*2019/08/26 15:30:32.86 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/03/03 00:39:17.000 END TIME : UTC 2017/03/03 00:39:29.800 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 65 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 19.4 2 Depth metres 0.15 19.38 3 Temperature 'deg C (ITS90)' 7.423 7.699 4 Conductivity S/m 2.7319 2.89561 5 Conductance:Specific S/m 4.21285 4.42822 6 Salinity PSS-78 26.05 27.55 7 Speed:Sound m/s 1469.16 1472.4 8 Density kg/m^3 1020.33 1021.558 $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 : 322 LATITUDE : 49 18.21161 N ! (deg min) LONGITUDE : 123 3.67928 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 21:14:05 65 65 HDREDIT2 3.1.1 2017/12/13 11:33:18 ? ? CALIB 12.0 2019/08/26 15:30:32 65 65 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 21:14:05 -HEADER EDITS: 2017/12/13 11:33:18 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 15:30:32 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_20170303_003917 % Cast time (UTC),2017-03-03 00:39:17 % Cast time (local),2017-03-03 00:39:17 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.3035268 % Start longitude,-123.0613214 % Start altitude,-17.229999542236328 % Start GPS horizontal error(Meter),11.239999771118164 % Start GPS vertical error(Meter),12.359999656677246 % Start GPS number of satellites,5 % End latitude,49.3035772 % End longitude,-123.0616118 % End altitude,-17.8799991607666 % End GPS horizontal error(Meter),10.930000305175781 % End GPS vertical error(Meter),11.949999809265137 % End GPS number of satellites,5 % Cast duration (Seconds),59 % 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 7.423 2.73190 4.21285 26.05 1469.16 1020.330 0.45 0.45 7.427 2.73259 4.21341 26.06 1469.19 1020.335 0.75 0.75 7.429 2.73312 4.21404 26.06 1469.20 1020.339 1.05 1.05 7.432 2.73560 4.21742 26.09 1469.25 1020.359 1.35 1.35 7.435 2.73731 4.21966 26.10 1469.29 1020.372 1.65 1.65 7.438 2.73882 4.22160 26.11 1469.32 1020.383 1.95 1.95 7.440 2.74088 4.22450 26.13 1469.36 1020.400 2.25 2.25 7.443 2.74149 4.22514 26.14 1469.38 1020.405 2.55 2.55 7.445 2.74333 4.22763 26.16 1469.41 1020.419 2.85 2.85 7.446 2.74418 4.22885 26.16 1469.43 1020.427 3.15 3.15 7.449 2.74426 4.22863 26.16 1469.45 1020.427 3.45 3.45 7.450 2.74589 4.23101 26.18 1469.47 1020.441 3.75 3.75 7.451 2.74631 4.23148 26.18 1469.49 1020.445 4.05 4.05 7.453 2.74664 4.23175 26.18 1469.50 1020.448 4.35 4.35 7.455 2.74797 4.23353 26.20 1469.53 1020.459 4.65 4.64 7.456 2.75014 4.23666 26.22 1469.57 1020.477 4.95 4.95 7.458 2.75163 4.23878 26.23 1469.60 1020.489 5.25 5.25 7.461 2.75245 4.23963 26.24 1469.62 1020.495 5.55 5.54 7.463 2.75321 4.24049 26.24 1469.64 1020.501 5.85 5.84 7.466 2.75370 4.24093 26.25 1469.66 1020.504 6.15 6.14 7.467 2.75575 4.24391 26.27 1469.70 1020.522 6.45 6.44 7.468 2.75826 4.24769 26.29 1469.74 1020.543 6.75 6.74 7.470 2.76102 4.25165 26.32 1469.79 1020.566 7.05 7.04 7.471 2.76308 4.25470 26.34 1469.82 1020.583 7.35 7.34 7.472 2.76482 4.25722 26.36 1469.85 1020.598 7.65 7.64 7.474 2.76586 4.25862 26.37 1469.87 1020.607 7.95 7.94 7.474 2.76569 4.25834 26.37 1469.88 1020.606 8.25 8.24 7.474 2.76672 4.25986 26.38 1469.90 1020.616 8.55 8.54 7.475 2.76804 4.26181 26.39 1469.92 1020.628 8.85 8.84 7.479 2.76940 4.26342 26.40 1469.95 1020.637 9.15 9.14 7.481 2.77164 4.26653 26.42 1469.99 1020.655 9.45 9.44 7.482 2.77317 4.26873 26.44 1470.02 1020.668 9.75 9.74 7.485 2.77476 4.27085 26.45 1470.06 1020.681 10.05 10.04 7.487 2.77682 4.27368 26.47 1470.10 1020.697 10.35 10.34 7.492 2.77761 4.27426 26.48 1470.12 1020.702 10.65 10.64 7.499 2.78013 4.27723 26.50 1470.18 1020.719 10.95 10.94 7.504 2.78732 4.28762 26.57 1470.30 1020.775 11.25 11.24 7.512 2.79222 4.29420 26.61 1470.39 1020.812 11.55 11.54 7.518 2.79638 4.29977 26.65 1470.46 1020.843 11.85 11.84 7.523 2.79856 4.30240 26.67 1470.51 1020.858 12.15 12.14 7.529 2.80268 4.30791 26.71 1470.59 1020.889 12.45 12.44 7.534 2.80582 4.31209 26.74 1470.65 1020.912 12.75 12.73 7.540 2.80946 4.31691 26.77 1470.72 1020.940 13.05 13.04 7.546 2.81304 4.32164 26.81 1470.79 1020.966 13.35 13.33 7.550 2.81760 4.32812 26.85 1470.86 1021.002 13.65 13.63 7.557 2.82140 4.33307 26.89 1470.94 1021.030 13.95 13.93 7.567 2.82498 4.33716 26.91 1471.02 1021.053 14.25 14.23 7.575 2.82941 4.34292 26.95 1471.11 1021.085 14.55 14.53 7.584 2.83346 4.34792 26.99 1471.19 1021.113 14.85 14.83 7.594 2.83653 4.35130 27.02 1471.26 1021.132 15.15 15.13 7.606 2.84356 4.36050 27.08 1471.39 1021.182 15.45 15.43 7.621 2.85412 4.37470 27.18 1471.58 1021.260 15.75 15.73 7.636 2.86063 4.38267 27.23 1471.71 1021.303 16.05 16.03 7.645 2.86548 4.38881 27.28 1471.81 1021.337 16.35 16.33 7.655 2.86775 4.39104 27.30 1471.87 1021.351 16.65 16.63 7.664 2.87419 4.39960 27.36 1471.99 1021.398 16.95 16.93 7.672 2.88338 4.41267 27.45 1472.13 1021.469 17.25 17.23 7.677 2.88968 4.42154 27.51 1472.23 1021.518 17.55 17.53 7.683 2.89367 4.42691 27.54 1472.31 1021.548 17.85 17.83 7.690 2.89512 4.42814 27.55 1472.35 1021.556 18.15 18.12 7.695 2.89558 4.42822 27.55 1472.38 1021.557 18.45 18.42 7.697 2.89510 4.42722 27.55 1472.38 1021.553 18.75 18.72 7.698 2.89561 4.42780 27.55 1472.40 1021.558 19.05 19.02 7.698 2.89489 4.42669 27.54 1472.39 1021.553 19.40 19.38 7.699 2.89504 4.42687 27.55 1472.40 1021.555