*2019/08/26 15:30:32.17 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/03/02 18:31:19.000 END TIME : UTC 2017/03/02 18:31:33.400 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 73 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 21.88 2 Depth metres 0.15 21.85 3 Temperature 'deg C (ITS90)' 7.388 7.561 4 Conductivity S/m 2.76903 2.83752 5 Conductance:Specific S/m 4.27392 4.35828 6 Salinity PSS-78 26.46 27.05 7 Speed:Sound m/s 1469.57 1471.29 8 Density kg/m^3 1020.66 1021.199 $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 : 310 LATITUDE : 49 17.53712 N ! (deg min) LONGITUDE : 123 3.53555 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 21:02:25 73 73 HDREDIT2 3.1.1 2017/12/13 11:33:18 ? ? CALIB 12.0 2019/08/26 15:30:32 73 73 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 21:02:25 -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_20170302_183119 % Cast time (UTC),2017-03-02 18:31:19 % Cast time (local),2017-03-02 18:31:19 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.2922853 % Start longitude,-123.0589259 % Start altitude,-19.020000457763672 % Start GPS horizontal error(Meter),7.619999885559082 % Start GPS vertical error(Meter),14.6899995803833 % Start GPS number of satellites,5 % End latitude,49.292025 % End longitude,-123.059111 % End altitude,-9.4799995422363281 % End GPS horizontal error(Meter),8.4399995803833 % End GPS vertical error(Meter),16.229999542236328 % End GPS number of satellites,5 % Cast duration (Seconds),65.4 % 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 7.393 2.77020 4.27589 26.48 1469.57 1020.668 0.45 0.45 7.393 2.76973 4.27525 26.47 1469.57 1020.666 0.75 0.75 7.395 2.76903 4.27392 26.46 1469.57 1020.660 1.05 1.05 7.396 2.77006 4.27538 26.48 1469.59 1020.669 1.35 1.35 7.394 2.77031 4.27591 26.48 1469.60 1020.673 1.65 1.65 7.393 2.77038 4.27617 26.48 1469.60 1020.676 1.95 1.95 7.390 2.76980 4.27572 26.48 1469.59 1020.675 2.25 2.25 7.388 2.76930 4.27516 26.47 1469.58 1020.673 2.55 2.55 7.389 2.76951 4.27540 26.47 1469.59 1020.676 2.85 2.85 7.390 2.76908 4.27465 26.47 1469.59 1020.673 3.15 3.15 7.390 2.76997 4.27592 26.48 1469.61 1020.681 3.45 3.45 7.392 2.77061 4.27671 26.48 1469.62 1020.687 3.75 3.75 7.392 2.77040 4.27636 26.48 1469.63 1020.686 4.05 4.04 7.394 2.77039 4.27614 26.48 1469.64 1020.686 4.35 4.34 7.396 2.77214 4.27854 26.50 1469.67 1020.700 4.65 4.64 7.399 2.77353 4.28025 26.51 1469.70 1020.711 4.95 4.94 7.406 2.77455 4.28093 26.51 1469.74 1020.715 5.25 5.24 7.413 2.77606 4.28233 26.52 1469.79 1020.724 5.55 5.54 7.419 2.77966 4.28713 26.56 1469.86 1020.751 5.85 5.84 7.423 2.77906 4.28556 26.55 1469.87 1020.744 6.15 6.14 7.429 2.78081 4.28753 26.56 1469.91 1020.756 6.45 6.44 7.433 2.78219 4.28913 26.57 1469.95 1020.765 6.75 6.74 7.437 2.78314 4.29008 26.58 1469.97 1020.772 7.05 7.04 7.442 2.78590 4.29360 26.60 1470.03 1020.792 7.35 7.34 7.446 2.78741 4.29549 26.62 1470.07 1020.803 7.65 7.64 7.447 2.78821 4.29658 26.62 1470.09 1020.810 7.95 7.94 7.448 2.78949 4.29846 26.64 1470.11 1020.822 8.25 8.24 7.450 2.78940 4.29800 26.63 1470.12 1020.820 8.55 8.54 7.451 2.79022 4.29914 26.64 1470.14 1020.828 8.85 8.84 7.452 2.78996 4.29854 26.64 1470.14 1020.826 9.15 9.14 7.453 2.78987 4.29826 26.64 1470.15 1020.826 9.45 9.44 7.456 2.79147 4.30042 26.65 1470.18 1020.838 9.75 9.74 7.461 2.79220 4.30090 26.65 1470.21 1020.842 10.05 10.04 7.465 2.79203 4.30002 26.65 1470.23 1020.839 10.35 10.34 7.464 2.79067 4.29808 26.64 1470.21 1020.830 10.65 10.64 7.464 2.79043 4.29770 26.63 1470.21 1020.829 10.95 10.94 7.465 2.79067 4.29799 26.64 1470.22 1020.832 11.25 11.23 7.468 2.79386 4.30247 26.66 1470.28 1020.857 11.55 11.53 7.475 2.79571 4.30434 26.68 1470.33 1020.868 11.85 11.83 7.479 2.79935 4.30948 26.71 1470.39 1020.897 12.15 12.13 7.484 2.79896 4.30825 26.71 1470.41 1020.891 12.45 12.43 7.490 2.80037 4.30963 26.72 1470.45 1020.900 12.75 12.73 7.495 2.80061 4.30934 26.71 1470.47 1020.900 13.05 13.03 7.496 2.80024 4.30860 26.71 1470.47 1020.897 13.35 13.33 7.498 2.80133 4.30994 26.72 1470.50 1020.906 13.65 13.63 7.501 2.80291 4.31205 26.73 1470.53 1020.918 13.95 13.93 7.502 2.80399 4.31357 26.75 1470.55 1020.927 14.25 14.23 7.503 2.80389 4.31328 26.74 1470.56 1020.927 14.55 14.53 7.505 2.80462 4.31416 26.75 1470.58 1020.933 14.85 14.83 7.505 2.80560 4.31559 26.76 1470.60 1020.942 15.15 15.13 7.508 2.80735 4.31797 26.77 1470.63 1020.956 15.45 15.43 7.512 2.80955 4.32081 26.80 1470.68 1020.973 15.75 15.73 7.515 2.81092 4.32254 26.81 1470.71 1020.983 16.05 16.03 7.517 2.81103 4.32237 26.81 1470.72 1020.983 16.35 16.33 7.519 2.81108 4.32227 26.81 1470.73 1020.984 16.65 16.63 7.520 2.81092 4.32178 26.80 1470.74 1020.983 16.95 16.93 7.520 2.81305 4.32513 26.82 1470.77 1021.002 17.25 17.23 7.521 2.81308 4.32499 26.82 1470.78 1021.003 17.55 17.52 7.521 2.81287 4.32463 26.82 1470.78 1021.002 17.85 17.82 7.522 2.81225 4.32358 26.81 1470.78 1020.998 18.15 18.12 7.522 2.81329 4.32516 26.82 1470.80 1021.007 18.45 18.42 7.525 2.81341 4.32506 26.82 1470.81 1021.008 18.75 18.72 7.526 2.81392 4.32558 26.83 1470.83 1021.012 19.05 19.02 7.529 2.81417 4.32569 26.83 1470.85 1021.014 19.35 19.32 7.533 2.81631 4.32845 26.85 1470.89 1021.030 19.65 19.62 7.534 2.81789 4.33071 26.86 1470.92 1021.043 19.95 19.92 7.530 2.81840 4.33198 26.87 1470.92 1021.052 20.25 20.22 7.530 2.82187 4.33738 26.91 1470.97 1021.082 20.55 20.52 7.534 2.82345 4.33927 26.92 1471.01 1021.093 20.85 20.82 7.539 2.82572 4.34205 26.94 1471.06 1021.109 21.15 21.12 7.542 2.83297 4.35279 27.02 1471.16 1021.168 21.45 21.42 7.553 2.83752 4.35828 27.05 1471.26 1021.199 21.88 21.85 7.561 2.83752 4.35719 27.05 1471.29 1021.194