*2019/08/26 15:30:28.57 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2017/02/28 01:34:31.000 END TIME : UTC 2017/02/28 01:34:43.800 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 65 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 19.4 2 Depth metres 0.15 19.36 3 Temperature 'deg C (ITS90)' 7.299 8.133 4 Conductivity S/m 2.68971 3.07193 5 Conductance:Specific S/m 4.16246 4.63618 6 Salinity PSS-78 25.7 29.05 7 Speed:Sound m/s 1468.28 1475.89 8 Density kg/m^3 1020.066 1022.665 $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 : 255 LATITUDE : 49 18.93830 N ! (deg min) LONGITUDE : 123 8.12519 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 20:10:34 65 65 HDREDIT2 3.1.1 2017/12/13 11:33:16 ? ? CALIB 12.0 2019/08/26 15:30:28 65 65 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/08 20:10:34 -HEADER EDITS: 2017/12/13 11:33:16 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 15:30:28 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_20170228_013431 % Cast time (UTC),2017-02-28 01:34:31 % Cast time (local),2017-02-28 01:34:31 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.3156383 % Start longitude,-123.1354198 % Start altitude,-13.390000343322754 % Start GPS horizontal error(Meter),1.440000057220459 % Start GPS vertical error(Meter),2.4100000858306885 % Start GPS number of satellites,8 % End latitude,49.3153985 % End longitude,-123.1349311 % End altitude,-26.590000152587891 % End GPS horizontal error(Meter),13.270000457763672 % End GPS vertical error(Meter),24.559999465942383 % End GPS number of satellites,6 % Cast duration (Seconds),96.4 % 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 7.300 2.69540 4.17251 25.76 1468.31 1020.117 0.45 0.45 7.299 2.69528 4.17233 25.76 1468.32 1020.118 0.75 0.75 7.309 2.68971 4.16246 25.70 1468.28 1020.066 1.05 1.05 7.320 2.69359 4.16709 25.73 1468.37 1020.092 1.35 1.35 7.335 2.70113 4.17683 25.80 1468.51 1020.145 1.65 1.65 7.337 2.70574 4.18365 25.84 1468.59 1020.183 1.95 1.95 7.333 2.70584 4.18434 25.85 1468.58 1020.188 2.25 2.25 7.329 2.70591 4.18491 25.85 1468.57 1020.192 2.55 2.55 7.338 2.71040 4.19080 25.89 1468.66 1020.225 2.85 2.85 7.363 2.71625 4.19647 25.93 1468.82 1020.256 3.15 3.15 7.381 2.72222 4.20340 25.98 1468.96 1020.294 3.45 3.45 7.390 2.73231 4.21782 26.08 1469.12 1020.372 3.75 3.75 7.410 2.73692 4.22228 26.11 1469.25 1020.397 4.05 4.05 7.453 2.74843 4.23455 26.20 1469.53 1020.463 4.35 4.35 7.493 2.75305 4.23643 26.22 1469.71 1020.473 4.65 4.65 7.539 2.75946 4.24022 26.25 1469.94 1020.494 4.95 4.95 7.640 2.78771 4.27042 26.47 1470.61 1020.655 5.25 5.25 7.713 2.87078 4.38785 27.29 1471.90 1021.284 5.55 5.54 7.739 2.88803 4.41069 27.45 1472.21 1021.408 5.85 5.84 7.771 2.90430 4.43124 27.59 1472.52 1021.519 6.15 6.14 7.796 2.93619 4.47652 27.91 1473.01 1021.764 6.45 6.44 7.858 2.99885 4.56338 28.51 1474.00 1022.233 6.75 6.74 7.940 3.03080 4.60043 28.78 1474.66 1022.433 7.05 7.04 8.010 3.03751 4.60089 28.79 1474.94 1022.435 7.35 7.34 8.035 3.04507 4.60888 28.85 1475.12 1022.479 7.65 7.64 8.061 3.04763 4.60909 28.86 1475.23 1022.480 7.95 7.94 8.076 3.04918 4.60931 28.86 1475.30 1022.482 8.25 8.24 8.083 3.04929 4.60855 28.86 1475.32 1022.479 8.55 8.54 8.083 3.04795 4.60655 28.84 1475.31 1022.470 8.85 8.84 8.085 3.05059 4.61020 28.87 1475.36 1022.491 9.15 9.13 8.096 3.05112 4.60946 28.86 1475.40 1022.488 9.45 9.43 8.102 3.05183 4.60978 28.87 1475.43 1022.491 9.75 9.73 8.099 3.05197 4.61043 28.87 1475.42 1022.496 10.05 10.03 8.101 3.05248 4.61080 28.87 1475.44 1022.499 10.35 10.33 8.105 3.05204 4.60959 28.86 1475.45 1022.493 10.65 10.63 8.108 3.05262 4.61012 28.87 1475.47 1022.498 10.95 10.93 8.113 3.05305 4.61012 28.87 1475.50 1022.499 11.25 11.23 8.119 3.05428 4.61112 28.88 1475.53 1022.505 11.55 11.53 8.121 3.06058 4.62032 28.94 1475.63 1022.556 11.85 11.83 8.121 3.06231 4.62297 28.96 1475.65 1022.572 12.15 12.12 8.122 3.06221 4.62262 28.96 1475.66 1022.571 12.45 12.42 8.125 3.06360 4.62434 28.97 1475.69 1022.582 12.75 12.72 8.127 3.06359 4.62395 28.97 1475.70 1022.581 13.05 13.02 8.126 3.06305 4.62331 28.96 1475.70 1022.579 13.35 13.32 8.125 3.06111 4.62057 28.94 1475.67 1022.565 13.65 13.62 8.124 3.06284 4.62337 28.96 1475.70 1022.582 13.95 13.92 8.124 3.06429 4.62550 28.98 1475.72 1022.595 14.25 14.22 8.123 3.06393 4.62506 28.97 1475.72 1022.593 14.55 14.52 8.124 3.06418 4.62536 28.98 1475.73 1022.596 14.85 14.82 8.125 3.06438 4.62553 28.98 1475.74 1022.599 15.15 15.12 8.123 3.06479 4.62635 28.98 1475.74 1022.604 15.45 15.41 8.124 3.06766 4.63063 29.01 1475.79 1022.629 15.75 15.71 8.128 3.06915 4.63228 29.02 1475.82 1022.639 16.05 16.01 8.127 3.06992 4.63350 29.03 1475.84 1022.647 16.35 16.31 8.128 3.07085 4.63486 29.04 1475.86 1022.655 16.65 16.61 8.130 3.07102 4.63480 29.04 1475.87 1022.656 16.95 16.91 8.130 3.07193 4.63618 29.05 1475.88 1022.665 17.25 17.21 8.133 3.07166 4.63535 29.04 1475.89 1022.662 17.55 17.51 8.127 3.07055 4.63453 29.04 1475.87 1022.659 17.85 17.81 8.122 3.06884 4.63261 29.02 1475.84 1022.650 18.15 18.11 8.120 3.06890 4.63300 29.02 1475.84 1022.653 18.45 18.41 8.112 3.06815 4.63298 29.02 1475.81 1022.655 18.75 18.70 8.112 3.06852 4.63350 29.03 1475.82 1022.659 19.05 19.00 8.114 3.06917 4.63430 29.03 1475.84 1022.664 19.40 19.36 8.116 3.06904 4.63384 29.03 1475.85 1022.663