Stack report – dune2_1

(1) Processing history

Property	Value
Step 1 stack	22 instruments onto 3600s grid

#	Time	Event
1		fast instruments (dt<=3600s) subsampled (nearest-neighbour in time), slow instruments interpolated (linear in time)

source: oceanarray/reports/_html_helpers.py:_history_tables

(2) Instruments (deep-first)

HAB = height above bottom (m).

#	Type	Serial	HAB (m)	~Depth (m)
0	rbrsolo	240231	8	737
1	microcat	26269	25	720
2	aquadopp	14321	26	719
3	rbrsolo	240230	75	670
4	microcat	5367	125	620
5	aquadopp	14284	126	619
6	rbrsolo	240234	175	570
7	microcat	2942	225	520
8	aquadopp	9920	226	519
9	rbrsolo	240236	275	470
10	microcat	3026	325	420
11	aquadopp	400125	326	419
12	rbrsolo	240235	375	370
13	microcat	2941	425	320
14	aquadopp	400118	426	319
15	rbrsolo	240233	475	270
16	microcat	7507	525	220
17	aquadopp	400123	526	219
18	rbrsolo	240232	575	170
19	microcat	25586	625	120
20	aquadopp	400115	626	119
21	rbrsolo	240250	675	70

(3) Hydrography

Pressure, temperature and salinity for the full deployment — one row each on a shared time axis. One colour per instrument (shared across rows, ordered by height) so a line can be followed through all three panels; the single legend spans the union of instruments. Values with QC flag ≥ 3 (suspect/bad) masked to NaN; ADCP excluded from pressure.

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(4) Velocity

Eastward (U), northward (V) and upward (W) velocity in the ENU frame — one row each on a shared time axis, one colour per instrument (shared across rows, ordered by height) with a single legend over the union of instruments. Values with velocity_flag ≥ 3 masked to NaN; instruments without velocity data omitted.

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(5) Particle trajectories

Pseudo-Lagrangian particle trajectories integrated from each Aquadopp's east/north velocity. Start at the origin; coloured by time through the deployment.

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source: oceanarray/plotters/current.py:plot_multi_aquadopp_trajectories

(6) Aquadopp speed profile

Aquadopp current-speed profile: median and interquartile range of speed against height above bottom across the deployment.

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source: oceanarray/plotters/current.py:plot_aquadopp_speed_profile

(7) T-S diagram

Left: scatter coloured by pressure. Middle: 2-D count heatmap. Right (when oxygen data present): scatter coloured by O₂ saturation (%). Bad (flag 4) and missing (flag 9) excluded; interpolated pressure (flag 8) retained.

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source: oceanarray/plotters/ts.py:draw_stack_ts_diagram

(8) Current rose diagrams

Magnetic declination applied: -13.97°

Direction the current flows toward (oceanographic convention, 0°=N). Speed coloured light→dark blue (slow→fast). QC-flagged samples excluded. Title shows serial number and height above bottom (m).

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source: oceanarray/reports/_plots.py:_make_rose_grid_b64

(9) Aquadopp tilt (|pitch| / |roll| / pressure estimate)

|pitch| / |roll| / pressure-estimate tilt per Aquadopp, sharing a y-axis. Horizontal lines mark the suspect and fail thresholds from the file attributes.

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source: oceanarray/reports/_stack.py:_make_aquadopp_tilt_panels

(10) Adjacent instrument spacing

Distribution of pressure differences between adjacent instrument pairs (pairs < 2 dbar apart excluded as co-located).

show / hide

source: oceanarray/reports/_stack.py:generate_stack_page

(11) Clock alignment check

One temperature trace per instrument, zoomed to the first and last 30 min of the deployment, to check clock alignment across instruments.

show / hide

source: oceanarray/plotters/diagnostic.py:plot_clock_offset_check

(A) NetCDF variables

Coordinates

Variable Dims Type Length Units Standard / long name Min / Max Attributes

hab N_LEVELS float64 22 m height above bottom 8 / 675 —

instrument_type N_LEVELS string 22 — instrument type — —

serial N_LEVELS string 22 — instrument serial number — —

time

datetime

328

—

time
time

2026-07-11 20:30:00 / 2026-07-25 11:30:00

1 attr

axis	T

source: oceanarray/reports/_vendored/nc_tables.py:coords_rows

Variables on N_LEVELS (22 samples)

Variable	Type	Units	Standard / long name	Min / Max	Valid	Valid %
InstrDepth	`float32`	—	—	70 / 737	22	100.0
clock_drift_seconds	`float32`	s	total linear clock drift applied	-57 / 601	19	86.4
magnetic_declination	`float32`	degrees_east	Magnetic declination (IGRF)	-13.97 / -13.97	7	31.8
serial_number	`string`	—	—	—	22	100.0
tilt_pressure_ref_hab	`float32`	m	Height above bottom of the pressure reference instrument used for tilt	25 / 675	21	95.5
tilt_pressure_ref_serial	`string`	—	Serial number of the pressure reference instrument used for tilt	—	22	100.0

Variables on time × N_LEVELS (328 × 22 = 7,216 samples)

Variable Type Units Standard / long name Min / Max Valid Valid % Attributes

conductivity

float32

mS cm-1

sea_water_electrical_conductivity
Conductivity

29.22 / 36.32

2,296

31.8

6 attrs

cnv_original_name	cond0mS/cm
cnv_original_label	Conductivity [mS/cm]
cnv_original_unit	mS/cm
original_name	cond0mS/cm
coverage_content_type	physicalMeasurement
measurement_type	Measured

current_direction float32 degrees direction_of_sea_water_velocity
Current direction (0=N, clockwise) 0.01348 / 359.9 2,296 31.8 —

current_speed float32 m s-1 sea_water_speed
Horizontal current speed 0.01103 / 1.331 2,296 31.8 —

east_velocity (_qc) float32 m s-1 eastward_sea_water_velocity
Eastward sea water velocity -1.33 / 0.9936 2,296 31.8 —

heading

float32

degrees

platform_heading_angle
Heading angle

0.2 / 359.6

2,296

31.8

1 attr

original_name	Heading

north_velocity (_qc) float32 m s-1 northward_sea_water_velocity
Northward sea water velocity -1.039 / 0.8338 2,296 31.8 —

pitch

float32

degrees

platform_pitch_angle
Pitch angle

-166.1 / 18.6

2,296

31.8

1 attr

original_name	Pitch

pressure (_qc)

float32

dbar

sea_water_pressure
sea water pressure

82.47 / 807.9

6,671

92.4

2 attrs

pressure_source	extrapolated from microcat 26269 (hab=25.0m, static offset=+17.0 dbar) — WARNING: out of range
comment	interpolated from neighbouring instrument(s)

roll

float32

degrees

platform_roll_angle
Roll angle

-27.9 / 165.9

2,296

31.8

1 attr

original_name	Roll

salinity (_qc)

float32

sea_water_practical_salinity
Practical Salinity

34.56 / 35.57

2,214

30.7

2 attrs

coverage_content_type	physicalMeasurement
comment	Derived from conductivity, temperature, pressure via gsw.SP_from_C

sigma0

float32

kg m-3

sea_water_sigma_t
Potential density anomaly referenced to surface (sigma-0)

27.42 / 28.06

2,214

30.7

1 attr

reference_pressure_dbar	0

temperature (_qc)

float32

degree_Celsius

sea_water_temperature
Temperature

-0.0704 / 8.17

7,216

100.0

13 attrs

rsk_channel_id	1
rsk_long_name	temperature
rsk_short_name	temp18
rsk_label	temperature_00
rsk_dbName	Temperature
rsk_units	°C
rsk_units_plain_text	Degrees_C
rsk_fe_module_type	SOLO-tmpB
rsk_fe_module_version	1.065
rsk_is_measured	1
rsk_is_derived	0
coverage_content_type	physicalMeasurement
measurement_type	Measured

tilt_from_pressure

float32

degrees

Tilt estimated from pressure difference

0 / 75.32

5,725

79.3

1 attr

comment	arccos(ΔP / rope_length) where ΔP = pressure[i] - pressure[ref] and rope_length = hab[ref] - hab[i] from mooring YAML; r

up_velocity (_qc) float32 m s-1 upward_sea_water_velocity
Upward sea water velocity -1.367 / 0.8008 2,296 31.8 —

velocity_flag

int8

—

Combined velocity QC flag (worst of east/north/up)

1 / 9

7,216

100.0

4 attrs

comment	Worst OceanSITES flag across east/north/up_velocity; apply to the velocity components before use.
flag_values	[0 1 2 3 4 7 8 9]
flag_meanings	unknown good_data probably_good_data potentially_correctable_bad_data bad_data nominal_value interpolated_value missing_
conventions	OceanSITES reference table 2

source: oceanarray/reports/_vendored/nc_tables.py:variables_rows

Scalar variables

Variable	Type	Units	Value
clock_offset	`float32`	s	0
end_time	`string`	—	2026-07-25T11:44
start_time	`string`	—	2026-07-11T20:30

source: oceanarray/reports/_vendored/nc_tables.py:scalars_rows

(B) NetCDF attributes

Identity & discovery

Attribute	Type	Value
mooring_name	`string`	dune2_1_2026

Spatiotemporal coverage

Attribute	Type	Value
waterdepth	`string`	745
latitude	`string`	65 43.913
longitude	`string`	-27 48.000
deployment_time	`string`	2026-07-11T20:30:00.000000000
recovery_time	`string`	2026-07-25T11:44:00.000000000

Provenance & processing

Attribute	Type	Value
dt_seconds	`int64`	3600
Conventions	`string`	CF-1.13

source: oceanarray/reports/_vendored/nc_tables.py:globals_rows

Not applicable to this deployment: Turbidity, Analog channels.

dune2_1_2026Stacked

(1) Processing history

(2) Instruments (deep-first)

(3) Hydrography

(4) Velocity

(5) Particle trajectories

(6) Aquadopp speed profile

(7) T-S diagram

(8) Current rose diagrams

(9) Aquadopp tilt (|pitch| / |roll| / pressure estimate)

(10) Adjacent instrument spacing

(11) Clock alignment check

(A) NetCDF variables

Coordinates

Variables on N_LEVELS (22 samples)

Variables on time × N_LEVELS (328 × 22 = 7,216 samples)

Scalar variables

(B) NetCDF attributes

Identity & discovery

Spatiotemporal coverage

Provenance & processing