*2026/01/16 10:37:53.14 *IOS HEADER VERSION 2.0 2016/04/28 2016/06/13 IVF16 *FILE START TIME : UTC 2025/04/29 21:07:35.000 END TIME : UTC 2025/04/29 21:07:41.800 TIME INCREMENT : 0 0 0 0 200 ! (day hr min sec ms) TIME UNITS : Milliseconds NUMBER OF RECORDS : 35 DATA DESCRIPTION : CTD FILE TYPE : ASCII NUMBER OF CHANNELS : 8 $TABLE: CHANNELS ! No Name Units Minimum Maximum !--- ---------------------- --------------- -------------- -------------- 1 Pressure decibar 0.15 10.43 2 Depth metres 0.15 10.4 3 Temperature 'deg C (ITS90)' 10.544 10.763 4 Conductivity S/m 3.13717 3.22831 5 Conductance:Specific S/m 4.3871 4.54118 6 Salinity PSS-78 27.64 28.69 7 Speed:Sound m/s 1483.65 1484.31 8 Density kg/m^3 1021.097 1021.99 $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 : 2025-087 AGENCY : Pacific Biological Station COUNTRY : Canada PROJECT : PSSI SCIENTIST : Deeg C. PLATFORM : Other Vessel *LOCATION GEOGRAPHIC AREA : West Coast Vancouver Island EVENT NUMBER : 124 LATITUDE : 49 14.27420 N ! (deg min) LONGITUDE : 125 55.00820 W ! (deg min) *INSTRUMENT TYPE : CTD MODEL : Castaway SERIAL NUMBER : CC2009002 SOURCE FILE : CC2009002_20250429_210735 ! custom item *HISTORY $TABLE: PROGRAMS ! Name Vers Date Time Recs In Recs Out ! -------- ------ ---------- -------- --------- --------- SPRD2IS 5.3.1 2026/01/16 10:33:29 35 35 MERGEHDR 1.3 2026/01/16 10:35:43 35 35 HDREDIT2 3.2 2026/01/16 10:36:14 ? ? REMOVECH 8.2 2026/01/16 10:36:40 35 35 CALIB 12.1 2026/01/16 10:37:16 35 35 CLEAN 5.3 2026/01/16 10:37:53 35 35 $END $REMARKS -HEADER EDITS: 2026/01/16 10:36:14 Applied edit header: C:\Users\huntingtons\Desktop\Misc_Projects\Castaway\castaway2023_HDR.txt Channel 2: Depth [metres] Format: F10.6 ==> F7.2 Channel 3: Temperature [deg C (ITS90)] Format: F14.6 ==> F8.3 Channel 4: Conductivity [mS/cm] Units: ms/cm ==> mS/cm Format: F14.6 ==> F9.1 Channel 5: Conductance:Specific [mS/cm] Name: Specific Conductance ==> Conductance:Specific Units: ms/cm ==> mS/cm Format: F14.6 ==> F9.1 Channel 6: Salinity [PSS-78] Format: F14.6 ==> F7.2 Channel 7: Speed:Sound [m/s] Name: Sound Velocity ==> Speed:Sound Format: F14.6 ==> F8.2 Channel 8: Density [kg/m^3] Format: F14.6 ==> F9.3 -REMOVECH 2026/01/16 10:36:40 The following CHANNEL(S) were removed: Event_number -CALIB parameters: 2026/01/16 10:37:16 Calibration type = Correct Mode: ONLY - calibration specs from Cal File only. Calibration file = C:\Users\huntingtons\Desktop\Misc_Projects\Castaway\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 -CLEAN functions: 2026/01/16 10:37:42 20 Reset #RECS, MIN & MAX values in header. Set header Start and End times from the data. $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. Calibration dates were taken from the original data file header: % Samples per second,5 % Electronics calibration date,0001-01-01 % Conductivity calibration date,2020-03-13 % Temperature calibration date,2020-03-12 % Pressure calibration date,2020-03-04 % *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 10.748 3.14091 4.39312 27.68 1483.66 1021.126 0.45 0.45 10.761 3.13951 4.38953 27.66 1483.68 1021.107 0.75 0.75 10.759 3.13792 4.38754 27.64 1483.67 1021.097 1.05 1.05 10.754 3.13717 4.38710 27.64 1483.65 1021.097 1.35 1.35 10.751 3.14205 4.39436 27.69 1483.70 1021.138 1.65 1.65 10.742 3.14337 4.39732 27.71 1483.70 1021.156 1.95 1.95 10.760 3.14584 4.39860 27.72 1483.78 1021.162 2.25 2.25 10.763 3.14754 4.40052 27.73 1483.81 1021.174 2.55 2.55 10.743 3.15015 4.40661 27.77 1483.79 1021.210 2.85 2.85 10.724 3.15267 4.41254 27.81 1483.78 1021.245 3.15 3.14 10.709 3.15341 4.41542 27.83 1483.75 1021.263 3.45 3.44 10.702 3.15604 4.42003 27.86 1483.77 1021.290 3.75 3.74 10.691 3.15838 4.42457 27.89 1483.77 1021.317 4.05 4.04 10.681 3.16413 4.43388 27.96 1483.82 1021.369 4.35 4.34 10.674 3.17043 4.44362 28.02 1483.88 1021.424 4.65 4.64 10.667 3.17596 4.45219 28.08 1483.93 1021.472 4.95 4.94 10.658 3.18007 4.45914 28.13 1483.96 1021.512 5.25 5.24 10.647 3.18572 4.46841 28.19 1484.00 1021.564 5.55 5.54 10.638 3.18872 4.47371 28.23 1484.01 1021.595 5.85 5.84 10.627 3.19538 4.48453 28.30 1484.07 1021.656 6.15 6.14 10.616 3.20486 4.49922 28.41 1484.15 1021.738 6.45 6.44 10.605 3.21174 4.51018 28.48 1484.21 1021.800 6.75 6.74 10.592 3.21621 4.51820 28.54 1484.23 1021.846 7.05 7.04 10.580 3.21834 4.52266 28.56 1484.23 1021.872 7.35 7.34 10.572 3.22023 4.52633 28.59 1484.24 1021.894 7.65 7.63 10.566 3.22137 4.52872 28.61 1484.24 1021.909 7.95 7.93 10.560 3.22229 4.53082 28.62 1484.24 1021.922 8.25 8.23 10.555 3.22238 4.53156 28.62 1484.23 1021.927 8.55 8.53 10.551 3.22464 4.53522 28.65 1484.25 1021.949 8.85 8.83 10.548 3.22573 4.53718 28.66 1484.26 1021.961 9.15 9.13 10.548 3.22650 4.53820 28.67 1484.28 1021.968 9.45 9.43 10.548 3.22689 4.53884 28.67 1484.29 1021.973 9.75 9.73 10.547 3.22729 4.53944 28.68 1484.29 1021.977 10.05 10.03 10.544 3.22682 4.53913 28.68 1484.29 1021.977 10.43 10.40 10.545 3.22831 4.54118 28.69 1484.31 1021.990