*2019/08/26 15:28:33.39 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2015/12/11 19:54:29.000 END TIME : UTC 2015/12/11 19:54:36.400 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 38 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 11.11 2 Depth metres 0.15 11.08 3 Temperature 'deg C (ITS90)' 9.733 10.339 4 Conductivity S/m 3.06837 3.26707 5 Conductance:Specific S/m 4.41559 4.62252 6 Salinity PSS-78 27.73 29.23 7 Speed:Sound m/s 1480.07 1484.24 8 Density kg/m^3 1021.324 1022.452 $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 : 2015-98 AGENCY : Canadian Hydrographic Service COUNTRY : Canada PROJECT : CHS CTD Data Acquisition SCIENTIST : Dangerfield N. *LOCATION EVENT NUMBER : 71 LATITUDE : 48 39.25855 N ! (deg min) LONGITUDE : 123 27.19078 W ! (deg min) *INSTRUMENT TYPE : SonTek CTD MODEL : CastAway SERIAL NUMBER : CC1441005 *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! ------------- ------ ---------- -------- --------- --------- READ_CHS_CTDS 1.0 2017/12/08 17:21:29 38 38 HDREDIT2 3.1.1 2017/12/13 11:29:02 ? ? CALIB 12.0 2019/08/26 15:28:33 38 38 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 17:21:29 -HEADER EDITS: 2017/12/13 11:29:02 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 15:28:33 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,CC1441005 % File name,CC1441005_20151211_195429 % Cast time (UTC),2015-12-11 19:54:29 % Cast time (local),2015-12-11 19:54:29 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,48.6543091 % Start longitude,-123.4531797 % Start altitude,-13.399999618530273 % Start GPS horizontal error(Meter),2.2200000286102295 % Start GPS vertical error(Meter),2.869999885559082 % Start GPS number of satellites,7 % End latitude,48.6542771 % End longitude,-123.4531689 % End altitude,-16.520000457763672 % End GPS horizontal error(Meter),5.4899997711181641 % End GPS vertical error(Meter),7.6999998092651367 % End GPS number of satellites,7 % Cast duration (Seconds),72.8 % Samples per second,5 % Electronics calibration date,0001-01-01 % Conductivity calibration date,2015-01-26 % Temperature calibration date,2015-01-26 % Pressure calibration date,2015-01-26 % 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 9.733 3.07715 4.42975 27.83 1480.14 1021.401 0.45 0.45 9.745 3.06837 4.41559 27.73 1480.07 1021.324 0.75 0.75 9.794 3.08658 4.43552 27.88 1480.43 1021.430 1.05 1.05 9.835 3.10965 4.46346 28.07 1480.83 1021.580 1.35 1.35 9.849 3.11941 4.47563 28.16 1480.99 1021.646 1.65 1.65 9.855 3.11540 4.46902 28.11 1480.96 1021.612 1.95 1.95 9.849 3.11604 4.47080 28.12 1480.95 1021.623 2.25 2.25 9.869 3.12249 4.47741 28.17 1481.09 1021.659 2.55 2.54 9.901 3.12975 4.48380 28.22 1481.27 1021.692 2.85 2.84 9.923 3.13746 4.49195 28.28 1481.43 1021.736 3.15 3.14 9.938 3.14584 4.50198 28.35 1481.58 1021.791 3.45 3.44 9.964 3.15190 4.50730 28.39 1481.73 1021.819 3.75 3.74 9.982 3.15539 4.50997 28.41 1481.82 1021.834 4.05 4.04 9.992 3.15722 4.51137 28.42 1481.88 1021.842 4.35 4.34 10.000 3.15811 4.51157 28.43 1481.91 1021.844 4.65 4.64 10.007 3.15870 4.51147 28.43 1481.94 1021.844 4.95 4.94 10.013 3.16108 4.51415 28.44 1481.99 1021.860 5.25 5.24 10.022 3.16387 4.51694 28.46 1482.06 1021.875 5.55 5.54 10.035 3.16771 4.52072 28.49 1482.14 1021.896 5.85 5.84 10.047 3.17144 4.52461 28.52 1482.22 1021.918 6.15 6.14 10.052 3.17243 4.52535 28.53 1482.25 1021.923 6.45 6.43 10.057 3.17326 4.52582 28.53 1482.28 1021.926 6.75 6.74 10.058 3.17350 4.52601 28.53 1482.30 1021.928 7.05 7.03 10.059 3.17461 4.52755 28.54 1482.31 1021.938 7.35 7.33 10.059 3.17671 4.53049 28.56 1482.35 1021.955 7.65 7.63 10.064 3.17922 4.53346 28.58 1482.39 1021.972 7.95 7.93 10.076 3.18177 4.53547 28.60 1482.46 1021.984 8.25 8.23 10.085 3.18327 4.53655 28.61 1482.51 1021.990 8.55 8.53 10.095 3.18615 4.53929 28.63 1482.58 1022.006 8.85 8.83 10.108 3.19202 4.54605 28.68 1482.68 1022.043 9.15 9.13 10.129 3.20068 4.55558 28.75 1482.85 1022.094 9.45 9.43 10.151 3.20695 4.56174 28.79 1482.99 1022.127 9.75 9.73 10.180 3.21767 4.57318 28.87 1483.20 1022.189 10.05 10.03 10.197 3.22470 4.58098 28.93 1483.34 1022.231 10.35 10.32 10.228 3.24509 4.60590 29.11 1483.67 1022.366 10.65 10.62 10.292 3.25713 4.61448 29.17 1483.99 1022.409 10.95 10.92 10.333 3.26432 4.61929 29.21 1484.19 1022.434 11.11 11.08 10.339 3.26707 4.62252 29.23 1484.24 1022.452