LAST CHANGED : 2020/08/29 13:01:41 CRUISE NAME(S) : FK200802 CRUISE DATES : 2020/07/31 23:18:41 to 2020/08/29 13:02:24 SHIP NAME : Falkor PORTS : Cairns, AUS to Cairns, AUS CHIEF SCIENTIST : Brendan Brooke DATABASE NAME : a_fk DATA FILES : fk2020_212_83890.raw to fk2020_241_43200.raw STATUS : to do done ------ ----------- averaged [ X ] loaded [ X ] # loaded 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 : os75 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 2020/08/01 08:26:56 off 300 80 8 7 8 44.47 0.00 0001 2020/08/29 11:31:27 on 300 80 8 7 8 44.47 0.00 0001 HEADING : PRIMARY : heading from gyro CORRECTION : heading correction from seapath NOTE: time-dependent heading corrections applied IN the ensembles (see cal/rotate/ens_hcorr.ang) POSITIONS : gps positions from cnav CALIBRATION : os75 original rotation: 44.47 additional rotation -0.17 final transducer angle is: 44.64 (44.47) - (-0.17) applied scale factor 1.0 additional scale factor (none) final scale factor: 1.0 COMMENTS : Falkor ROV cruise off of Australia - lots of small groups of ADCP data. Falkor cruises have a small number of edited watertrack points due to procedures. In this case we use a nearby cruise with sufficient points as a measure of whether the calibration is good or not. In this case FK200308 is used, with the statistics: **watertrack** ------------ Number of edited points: 19 out of 27 amp = 0.9984 + 0.0002 (t - 84.2) phase = -0.06 + 0.0114 (t - 84.2) median mean std amplitude 0.9980 0.9984 0.0108 phase -0.0100 -0.0646 0.3323 ------------ On top of this we apply a phase adjustment based on bottom track data. PROCESSOR : Joseph Gum --- processing parameters ---------- ## (determined from "sonar"): model = os ## (determined from "sonar"): frequency = 75 ## (determined from "sonar"): instname = os75 ## (determined from "sonar"): pingtype = bb beamangle 30 cruisename FK200802 datatype uhdas ens_len 300 fixfile a_fk.gps frequency 75 hcorr_inst seapath instname os75 model os pingtype bb proc_engine python ref_method refsm refuv_smoothwin 3 refuv_source nav sonar os75bb txy_file a_fk.agt xducer_dx 1 xducer_dy 21 yearbase 2020 ========================================= PROCESSING STEPS: ========================================= # Processing starts in the os75bb directory. # 1. Check heading correction $ plot_nav.py nav/a_fk.gps $ figview.py No missing heading fixes. # 2. ADCP calibration $ catwt **watertrack** ------------ Number of edited points: 6 out of 8 amp = 0.9970 + 0.0014 (t - 223.8) phase = -0.17 + 0.0263 (t - 223.8) median mean std amplitude 0.9940 0.9970 0.0157 phase -0.3405 -0.1702 0.9081 ------------ $ catbt **bottomtrack** ------------ unedited: 18 points edited: 18 points, 2.0 min speed, 2.5 max dev median mean std amplitude 0.9983 0.9974 0.0049 phase -0.1778 -0.1024 0.3601 ------------ The bottom track phase data does not agree with the flanking cruise data and so we will apply a correction to the cruise based on the bottom track phase. $ catxy **transducer-gps offset** ------------ guessing ADCP (dx=starboard, dy=fwd) meters from GPS positions from a_fk.agt calculation done at 2020/08/29 13:01:41 xducer_dx = -15.584533 xducer_dy = 20.845699 signal = 948.457950 ------------ Signal is under 1000, most likely no adjustment needed. $ quick_adcp.py --steps2rerun rotate:apply_edit:navsteps:calib --rotate_angle -0.17 --auto $ catwt **watertrack** ------------ Number of edited points: 6 out of 8 amp = 0.9972 + 0.0014 (t - 223.8) phase = 0.02 + 0.0309 (t - 223.8) median mean std amplitude 0.9940 0.9972 0.0151 phase -0.1935 0.0200 0.9070 ------------ $ catbt **bottomtrack** ------------ unedited: 17 points edited: 15 points, 2.0 min speed, 2.5 max dev median mean std amplitude 0.9989 0.9978 0.0056 phase -0.0593 0.0436 0.3787 ------------ Better, although total number of points are still low. # 3. Editing points $ dataviewer.py -e Applied neighbor algorithm requiring at least *1* full neighbor to count. $ quick_adcp.py --steps2rerun navsteps:calib --auto $ catwt **watertrack** ------------ Number of edited points: 6 out of 8 amp = 0.9990 + 0.0013 (t - 223.8) phase = 0.12 + 0.0271 (t - 223.8) median mean std amplitude 0.9975 0.9990 0.0144 phase -0.1010 0.1152 0.7821 ------------ $ catbt **bottomtrack** ------------ unedited: 17 points edited: 15 points, 2.0 min speed, 2.5 max dev median mean std amplitude 0.9989 0.9978 0.0056 phase -0.0593 0.0436 0.3787 ------------ # 4. Re-check heading correction $ figview.py Seems fine. # 5. Check calibration Since we're using a calibration from a flanking cruise, there's not much to be done here. We compare against original data just in case. $ dataviewer.py -c . ../os75bb.orig No major changes. # 6. Make plots and files $ mkdir webpy $ cp ../wh300/webpy/sectinfo.txt webpy/. $ quick_web.py --redo $ figview.py webpy $ quick_adcp.py --steps2rerun matfiles --auto $ adcp_nc.py adcpdb contour/os75bb FK200802 os75bb --ship_name Falkor $ ncdump -h contour/os75bb.nc