*2017/12/13 11:31:17.94 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2016/07/18 19:10:45.000 END TIME : UTC 2016/07/18 19:10:57.400 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 63 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 6 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 18.751 2 Depth metres 0.15 18.708 3 Temperature 'deg C (ITS90)' 11.874 12.697 4 Salinity PSS-78 28.678 29.254 5 Speed:Sound m/s 1489.838 1491.902 6 Density kg/m^3 1021.619 1022.239 $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 ' ' 7 F R4 2 5 -99 ' ' 8 F R4 2 6 -99 ' ' 9 F R4 3 $END *ADMINISTRATION MISSION : 2016-98 AGENCY : Canadian Hydrographic Service COUNTRY : Canada PROJECT : CHS CTD Data Acquisition SCIENTIST : Dangerfield N. *LOCATION EVENT NUMBER : 606 LATITUDE : 48 46.10223 N ! (deg min) LONGITUDE : 123 33.71253 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 01:56:28 63 63 HDREDIT2 3.1.1 2017/12/13 11:31:17 ? ? $END $REMARKS -READ_CHS_CTDS processing: 2017/12/09 01:56:27 -HEADER EDITS: 2017/12/13 11:31:17 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: Salinity [PSS-78] Format: F10.3 ==> F7.2 Channel 6: Density [kg/m^3] Format: F10.3 ==> F9.3 Channel 5: Speed:Sound [m/s] Format: F10.3 ==> F8.2 $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_20160718_191045 % Cast time (UTC),2016-07-18 19:10:45 % Cast time (local),2016-07-18 19:10:45 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,48.7683705 % Start longitude,-123.5618755 % Start altitude,-25.909999847412109 % Start GPS horizontal error(Meter),2.6700000762939453 % Start GPS vertical error(Meter),3.440000057220459 % Start GPS number of satellites,6 % End latitude,48.7686563 % End longitude,-123.5618561 % End altitude,-36.270000457763672 % End GPS horizontal error(Meter),16.219999313354492 % End GPS vertical error(Meter),15.960000038146973 % End GPS number of satellites,7 % Cast duration (Seconds),73.4 % 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”. !--1--- --2--- ---3--- --4--- ---5--- ---6---- !Pressu Depth Tempera Salini Speed: Density !re ture ty Sound !------ ------ ------- ------ ------- -------- *END OF HEADER 0.15 0.15 12.436 28.88 1491.04 1021.766 0.45 0.45 12.386 28.92 1490.91 1021.804 0.75 0.75 12.356 28.94 1490.84 1021.829 1.05 1.05 12.350 28.94 1490.82 1021.830 1.35 1.35 12.335 28.95 1490.79 1021.844 1.65 1.65 12.335 28.96 1490.80 1021.849 1.95 1.95 12.380 28.92 1490.92 1021.813 2.25 2.25 12.439 28.88 1491.08 1021.773 2.55 2.54 12.468 28.86 1491.15 1021.749 2.85 2.84 12.484 28.84 1491.20 1021.740 3.15 3.14 12.474 28.85 1491.18 1021.747 3.45 3.44 12.458 28.86 1491.14 1021.762 3.75 3.74 12.425 28.89 1491.06 1021.787 4.05 4.04 12.389 28.91 1490.97 1021.815 4.35 4.34 12.354 28.93 1490.88 1021.838 4.65 4.64 12.348 28.93 1490.85 1021.835 4.95 4.94 12.322 28.94 1490.79 1021.855 5.25 5.24 12.307 28.95 1490.75 1021.863 5.55 5.54 12.302 28.95 1490.74 1021.866 5.85 5.84 12.298 28.96 1490.74 1021.876 6.15 6.14 12.313 28.94 1490.78 1021.862 6.45 6.43 12.317 28.94 1490.80 1021.860 6.75 6.73 12.309 28.95 1490.79 1021.872 7.05 7.03 12.319 28.94 1490.81 1021.863 7.35 7.33 12.337 28.93 1490.86 1021.849 7.65 7.63 12.369 28.91 1490.96 1021.831 7.95 7.93 12.386 28.89 1491.00 1021.818 8.25 8.23 12.393 28.89 1491.03 1021.814 8.55 8.53 12.435 28.86 1491.14 1021.783 8.85 8.83 12.463 28.85 1491.23 1021.772 9.15 9.13 12.490 28.83 1491.31 1021.757 9.45 9.43 12.527 28.80 1491.40 1021.724 9.75 9.73 12.581 28.76 1491.54 1021.684 10.05 10.03 12.617 28.73 1491.64 1021.663 10.35 10.33 12.645 28.72 1491.72 1021.644 10.65 10.62 12.654 28.71 1491.75 1021.641 10.95 10.93 12.663 28.71 1491.78 1021.636 11.25 11.22 12.673 28.70 1491.81 1021.629 11.55 11.52 12.657 28.71 1491.77 1021.640 11.85 11.82 12.641 28.72 1491.74 1021.656 12.15 12.12 12.635 28.73 1491.73 1021.665 12.45 12.42 12.652 28.72 1491.78 1021.652 12.75 12.72 12.674 28.70 1491.84 1021.636 13.05 13.02 12.688 28.69 1491.88 1021.630 13.35 13.32 12.697 28.68 1491.90 1021.619 13.65 13.62 12.687 28.68 1491.88 1021.626 13.95 13.92 12.685 28.69 1491.88 1021.631 14.25 14.22 12.674 28.70 1491.87 1021.648 14.55 14.52 12.636 28.71 1491.76 1021.664 14.85 14.82 12.576 28.75 1491.59 1021.699 15.15 15.12 12.470 28.85 1491.36 1021.801 15.45 15.41 12.374 28.89 1491.08 1021.851 15.75 15.71 12.222 29.00 1490.70 1021.969 16.05 16.01 12.161 29.05 1490.55 1022.019 16.35 16.31 12.171 29.05 1490.58 1022.016 16.65 16.61 12.195 29.02 1490.64 1021.990 16.95 16.91 12.204 29.01 1490.66 1021.980 17.25 17.21 12.151 29.06 1490.54 1022.031 17.55 17.51 12.168 29.03 1490.57 1022.007 17.85 17.81 12.085 29.09 1490.36 1022.071 18.15 18.11 11.984 29.17 1490.11 1022.150 18.45 18.41 11.909 29.23 1489.92 1022.211 18.75 18.71 11.874 29.25 1489.84 1022.239