LAST CHANGED : 2023/12/22 CRUISE NAME(S) : FKt230602 CRUISE DATES : 2023/06/02 to 2023/06/21 SHIP NAME : Falkor (too) PORTS : Puntarenas, Costa Rica to Puntarenas, Costa Rica CHIEF SCIENTIST : Beth Orcutt DATABASE NAME : a_ftoo DATA FILES : ftoo2023_152_09270.raw to ftoo2023_171_43200.raw STATUS : to do done ------ ----------- averaged [ X ] at sea loaded [ X ] at sea NOTE: heading correction instrument exists NOTE: time-dependent heading corrections applied IN the ensembles (see cal/rotate/ens_hcorr.ang) check heading correction [ X ] calibration [ X ] edited [ X ] re-check heading correction [ X ] check editing [ X ] figures [ X ] INSTRUMENT : os38 ACQUISITION : PROGRAM : uhdas PROCESSING : python LOGGING : PARAMETERS : BT : bottom track mode (on or off) SI : sampling interval or averaging period for ensemble (sec) NB : number of bins BL : bin length (m) TD : transducer depth (m) BK : blanking length (m) HO : heading offset applied by DAS (deg) HB : heading bias (deg) CRPH : compensation for roll-pitch-heading, 1:on, 0:off) yy/mm/dd hh:mm:ss BT SI NB BL TD BK HO HB CRPH 2023/06/02 02:39:31 off 300 100 12 7 16 0.91 0.00 0001 2023/06/13 12:38:23 off 300 100 12 7 16 0.91 0.00 0001 2023/06/14 14:43:29 off 300 100 12 7 16 0.91 0.00 0001 HEADING : PRIMARY : heading from gyro1 CORRECTION : heading correction from seapath NOTE: time-dependent heading corrections applied IN the ensembles (see cal/rotate/ens_hcorr.ang) POSITIONS : gps positions from posmv_gps CALIBRATION : (check original processing parameters) (1) transducer alignment original transducer alignment: 0.91 additional rotation 0.7 final transducer angle is: 0.21 = 0.91 - 0.7 (2) scale factor original scale factor 1 additional scale factor (none) (3) ADCP (dx=starboard, dy=fwd) meters from GPS original: 0 0 correction 0 -10 final offset 0 -10 COMMENTS : I performed a dxdy calibration. A good estimate of heading correction and transducer offset is available from adjacent cruises. Data below the bottom was removed, as well as small bits of data at the the bottom of the sonars range. A strong scattering layer was present and data was removed at the editors discretion. Editing and updating the dxdy correction improved the data during heading changes. PROCESSOR : Jamie Ash --- final processing parameters from dbinfo.txt ---------- #-------------------- ## (determined from "sonar"): model = os ## (determined from "sonar"): frequency = 38 ## (determined from "sonar"): instname = os38 ## (determined from "sonar"): pingtype = bb beamangle 30 cruisename FKt230602 datatype uhdas dbname a_ftoo ens_len 300 fixfile a_ftoo.gps frequency 38 hcorr_inst seapath instname os38 model os pingtype bb proc_engine python ref_method refsm refuv_smoothwin 3 refuv_source nav sonar os38bb txy_file a_ftoo.agt xducer_dx 0 xducer_dy -10 yearbase 2023 ================================================== POST PROCESSING STEPS: ================================================== ------------------------------------------------------------------------ ### 1. Check visual oddities ------------------------------------------------------------------------ # I ran this to look for gaps in the cruise track. plot_nav.py nav/a*.gps # I ran this to look for gaps in the heading correction. figview.py # I ran this looking for missing heading correction values. dataviewer.py # I ran this to check watertrack calibration. # Same as other sonars on this ship, the ship speed goes on the fritz # and there is a substantial gap in the reference layer velocity. ------------------------------------------------------------------------ ### 2. ADCP calibration ------------------------------------------------------------------------ # I ran this to adjust the calibration. quick_adcp.py --steps2rerun rotate:apply_edit:navsteps:calib --xducer_dy -10 --auto quick_adcp.py --steps2rerun rotate:apply_edit:navsteps:calib --rotate_angle 0.7 --auto # I ran this look at the watertrack calibration again. catwt.py catxy.py **watertrack** ----------- Number of edited points: 47 out of 49 median mean std amplitude 1.0060 1.0059 0.0073 phase 0.1110 0.0550 0.4028 ----------- ------------------------------------------------------------------------ ### 3. Editing points ------------------------------------------------------------------------ # I ran this go through the dataset and edit out bad values. dataviewer.py -e # I ran this to recompute the calibration residuals. quick_adcp.py --steps2rerun navsteps:calib --auto # Final calibration coefficients. catwt.py catxy.py **watertrack** ----------- Number of edited points: 47 out of 49 median mean std amplitude 1.0060 1.0059 0.0073 phase 0.8020 0.7532 0.4026 ----------- **transducer-gps offset** ----------- guessing ADCP (dx=starboard, dy=fwd) meters from GPS positions from a_ftoo.agt calculation done at 2023/11/02 02:27:55 xducer_dx = -0.537857 xducer_dy = 0.689398 signal = 1359.758072 ----------- # There was a strong scattering layer throughout this data set. # Some data below the scattering layer was removed. ------------------------------------------------------------------------ ### 4. Check edited, calibrated dataset against original dataset ------------------------------------------------------------------------ # Has this corrected the problems in the original? dataviewer.py -c . ../os38bb.orig # To compare this sonar with another sonar. dataviewer.py -c ../os38nb.cal . # The rotation helped. There is a vertical stripe at the beginning of the # data set that I decided to leave in as it appears in both the narrow # band and the broad band. Furthermore it is not associated with a # heading or speed change. ------------------------------------------------------------------------ ### 5. Make plots and files ------------------------------------------------------------------------ # To carry over the section info from another sonar. mkdir webpy cp ../os38nb.cal/webpy/sectinfo.txt webpy/ quick_web.py --redo # I ran this to extract matlab files. quick_adcp.py --steps2rerun matfiles --auto # I ran this to extract a netCDF file. adcp_nc.py adcpdb contour/os38bb FKt230602 os38bb --ship_name "Falkor too" # I ran this to look at the headers. ncdump -h contour/os38bb.nc | egrep '(cruise_id|sonar|yearbase)' # complete