*2019/08/26 15:30:35.91 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/05/08 21:28:12.000 END TIME : UTC 2017/05/08 21:28:20.200 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 42 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 12.54 2 Depth metres 0.15 12.48 3 Temperature 'deg C (ITS90)' 8.363 9.223 4 Conductivity S/m 3.35099 3.39758 5 Conductance:Specific S/m 4.96296 5.02403 6 Salinity PSS-78 31.49 31.79 7 Speed:Sound m/s 1480.05 1482.73 8 Density kg/m^3 1024.341 1024.757 $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 : 514 LATITUDE : 52 42.80104 N ! (deg min) LONGITUDE : 131 34.75514 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 2017/12/09 00:25:52 42 42 HDREDIT2 3.1.1 2017/12/13 11:33:20 ? ? CALIB 12.0 2019/08/26 15:30:35 42 42 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/09 00:25:51 -HEADER EDITS: 2017/12/13 11:33:20 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 15:30:35 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_20170508_212812 % Cast time (UTC),2017-05-08 21:28:12 % Cast time (local),2017-05-08 21:28:12 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,52.7133507 % Start longitude,-131.5792524 % Start altitude,-23.049999237060547 % Start GPS horizontal error(Meter),2.309999942779541 % Start GPS vertical error(Meter),5.1399998664855957 % 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),122 % 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 9.223 3.39758 4.96394 31.50 1482.73 1024.343 0.45 0.45 9.186 3.39330 4.96296 31.49 1482.58 1024.341 0.75 0.75 9.018 3.38845 4.98045 31.59 1482.08 1024.446 1.05 1.04 8.951 3.37655 4.97261 31.52 1481.76 1024.407 1.35 1.34 8.943 3.37560 4.97252 31.52 1481.73 1024.408 1.65 1.64 8.928 3.37546 4.97449 31.53 1481.70 1024.421 1.95 1.94 8.942 3.37693 4.97454 31.53 1481.76 1024.422 2.25 2.24 8.956 3.37871 4.97519 31.54 1481.82 1024.426 2.55 2.54 8.912 3.37740 4.97964 31.56 1481.69 1024.454 2.85 2.83 8.867 3.36737 4.97144 31.50 1481.45 1024.412 3.15 3.13 8.851 3.36973 4.97733 31.54 1481.44 1024.446 3.45 3.43 8.851 3.37279 4.98179 31.57 1481.49 1024.472 3.75 3.73 8.858 3.37684 4.98675 31.61 1481.56 1024.500 4.05 4.03 8.870 3.37425 4.98118 31.57 1481.57 1024.470 4.35 4.33 8.819 3.37508 4.98993 31.62 1481.45 1024.521 4.65 4.63 8.787 3.37362 4.99247 31.63 1481.35 1024.538 4.95 4.92 8.768 3.37291 4.99417 31.64 1481.30 1024.549 5.25 5.22 8.765 3.37330 4.99523 31.65 1481.30 1024.556 5.55 5.52 8.757 3.37241 4.99510 31.65 1481.27 1024.557 5.85 5.82 8.736 3.37114 4.99642 31.65 1481.20 1024.567 6.15 6.12 8.720 3.37158 4.99940 31.67 1481.17 1024.585 6.45 6.42 8.711 3.37161 5.00075 31.68 1481.15 1024.594 6.75 6.71 8.700 3.37123 5.00184 31.69 1481.12 1024.601 7.05 7.01 8.684 3.37081 5.00361 31.70 1481.08 1024.613 7.35 7.31 8.661 3.36984 5.00552 31.71 1481.01 1024.625 7.65 7.61 8.650 3.36895 5.00584 31.71 1480.98 1024.629 7.95 7.91 8.648 3.36916 5.00647 31.71 1480.98 1024.634 8.25 8.21 8.625 3.36728 5.00717 31.71 1480.90 1024.640 8.55 8.50 8.589 3.36613 5.01076 31.73 1480.79 1024.662 8.85 8.80 8.574 3.36565 5.01233 31.74 1480.75 1024.672 9.15 9.10 8.566 3.36506 5.01254 31.74 1480.73 1024.675 9.45 9.40 8.557 3.36418 5.01262 31.74 1480.70 1024.677 9.75 9.70 8.544 3.36412 5.01448 31.75 1480.67 1024.689 10.05 10.00 8.520 3.36312 5.01652 31.76 1480.60 1024.702 10.35 10.29 8.491 3.36169 5.01877 31.77 1480.51 1024.716 10.65 10.59 8.457 3.35994 5.02123 31.79 1480.40 1024.732 10.95 10.89 8.431 3.35296 5.01469 31.73 1480.24 1024.698 11.25 11.19 8.392 3.35138 5.01820 31.75 1480.12 1024.720 11.55 11.49 8.373 3.35199 5.02205 31.78 1480.08 1024.743 11.85 11.79 8.364 3.35099 5.02190 31.77 1480.05 1024.744 12.15 12.09 8.365 3.35252 5.02403 31.79 1480.08 1024.757 12.54 12.48 8.363 3.35219 5.02385 31.79 1480.08 1024.757