7.714 2.87369 4.39218 27.31 1472.13 1021.359 17.55 17.52 7.714 2.87466 4.39368 27.32 1472.15 1021.369 17.85 17.82 7.716 2.87634 4.39595 27.34 1472.18 1021.382 18.15 18.12 7.722 2.87629 4.39503 27.33 1472.21 1021.378 18.45 18.41 7.724 2.87702 4.39595 27.34 1472.22 1021.385 18.75 18.71 7.721 2.87693 4.39621 27.34 1472.22 1021.387 19.05 19.01 7.717 2.87728 4.39723 27.34 1472.22 1021.394 19.35 19.31 7.721 2.87753 4.39710 27.34 1472.24 1021.395 19.65 19.61 7.724 2.87747 4.39660 27.34 1472.25 1021.393 19.95 19.91 7.724 2.88004 4.40046 27.37 1472.29 1021.415 20.25 20.21 7.723 2.87944 4.39973 27.36 1472.28 1021.413 20.56 20.52 7.723 2.88857 4.41363 27.46 1472.41 1021.489