*2019/08/26 15:30:31.85 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/03/02 18:19:04.000 END TIME : UTC 2017/03/02 18:19:18.000 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 71 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 21.05 2 Depth metres 0.15 21.02 3 Temperature 'deg C (ITS90)' 7.357 7.526 4 Conductivity S/m 2.75244 2.818 5 Conductance:Specific S/m 4.25321 4.33214 6 Salinity PSS-78 26.32 26.87 7 Speed:Sound m/s 1469.23 1470.91 8 Density kg/m^3 1020.547 1021.055 $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 : 305 LATITUDE : 49 18.22286 N ! (deg min) LONGITUDE : 123 3.70982 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 20:57:36 71 71 HDREDIT2 3.1.1 2017/12/13 11:33:17 ? ? CALIB 12.0 2019/08/26 15:30:31 71 71 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 20:57:35 -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 15:30:31 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_20170302_181904 % Cast time (UTC),2017-03-02 18:19:04 % Cast time (local),2017-03-02 18:19:04 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.3037143 % Start longitude,-123.0618304 % Start altitude,-11.180000305175781 % Start GPS horizontal error(Meter),4.8000001907348633 % Start GPS vertical error(Meter),7.0100002288818359 % Start GPS number of satellites,6 % End latitude,49.3037159 % End longitude,-123.061979 % End altitude,-15.319999694824219 % End GPS horizontal error(Meter),5.9200000762939453 % End GPS vertical error(Meter),8.9399995803833 % End GPS number of satellites,6 % Cast duration (Seconds),60.4 % 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 7.357 2.75244 4.25321 26.32 1469.23 1020.547 0.45 0.45 7.367 2.75685 4.25875 26.36 1469.32 1020.578 0.75 0.75 7.375 2.75959 4.26187 26.38 1469.39 1020.596 1.05 1.05 7.382 2.76226 4.26504 26.40 1469.45 1020.614 1.35 1.35 7.383 2.76578 4.27043 26.44 1469.50 1020.644 1.65 1.65 7.382 2.76640 4.27150 26.45 1469.51 1020.651 1.95 1.95 7.381 2.76704 4.27264 26.45 1469.52 1020.658 2.25 2.25 7.381 2.76710 4.27274 26.45 1469.53 1020.660 2.55 2.55 7.381 2.76742 4.27319 26.46 1469.54 1020.664 2.85 2.85 7.382 2.76776 4.27359 26.46 1469.55 1020.667 3.15 3.15 7.383 2.76755 4.27319 26.46 1469.55 1020.667 3.45 3.45 7.383 2.76788 4.27362 26.46 1469.56 1020.670 3.75 3.75 7.384 2.76800 4.27378 26.46 1469.57 1020.672 4.05 4.04 7.384 2.76852 4.27451 26.47 1469.58 1020.678 4.35 4.34 7.385 2.76840 4.27426 26.46 1469.59 1020.677 4.65 4.64 7.385 2.76861 4.27455 26.47 1469.60 1020.680 4.95 4.94 7.386 2.76830 4.27396 26.46 1469.60 1020.678 5.25 5.24 7.385 2.76847 4.27431 26.46 1469.61 1020.682 5.55 5.54 7.386 2.76931 4.27548 26.47 1469.62 1020.689 5.85 5.84 7.386 2.76931 4.27546 26.47 1469.63 1020.690 6.15 6.14 7.387 2.76981 4.27610 26.48 1469.64 1020.695 6.45 6.44 7.388 2.76987 4.27605 26.48 1469.65 1020.696 6.75 6.74 7.391 2.77027 4.27630 26.48 1469.67 1020.699 7.05 7.04 7.394 2.77129 4.27753 26.49 1469.70 1020.707 7.35 7.34 7.397 2.77313 4.27986 26.50 1469.74 1020.720 7.65 7.64 7.403 2.77827 4.28701 26.55 1469.83 1020.760 7.95 7.94 7.410 2.78048 4.28952 26.57 1469.88 1020.774 8.25 8.24 7.417 2.78156 4.29033 26.58 1469.92 1020.780 8.55 8.54 7.423 2.78276 4.29130 26.58 1469.96 1020.786 8.85 8.84 7.429 2.78456 4.29338 26.60 1470.00 1020.799 9.15 9.14 7.434 2.78520 4.29368 26.60 1470.03 1020.801 9.45 9.44 7.439 2.78655 4.29500 26.61 1470.07 1020.810 9.75 9.74 7.445 2.78734 4.29555 26.62 1470.10 1020.814 10.05 10.04 7.446 2.78851 4.29716 26.63 1470.12 1020.824 10.35 10.34 7.447 2.78983 4.29902 26.64 1470.15 1020.835 10.65 10.64 7.452 2.79091 4.30012 26.65 1470.18 1020.842 10.95 10.94 7.455 2.79182 4.30105 26.65 1470.21 1020.848 11.25 11.23 7.457 2.79162 4.30043 26.65 1470.22 1020.846 11.55 11.54 7.459 2.79207 4.30093 26.65 1470.23 1020.850 11.85 11.83 7.460 2.79150 4.29994 26.65 1470.23 1020.846 12.15 12.13 7.460 2.79190 4.30047 26.65 1470.24 1020.850 12.45 12.43 7.461 2.79207 4.30064 26.65 1470.25 1020.852 12.75 12.73 7.462 2.79196 4.30042 26.65 1470.26 1020.853 13.05 13.03 7.463 2.79220 4.30053 26.65 1470.27 1020.854 13.35 13.33 7.467 2.79249 4.30048 26.65 1470.29 1020.855 13.65 13.63 7.471 2.79279 4.30044 26.65 1470.31 1020.856 13.95 13.93 7.475 2.79472 4.30284 26.67 1470.35 1020.870 14.25 14.23 7.479 2.79966 4.30995 26.72 1470.43 1020.910 14.55 14.53 7.483 2.80443 4.31672 26.76 1470.51 1020.947 14.85 14.83 7.487 2.80612 4.31881 26.78 1470.55 1020.960 15.15 15.13 7.493 2.80709 4.31957 26.78 1470.59 1020.965 15.45 15.43 7.497 2.80787 4.32017 26.79 1470.61 1020.969 15.75 15.73 7.500 2.80905 4.32162 26.80 1470.64 1020.978 16.05 16.03 7.501 2.81020 4.32323 26.81 1470.66 1020.988 16.35 16.33 7.504 2.81065 4.32356 26.81 1470.68 1020.991 16.65 16.63 7.506 2.81110 4.32394 26.82 1470.70 1020.995 16.95 16.93 7.508 2.81089 4.32339 26.81 1470.71 1020.993 17.25 17.23 7.510 2.81092 4.32322 26.81 1470.72 1020.993 17.55 17.53 7.511 2.81133 4.32372 26.81 1470.73 1020.997 17.85 17.82 7.512 2.81198 4.32453 26.82 1470.75 1021.003 18.15 18.12 7.514 2.81166 4.32377 26.81 1470.76 1021.000 18.45 18.42 7.515 2.81185 4.32399 26.82 1470.76 1021.003 18.75 18.72 7.514 2.81195 4.32423 26.82 1470.77 1021.005 19.05 19.02 7.513 2.81258 4.32533 26.82 1470.78 1021.012 19.35 19.32 7.513 2.81556 4.32987 26.86 1470.82 1021.038 19.65 19.62 7.518 2.81668 4.33095 26.86 1470.86 1021.045 19.95 19.92 7.519 2.81713 4.33154 26.87 1470.87 1021.049 20.25 20.22 7.521 2.81756 4.33185 26.87 1470.89 1021.052 20.55 20.52 7.524 2.81800 4.33214 26.87 1470.91 1021.055 20.85 20.82 7.526 2.81719 4.33073 26.86 1470.90 1021.049 21.05 21.02 7.526 2.81717 4.33062 26.86 1470.91 1021.049