log for ODM disdrometer deployment during PISTON 2018

Elizabeth J. Thompson
elizabeth.thompson@noaa.gov
NOAA Physical Sciences Laboratory: NOAA PSL

Kyla Drushka
kdrushka@apl.uw.edu
Applied Physics Laboratory at University of Washington: APL-UW

Disdrometer is owned and maintained by Kyla. 
The code used in this project was first developed by Kyla Drushka. 

Programs used:

read_odm_fix_DSD_et.m
ODM_save_PISTON.m
ODM_save_all_PISTON.m
ODM_save_PISTON.nc
PISTON_rain_compare.m
ODM_check_nc.m

9/10 4 UTC
	•	in port in Palau
	•	finished installation of ODM and switched out Christian’s unit
	•	noticed that drops keep getting logged when there isn’t actually any rain… Kyla processed data and noted that they don’t amount to any rain rate. 
	•	Unit was left on to measure rain associated with nearby super typhoon Mangkhut. In following days, the device measured really strong rain rates over 150 mm/h! and very large rain drops. 

9/14 22 UTC
	•	began transit from Palau to study area in Philippine Sea: 134.5 E, 11 N

9/18 5:16:54
	•	reset clock to one hour earlier, and downloaded data… which probably caused a 1 min time lag
	•	both time problems are addressed in ODM_save_PISTON.m

9/28 ?? 6 UTC
	•	stopped unit to download data… probably caused a 1 min offset, which is fixed later but the time needs to be double checked. 

9/29 19:16:11 UTC
	•	stopped unit to download data
	•	realized that you aren’t supposed to stop the unit to do this… and that time was slow by 2 min from the last 2-3 times that I stopped it to download data! so I reset the clock to 2 min faster, which is the real time

9/29 22:54 UTC
	•	finished QC and added data, readme, Klepp (2015), and plot to /Volumes/cruiseshare/noaa_flux_met/rain_gauge/disdrometer
	•	Jim Moum thought the disdrometer was being oriented by the vane in the opposite direction as the ship’s wind vane… but then the two vanes looked correct and consistent 10 min later.