LAST CHANGED : 2021/05/17 20:34:11 CRUISE NAME(S) : FK210501 CRUISE DATES : 2021/05/06 17:13:29 to 2021/05/17 20:33:25 SHIP NAME : Falkor PORTS : Darwin, AUS to Honolulu, USA CHIEF SCIENTIST : John Fulmer DATABASE NAME : a_fk DATA FILES : fk2021_123_84723.raw to fk2021_136_72000.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 2021/05/06 17:13:29 off 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 : os75nb original alignment: 44.47 additional rotation: -0.13 final transducer angle is: 44.60 (44.47) - (-0.13) original scalefactor: 1.0 additional scale factor (none) final scale factor: 1.0 COMMENTS : This is a transit cruise from Australia to Hawaii. We use the flanking data from FK210605 bottomtrack for calibration: **bottomtrack** ------------ unedited: 23 points edited: 22 points, 2.0 min speed, 2.5 max dev median mean std amplitude 0.9999 0.9996 0.0028 phase -0.1284 -0.0934 0.2022 ------------ 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 FK210501 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 2021 ================================================== PROCESSING STEPS: ================================================== # Processing commands start in the os75nb directory. ----------------------------- # 1. Check heading correction ----------------------------- Check that we have a good heading correction for all of the ADCP data. There should be no holes in the heading correction graphs, where good fixes are green circles and no fixes are red crosses. Gaps in the plots where there are no symbols are okay, no data was collected there. If there are red crosses on the heading correction graphs (cal/rotate/ens_hcorr_*.png) then they need to be patched in the cal/rotate dir using patch_hcorr.py. $ plot_nav.py nav/a_fk.gps $ figview.py No holes in the heading correction. --------------------- # 2. ADCP calibration --------------------- Calibrate the dataset in sum by checking the calibration values and applying a fix to the necessary categories if necessary. When looking at a water track or bottom track calibration, we want to see statistics inside the following values: median_tolerance amplitude 1.003 # 0.3% phase/angle 0.05 When looking at an xy calibration to adjust the relative location of the sonar to the currently known location we hope that the dx and dy values are as close to 0 as possible, and the signal is between 1000 and 5000. Less than 1000 means very little data, more than 5000 means too much change. If values are out of range we make a bulk correction to the entire dataset which should reduce the number of outliers to be edited out. If we make any changes to x or y they should be integers. $ catwt **watertrack** ------------ tail: cannot open 'cal/watertrk/adcpcal.out' for reading: No such file or directory ------------ $ catbt **bottomtrack** ------------ tail: cannot open 'cal/botmtrk/btcaluv.out' for reading: No such file or directory ------------ $ catxy **transducer-gps offset** ------------ guessing ADCP (dx=starboard, dy=fwd) meters from GPS positions from a_fk.agt calculation done at 2021/05/17 20:34:10 xducer_dx = 17.970709 xducer_dy = 45.393759 signal = 7.399488 ------------ Because of the lack of points, we are using the data from FK210605 for calibration. We'll apply the phase calibration of -0.13 based on the bottomtrack calibration. $ quick_adcp.py --steps2rerun rotate:apply_edit:navsteps:calib --rotate_angle -0.13 --auto $ catwt **watertrack** ------------ tail: cannot open 'cal/watertrk/adcpcal.out' for reading: No such file or directory ------------ No calibration points to look at post calibration. ------------------- # 3. Editing points ------------------- Edit out biased data or artifacts deeper than the range of the sonar in the dataset, or other problems. Use `dataviewer.py -e` to look for problems with the data and flag the bad data as bad. After editing out data we rerun the calibration to see if the changed dataset statistics have changed enough that a new calibration is needed. $ dataviewer.py -e Removed large spans of data when "bugs" migrated, leaving large holes in the middle of the dataset. Look at os75nb for data in that range. $ quick_adcp.py --steps2rerun navsteps:calib --auto $ catwt **watertrack** ------------ tail: cannot open 'cal/watertrk/adcpcal.out' for reading: No such file or directory ------------ $ catxy **transducer-gps offset** ------------ guessing ADCP (dx=starboard, dy=fwd) meters from GPS positions from a_fk.agt calculation done at 2021/07/20 00:31:42 xducer_dx = 5.563253 xducer_dy = 21.930294 signal = 7.399488 ------------ -------------------------------------------------- # 4. Re-check heading correction and other figures -------------------------------------------------- Check all figures again to make sure that any problems were addressed and no new problems have appeared after making changes to the dataset. $ figview.py All of the figures look fine. -------------------------------------------------------------- # 5. Check edited, calibrated dataset against original dataset -------------------------------------------------------------- Compare the edited, calibrated (or lack thereof) dataset against the original dataset to make sure all problems have been dealt with and no new problems have appeared. $ dataviewer.py -c . ../os75bb.orig $ dataviewer.py -c . ../os75nb.orig Removed areas in os75bb are covered in os75nb data. ------------------------- # 6. Make plots and files ------------------------- Create the figures and data files needed to finish processing and make public/submit to a repository (JASADCP, if nowhere else). Make the plots needed for web viewing, matlab files (legacy), and netCDF files, then check that the netCDF files are readable. Plots should be in 3 to 5 day chunks for a cruise longer than one week, or divided by geographic features where it makes sense. $ mkdir webpy $ cp ../os75nb/webpy/sectinfo.txt webpy/. $ quick_web.py --redo $ figview.py webpy $ quick_adcp.py --steps2rerun matfiles --auto $ adcp_nc.py adcpdb contour/os75bb FK210501 os75bb --ship_name Falkor $ ncdump contour/os75bb.nc -h