*2019/08/26 15:30:28.97 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/02/28 17:10:29.000 END TIME : UTC 2017/02/28 17:10:40.200 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 17.04 2 Depth metres 0.15 17 3 Temperature 'deg C (ITS90)' 7.589 7.722 4 Conductivity S/m 2.84763 2.88567 5 Conductance:Specific S/m 4.36895 4.40975 6 Salinity PSS-78 27.14 27.43 7 Speed:Sound m/s 1471.19 1472.29 8 Density kg/m^3 1021.168 1021.45 $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 : 261 LATITUDE : 49 18.63524 N ! (deg min) LONGITUDE : 123 5.75701 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 20:15:24 57 57 HDREDIT2 3.1.1 2017/12/13 11:33:16 ? ? CALIB 12.0 2019/08/26 15:30:28 57 57 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 20:15:24 -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 15:30:28 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_171029 % Cast time (UTC),2017-02-28 17:10:29 % Cast time (local),2017-02-28 17:10:29 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.3105874 % Start longitude,-123.0959502 % Start altitude,-16.6200008392334 % Start GPS horizontal error(Meter),8.7700004577636719 % Start GPS vertical error(Meter),7.8299999237060547 % Start GPS number of satellites,6 % End latitude,49.3107149 % End longitude,-123.0960267 % End altitude,-18.670000076293945 % End GPS horizontal error(Meter),68.959999084472656 % End GPS vertical error(Meter),59.75 % End GPS number of satellites,6 % Cast duration (Seconds),86.6 % 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 7.599 2.84906 4.36982 27.15 1471.21 1021.168 0.45 0.45 7.599 2.84889 4.36959 27.15 1471.21 1021.168 0.75 0.75 7.600 2.84985 4.37092 27.16 1471.23 1021.176 1.05 1.05 7.599 2.84948 4.37047 27.15 1471.23 1021.175 1.35 1.35 7.597 2.84915 4.37031 27.15 1471.22 1021.176 1.65 1.65 7.594 2.84886 4.37019 27.15 1471.21 1021.176 1.95 1.95 7.591 2.84778 4.36895 27.14 1471.20 1021.171 2.25 2.25 7.589 2.84763 4.36903 27.14 1471.19 1021.173 2.55 2.54 7.592 2.84791 4.36902 27.14 1471.21 1021.174 2.85 2.85 7.598 2.84999 4.37147 27.16 1471.26 1021.188 3.15 3.14 7.605 2.85261 4.37443 27.18 1471.32 1021.205 3.45 3.44 7.610 2.85306 4.37448 27.18 1471.35 1021.207 3.75 3.74 7.614 2.85413 4.37560 27.19 1471.38 1021.214 4.05 4.04 7.620 2.85490 4.37600 27.19 1471.41 1021.217 4.35 4.34 7.626 2.85606 4.37695 27.20 1471.44 1021.224 4.65 4.64 7.630 2.85678 4.37751 27.20 1471.47 1021.228 4.95 4.94 7.633 2.86128 4.38399 27.25 1471.54 1021.264 5.25 5.24 7.639 2.86389 4.38721 27.27 1471.60 1021.282 5.55 5.54 7.647 2.86700 4.39088 27.30 1471.67 1021.303 5.85 5.84 7.657 2.86884 4.39236 27.31 1471.73 1021.312 6.15 6.14 7.674 2.87457 4.39884 27.36 1471.85 1021.348 6.45 6.44 7.688 2.87786 4.40203 27.38 1471.94 1021.366 6.75 6.74 7.690 2.87872 4.40312 27.39 1471.96 1021.373 7.05 7.04 7.690 2.87836 4.40244 27.38 1471.96 1021.371 7.35 7.34 7.693 2.87767 4.40111 27.37 1471.97 1021.365 7.65 7.64 7.695 2.87660 4.39908 27.36 1471.97 1021.355 7.95 7.93 7.699 2.87909 4.40241 27.38 1472.01 1021.375 8.25 8.23 7.696 2.88137 4.40629 27.41 1472.04 1021.397 8.55 8.53 7.694 2.88051 4.40529 27.40 1472.03 1021.393 8.85 8.83 7.694 2.87725 4.40022 27.37 1471.99 1021.367 9.15 9.13 7.699 2.87879 4.40199 27.38 1472.03 1021.377 9.45 9.43 7.705 2.87990 4.40283 27.39 1472.07 1021.383 9.75 9.73 7.712 2.88086 4.40337 27.39 1472.10 1021.387 10.05 10.03 7.715 2.88247 4.40537 27.40 1472.14 1021.399 10.35 10.33 7.716 2.88306 4.40626 27.41 1472.15 1021.405 10.65 10.63 7.714 2.88264 4.40583 27.41 1472.15 1021.404 10.95 10.93 7.712 2.88305 4.40667 27.41 1472.15 1021.410 11.25 11.23 7.712 2.88208 4.40530 27.40 1472.14 1021.404 11.55 11.53 7.712 2.88173 4.40469 27.40 1472.14 1021.402 11.85 11.83 7.712 2.88229 4.40556 27.40 1472.15 1021.408 12.15 12.13 7.712 2.88216 4.40541 27.40 1472.16 1021.408 12.45 12.43 7.708 2.88201 4.40570 27.40 1472.15 1021.411 12.75 12.73 7.709 2.88253 4.40629 27.41 1472.16 1021.416 13.05 13.03 7.714 2.88318 4.40664 27.41 1472.19 1021.419 13.35 13.32 7.715 2.88288 4.40602 27.41 1472.20 1021.417 13.65 13.62 7.715 2.88295 4.40618 27.41 1472.20 1021.419 13.95 13.92 7.711 2.88271 4.40640 27.41 1472.19 1021.422 14.25 14.22 7.712 2.88286 4.40642 27.41 1472.20 1021.423 14.55 14.52 7.711 2.88293 4.40662 27.41 1472.20 1021.425 14.85 14.82 7.715 2.88280 4.40586 27.41 1472.22 1021.422 15.15 15.12 7.718 2.88337 4.40638 27.41 1472.24 1021.426 15.45 15.42 7.716 2.88331 4.40659 27.41 1472.24 1021.429 15.75 15.72 7.716 2.88303 4.40621 27.41 1472.24 1021.428 16.05 16.02 7.714 2.88391 4.40774 27.42 1472.25 1021.438 16.35 16.32 7.719 2.88567 4.40975 27.43 1472.29 1021.450 16.65 16.62 7.722 2.88418 4.40710 27.41 1472.28 1021.437 17.04 17.00 7.719 2.88375 4.40683 27.41 1472.28 1021.437