*2019/08/26 15:30:14.71 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2016/11/03 18:31:00.000 END TIME : UTC 2016/11/03 18:31:04.200 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 22 DATA DESCRIPTION : CTD NUMBER OF CHANNELS : 6 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- -------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 6.3 2 Depth metres 0.15 6.29 3 Temperature 'deg C (ITS90)' 10.934 10.973 4 Conductivity S/m 3.18368 3.18874 5 Salinity PSS-78 27.93 28 6 Density kg/m^3 1021.294 1021.349 $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 ' ' 7 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 : 600 LATITUDE : 49 29.48859 N ! (deg min) LONGITUDE : 124 21.07749 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 2017/12/09 01:50:25 22 22 HDREDIT2 3.1.1 2017/12/13 11:31:17 ? ? CALIB 12.0 2019/08/26 15:30:14 22 22 $END $REMARKS -READ_CHS_CTDS processing: 2017/12/09 01:50:25 -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: Conductivity [mS/cm] Format: F10.3 ==> F9.1 Channel 5: Salinity [PSS-78] Format: F10.3 ==> F7.2 Channel 6: Density [kg/m^3] Format: F10.3 ==> F9.3 -CALIB parameters: 2019/08/26 15:30:14 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 $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_20161103_183100 % Cast time (UTC),2016-11-03 18:31:00 % Cast time (local),2016-11-03 11:31:00 % Sample type,Cast % Cast data,Processed % Location source,GPS % Default latitude,32 % Default altitude,0 % Start latitude,49.4914765 % Start longitude,-124.3512915 % Start altitude,-10.079999923706055 % Start GPS horizontal error(Meter),1.440000057220459 % Start GPS vertical error(Meter),2.1099998950958252 % Start GPS number of satellites,9 % End latitude, % End longitude, % End altitude, % End GPS horizontal error(Meter), % End GPS vertical error(Meter), % End GPS number of satellites, % Cast duration (Seconds),44.6 % 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) $END !--1--- --2--- ---3--- ----4---- --5--- ---6---- !Pressu Depth Tempera Conductiv Salini Density !re ture ity ty !------ ------ ------- --------- ------ -------- *END OF HEADER 0.15 0.15 10.939 3.18874 28.00 1021.344 0.45 0.45 10.936 3.18847 28.00 1021.345 0.75 0.75 10.934 3.18860 28.00 1021.349 1.05 1.05 10.936 3.18797 28.00 1021.344 1.35 1.35 10.942 3.18776 27.99 1021.339 1.65 1.65 10.952 3.18654 27.97 1021.324 1.95 1.95 10.961 3.18594 27.96 1021.313 2.25 2.25 10.961 3.18545 27.95 1021.311 2.55 2.54 10.962 3.18553 27.95 1021.312 2.85 2.84 10.973 3.18479 27.94 1021.300 3.15 3.14 10.971 3.18368 27.93 1021.294 3.45 3.44 10.956 3.18389 27.94 1021.308 3.75 3.74 10.946 3.18653 27.97 1021.336 4.05 4.04 10.947 3.18740 27.98 1021.344 4.35 4.34 10.951 3.18748 27.98 1021.343 4.65 4.64 10.950 3.18807 27.98 1021.349 4.95 4.94 10.952 3.18749 27.98 1021.344 5.25 5.24 10.953 3.18729 27.98 1021.344 5.55 5.54 10.953 3.18549 27.96 1021.332 5.85 5.84 10.953 3.18562 27.96 1021.334 6.15 6.14 10.955 3.18679 27.97 1021.343 6.30 6.29 10.954 3.18683 27.97 1021.344