*2017/12/13 11:31:17.95 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2016/07/18 22:07:26.000 END TIME : UTC 2016/07/18 22:07:39.400 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 68 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 6 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 20.367 2 Depth metres 0.15 20.314 3 Temperature 'deg C (ITS90)' 11.555 12.827 4 Salinity PSS-78 28.751 29.485 5 Speed:Sound m/s 1488.988 1492.434 6 Density kg/m^3 1021.661 1022.48 $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 : 607 LATITUDE : 48 46.11159 N ! (deg min) LONGITUDE : 123 33.71536 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 01:57:26 68 68 HDREDIT2 3.1.1 2017/12/13 11:31:17 ? ? $END $REMARKS -READ_CHS_CTDS processing: 2017/12/09 01:57:25 -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_220726 % Cast time (UTC),2016-07-18 22:07:26 % Cast time (local),2016-07-18 22:07:26 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,48.7685265 % Start longitude,-123.5619227 % Start altitude,-17.819999694824219 % Start GPS horizontal error(Meter),4.3400001525878906 % Start GPS vertical error(Meter),6.4000000953674316 % Start GPS number of satellites,5 % End latitude,48.7687031 % End longitude,-123.5614541 % End altitude,-19.819999694824219 % End GPS horizontal error(Meter),5.9499998092651367 % End GPS vertical error(Meter),8.9700002670288086 % End GPS number of satellites,5 % Cast duration (Seconds),106.8 % 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 12.827 28.94 1492.43 1021.734 0.45 0.45 12.763 28.94 1492.22 1021.749 0.75 0.75 12.695 28.94 1492.00 1021.765 1.05 1.05 12.510 29.00 1491.43 1021.843 1.35 1.35 12.382 28.99 1490.99 1021.861 1.65 1.65 12.434 28.86 1491.02 1021.751 1.95 1.95 12.505 28.77 1491.17 1021.676 2.25 2.25 12.499 28.75 1491.13 1021.661 2.55 2.54 12.426 28.89 1491.05 1021.786 2.85 2.84 12.388 28.92 1490.96 1021.816 3.15 3.14 12.367 28.94 1490.91 1021.832 3.45 3.44 12.350 28.94 1490.86 1021.842 3.75 3.74 12.337 28.98 1490.87 1021.877 4.05 4.04 12.323 29.00 1490.85 1021.896 4.35 4.34 12.312 29.06 1490.88 1021.941 4.65 4.64 12.355 29.05 1491.02 1021.926 4.95 4.94 12.381 29.03 1491.10 1021.912 5.25 5.24 12.391 29.02 1491.12 1021.902 5.55 5.54 12.390 29.02 1491.13 1021.908 5.85 5.84 12.391 29.04 1491.16 1021.921 6.15 6.13 12.418 29.02 1491.23 1021.901 6.45 6.43 12.429 29.01 1491.27 1021.893 6.75 6.73 12.436 29.00 1491.29 1021.890 7.05 7.03 12.435 29.02 1491.31 1021.906 7.35 7.33 12.430 29.01 1491.29 1021.901 7.65 7.63 12.422 29.00 1491.25 1021.893 7.95 7.93 12.431 28.98 1491.26 1021.875 8.25 8.23 12.428 28.98 1491.25 1021.875 8.55 8.53 12.427 28.96 1491.24 1021.866 8.85 8.83 12.429 28.95 1491.23 1021.860 9.15 9.13 12.363 29.00 1491.07 1021.908 9.45 9.43 12.294 29.03 1490.88 1021.949 9.75 9.73 12.254 29.07 1490.78 1021.985 10.05 10.03 12.186 29.12 1490.62 1022.043 10.35 10.32 12.045 29.21 1490.24 1022.136 10.65 10.62 11.984 29.17 1489.98 1022.116 10.95 10.92 11.975 29.17 1489.96 1022.122 11.25 11.22 11.970 29.18 1489.96 1022.129 11.55 11.52 11.961 29.19 1489.94 1022.139 11.85 11.82 11.956 29.19 1489.93 1022.142 12.15 12.12 11.952 29.19 1489.92 1022.145 12.45 12.42 11.945 29.19 1489.90 1022.149 12.75 12.72 11.934 29.20 1489.89 1022.161 13.05 13.02 11.928 29.21 1489.88 1022.170 13.35 13.32 11.938 29.22 1489.92 1022.174 13.65 13.62 11.957 29.20 1489.98 1022.162 13.95 13.92 11.969 29.19 1490.01 1022.149 14.25 14.21 11.998 29.16 1490.08 1022.123 14.55 14.51 12.001 29.16 1490.09 1022.120 14.85 14.81 11.993 29.16 1490.07 1022.124 15.15 15.11 11.974 29.17 1490.03 1022.140 15.45 15.41 11.962 29.18 1490.00 1022.152 15.75 15.71 11.950 29.19 1489.98 1022.164 16.05 16.01 11.935 29.20 1489.94 1022.175 16.35 16.31 11.928 29.22 1489.94 1022.190 16.65 16.61 11.921 29.22 1489.93 1022.197 16.95 16.91 11.909 29.23 1489.90 1022.203 17.25 17.21 11.882 29.25 1489.83 1022.223 17.55 17.51 11.813 29.29 1489.65 1022.275 17.85 17.80 11.706 29.36 1489.36 1022.348 18.15 18.10 11.667 29.39 1489.26 1022.376 18.45 18.40 11.631 29.41 1489.18 1022.406 18.75 18.70 11.587 29.44 1489.06 1022.433 19.05 19.00 11.556 29.47 1488.99 1022.463 19.35 19.30 11.555 29.47 1488.99 1022.468 19.65 19.60 11.561 29.47 1489.02 1022.465 19.95 19.90 11.556 29.47 1489.01 1022.471 20.37 20.31 11.563 29.48 1489.05 1022.480