ADCP_s

12m Node ADCP summary data

1200 kHz Workhorse Monitor measuring 25 bins, 50 cm apart, from 3.21 meters above bottom through the surface.

The velocities are used to produce current, depth and wave parameters.

Here is the list of field names:

Field name Description Units

Year The year the data were collected n/a

Yday Decimal year day (start time of sampling) UTC, January 1 at 00:00 is 1.0

MO The month the data was collected UTC

DA The day the data were collected UTC

HH The hour the data were collected UTC

MM The minute the data were collected UTC

SS The second the data were collected UTC

lrec_adcp Total number of records collected during averaging period n/a

yday_adcp Year day from ADCP (drifts) 0.5 = Jan 1 GMT

press_adcp_mean mean pressure above 2.1 mab cm

temp_adcp_mean mean water temperature at 2.1 mab Deg C

press_adcp_m50 median pressure above 2.1 mab cm

temp_adcp_m50 median water temperature at 2.1 mab Deg C

press_adcp_std std dev of detrended pressure cm

temp_adcp_std std dev of detrended water temperature Deg C

press_adcp_length number of records passing filter (9m < p < 12m) with outliers removed n/a

temp_adcp_length number of records passing filter (-25 < t < 35) with outliers removed n/a

nshort_adcp from unpacker - nbadChksum n/a

nmissing_adcp from unpacker - nbadSizeRecs n/a

pbad1 beam1: percent bad in removing outliers (3.5*std from mean) n/a

pbad2 beam2: percent bad in removing outliers (") n/a

pbad3 beam3: percent bad in removing outliers (") n/a

pbad4 beam4: percent bad in removing outliers (") n/a

wave_height_pressure 4*sqrt(sum(Snn).*dF) (f > 0.05) Snn from pressure cm

wave_period_pressure sum(Snn)./sum(Snn.*f) seconds

wave_height_all 4*sqrt(sum(Snn).*dF) (f > 0.05) Snn from surface velocity cm

wave_height_swell 4*sqrt(sum(Snn).*dF) (0.05 < f < 0.15 Hz, 20 -> 6.7 Seconds)
Snn from surface cm

wave_height_windwave 4*sqrt(sum(Snn).*dF) (f > 0.15, > 6.7 seconds) Snn from surface cm

wave_period_all sum(Snn)./sum(Snn.*f) from surface velocity (f > 0.05) seconds

wave_period_swell sum(Snn)./sum(Snn.*f) from surface velocity (0.05 < f < 0.15Hz)) seconds

wave_period_windwave sum(Snn)./sum(Snn.*f) from surface velocity (0.15 < f < 0.25) seconds

wave_direction_all wve direction from bottom PUV (f > 0.05) degrees from Ntrue

wave_direction_swell wave direction from bottom PUV (0.05 < f < 0.15Hz)) degrees from Ntrue

wave_direction_windwave wave direction from bottom PUV (0.15 < f < 0.25) degrees from Ntrue

Urms_bottom bottom orbital velocity cm/s
pitch pitch degrees

roll roll degrees

heading heading* degrees

z0 height above bottom at first bin cm

dz distance between bins cm

vel_1_East_mean Eastward component of velocity at bin 1 cm/s

vel_1_North_mean Northward component of velocity at bin 1 cm/s

sigstren_1_mean mean signal strength at bin 1 dB

sigstren_1_std std dev of detrended signal strength at bin 1 dB

sigcor_1_mean mean correlation coef (cc*100/255) n/a

vel_2_East_mean

vel_2_North_mean

sigstren_2_mean

sigstren_2_std

sigcor_2_mean

Parameters vel_N_East, vel_N_North, sigstren_N, and sigcor_N repeat through N=25.

Snn_1 estimate of surface spectra (Snn) for each freq bin** cm^2/s^2
Snn_2 Snn estimated from bin 2
Continuing through each frequency bin to Snn_30

Directn_1 Estimate of direction for each frequency bin degrees from Ntrue

Continuing through each frequency bin, N=30

* hard-coded heading in translation to geographic coordinates, ie, recorded heading is not used in processing
** f(1) = 0.03125, df = 1/64, f(30)=0.4844

Field name	Description	Units
Year	The year the data were collected	n/a
Yday	Decimal year day (start time of sampling)	UTC, January 1 at 00:00 is 1.0
MO	The month the data was collected	UTC
DA	The day the data were collected	UTC
HH	The hour the data were collected	UTC
MM	The minute the data were collected	UTC
SS	The second the data were collected	UTC
lrec_adcp	Total number of records collected during averaging period	n/a
yday_adcp	Year day from ADCP (drifts)	0.5 = Jan 1 GMT
press_adcp_mean	mean pressure above 2.1 mab	cm
temp_adcp_mean	mean water temperature at 2.1 mab	Deg C
press_adcp_m50	median pressure above 2.1 mab	cm
temp_adcp_m50	median water temperature at 2.1 mab	Deg C
press_adcp_std	std dev of detrended pressure	cm
temp_adcp_std	std dev of detrended water temperature	Deg C
press_adcp_length	number of records passing filter (9m < p < 12m) with outliers removed	n/a
temp_adcp_length	number of records passing filter (-25 < t < 35) with outliers removed	n/a
nshort_adcp	from unpacker - nbadChksum	n/a
nmissing_adcp	from unpacker - nbadSizeRecs	n/a
pbad1	beam1: percent bad in removing outliers (3.5*std from mean)	n/a
pbad2	beam2: percent bad in removing outliers (")	n/a
pbad3	beam3: percent bad in removing outliers (")	n/a
pbad4	beam4: percent bad in removing outliers (")	n/a
wave_height_pressure	4sqrt(sum(Snn).dF) (f > 0.05) Snn from pressure	cm
wave_period_pressure	sum(Snn)./sum(Snn.*f)	seconds
wave_height_all	4sqrt(sum(Snn).dF) (f > 0.05) Snn from surface velocity	cm
wave_height_swell	4sqrt(sum(Snn).dF) (0.05 < f < 0.15 Hz, 20 -> 6.7 Seconds) Snn from surface	cm
wave_height_windwave	4sqrt(sum(Snn).dF) (f > 0.15, > 6.7 seconds) Snn from surface	cm
wave_period_all	sum(Snn)./sum(Snn.*f) from surface velocity (f > 0.05)	seconds
wave_period_swell	sum(Snn)./sum(Snn.*f) from surface velocity (0.05 < f < 0.15Hz))	seconds
wave_period_windwave	sum(Snn)./sum(Snn.*f) from surface velocity (0.15 < f < 0.25)	seconds
wave_direction_all	wve direction from bottom PUV (f > 0.05)	degrees from Ntrue
wave_direction_swell	wave direction from bottom PUV (0.05 < f < 0.15Hz))	degrees from Ntrue
wave_direction_windwave	wave direction from bottom PUV (0.15 < f < 0.25)	degrees from Ntrue
Urms_bottom	bottom orbital velocity	cm/s
pitch	pitch	degrees
roll	roll	degrees
heading	heading*	degrees
z0	height above bottom at first bin	cm
dz	distance between bins	cm
vel_1_East_mean	Eastward component of velocity at bin 1	cm/s
vel_1_North_mean	Northward component of velocity at bin 1	cm/s
sigstren_1_mean	mean signal strength at bin 1	dB
sigstren_1_std	std dev of detrended signal strength at bin 1	dB
sigcor_1_mean	mean correlation coef (cc*100/255)	n/a
vel_2_East_mean
vel_2_North_mean
sigstren_2_mean
sigstren_2_std
sigcor_2_mean
Parameters vel_N_East, vel_N_North, sigstren_N, and sigcor_N repeat through N=25.
Snn_1	estimate of surface spectra (Snn) for each freq bin**	cm^2/s^2
Snn_2	Snn estimated from bin 2
Continuing through each frequency bin to Snn_30
Directn_1	Estimate of direction for each frequency bin	degrees from Ntrue
Continuing through each frequency bin, N=30

SN 1654

Cleaned ADCP faces 10/29/04
Cleaned ADCP faces 12/16/04
Cleaned ADCP faces 5/12/05

Turn-around 8/05

Cleaned ADCP faces 11/12/05
Cleaned ADCP faces 3/7/06
Cleaned ADCP faces 4/19/06

Turn-around 8/06

new tray installed below node raised sensors 14 cm
Pressure ht -> 2.25 cm (processing wasn't adjusted)

Turn-around 9/07

Beam 3 - Beam 3 on the node adcp faces 260 magnetic, 244 true (-45 from past deployments
new frame -> top of ADCP 2.12 m above nominal bottom

Cleaned transducer faces in Jan 29,2008

Found ADCP faces heavily fouled and cleaned again: 25 April, 2008

Node recovered: May 2, 2008 - cleaned up and redeployed May 24

ADCP faces cleaned: October 15, 2008

ADCP CorMag algorithm changed Nov, 2008

ADCP faces cleaned: March 21, 2009

ADCP faces cleaned: May 12, 2009

ADCP faces cleaned: July 14, 2009

NEW ADCP: SN 10295 deployed 9/1/09
But WA/WE error velocity and false target thresholds
set too stringently for single ping mode
Fixed problem 9/10/09
ADCP faces cleaned: October 15, 2009

Node turn-around 10/11/2010 - old ADCP (SN 1654) but newly refurbished
new firmware; new transducers; new Serial Number: 14391

Node Turn-around 6/6/2011 - SN 10295

ADCP failed (bad cable) 10/13/2011

New ADCP installed 10/24/11 (SN 1654/14391)

New ADCP installed 08/09/2012 (SN 10295) with Node turn-around with transformer
NOTE: This had troubles but we had replaced the end-cap connector
BUT: We Observed TROUBLEs with orientation and shape of tidal ellipse.

SO: We recovered and replaced SN 10295 with ADCP SN 14391 (Sep 14, 2012) but the cable didn't work. So on October 8, we replaced cable and started collecting data.

NOTE: for SN 14391 11/7/2012 changed WE from 2000 to 5000 (Vertical velocity error for single ping data). on 11/8/2012 changed WA from 50 to 255 (higher false target). This now matches SN 10295 and produces fewer flagged bad records. (See Pbad1-4 in ADCP_s data.)

Last updated: December 2012