All Notes (32)
SB CTD 9136p
OXY4 SN 279 (Rutger's re-cal 11/2015)
OXY4 4831 SN 279
Take a look at DBD pump from end of mission, at +-260 there might have been a hint of sliding.
The bear is in the igloo.
Recovered by Williams/Noyes/Enright on R/V Sea Dance.
Some goosenecks barnacles and surface slime, but otherwise relatively clean!
Going for recovery today. Strong currents to SW -- going back to 900 m dives, single yos for another segment.
Weather not looking great for pickup until later next week.
Set goto to ping-pong at Hydrostation (water depth > 3000 m) for a few days
Turning science sensors off (in sample##.ma files)
Increasing pump throw to full to speed up a bit. Aiming for recovery on Saturday a.m. near shore
50+ kt gusts forecast for next 24-30 hours. Went to storm mode: CTRL-R wait 1 (gets gps, issues ctrl-w, and resumes)
double yos to 950, 8 hour no comms
Added m_battery_inst to SBDlist.dat
Changed u_dbd_sensor_list_xmit_control to 2
18 Apr: 2nd MOCNESS tow canceled by rough weather. Anna turned back toward station keeping site, 950 m dives, double yos. Wrong waypts file sent to glider (12km BATS box) and went unnoticed for a day.
20 Apr: corrected goto file
Dive / climb speeds equal ~16.5 cm/s
Pump throw -190 / + 230
Another AE/MOCNESS tow tonight. Anna sent NW to intersect anticipated ship track and heading during net tow.
Transect ~10 km WNW out and back completed. Back to station keeping, double yos, sci sensors sampling dives only.
Coordinating with Atlantic Explorer to follow in wake of ship during MOCNESS tow. single yos, shallower dives until a course / speed / time are determined.
26 * 30 = 780
780 * [.97 (shelf life) + .95 (end of life) + .95 (early drop off)] = 682 AH
All science sensors sampling full time dives and climbs. Boosted pump throw to 230 / -190
Changed yo20.ma to add buoyancy to climbs. File triggered a transfer problem (endless loop). Anna at surface for 40+ mins before I noticed.
Used zcancel to escape -> glider hung up iridium.
Removed 12 cc from pump throw on dives to equalize dn/up speeds
2nd underwater reset
2/16: Changed waypoints to 0.5 km box (evaluate station keeping ability)
2/20: Changed all sci sensor duty cycles to sample every dive (instead of alternate yos)
GliderDos A 6 >put u_science_low_power 0
498.19 1 sensor: u_science_low_power = 0 sec
GliderDos A 6 >put u_alt_min_depth 1100
508.03 5 sensor: u_alt_min_depth = 1100 m
GliderDos A 6 >put u_reqd_depth_at_surface 4.5
527.14 11 sensor: u_reqd_depth_at_surface = 4.5 m
GliderDos A 6 >put u_low_power_cycle_time 30
531.96 13 sensor: u_low_power_cycle_time = 30 sec
GliderDos A 6 >put x_fin_deadband .04
557.57 20 sensor: x_fin_deadband = 0.04 rad
reset underwater -> sequencing initial.mi
sequenced 1k_n2.mi again
Completing the trifecta saved additional 14%
u_science_low_power_mode 0 (enabled)
Low power mode effectively running 50% of the time (upcasts) with science low power disabled.
This saved about 4-5% power.
Dives not in low power due to altimeter. 7.16 appears to suffer from u_alt_min_depth needing to be set, -1 in yo file does not enable LP mode.
Software Version 7.16
Changed u_reqd_depth_at_surface to 4.5 m (pressure sensors look good)
Changed to low power mode, 30 sec.
Reduced pump throw to +200 / -190 to save power and equalize dive/climb speeds
Changed sci sensors to sample every other yo
Reduced size of tbdlist
(since deployment) x_fin_deadband doubled to .04 to prevent surface OOD fin overuse
Set to 950 m dives, double yos, 8 hours for no_comms
Deployed by Ruth Curry & Bruce Williams aboard RV Stommel.