Environmental Data Collection Using Autonomous Wave Gliders���

LCDR Kate Hermsdorfer Qing Wang, Dick Lind, Ryan Yamaguchi

Meteorology Department, NPS John Kalogiros (NPS contractor)

National Observatory of Athens, Athens, Greece Kevin Smith

Physics Department, NPS

CRUSER Monthly meeting presentation 06Oct2014

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Overview

• Wave Glider (SHARC) • What – CRUSER Funded

Research Goals • Why – Naval Applications • How – Sensor Integration and Field Tests

• Results • Future Work

SHARC

• Created by LRI in 2007 • Wave-powered

– 1.5 kts average – 1 year endurance!

• Two empty payload bays • Nav/Comms

– Iridium • Uses • NPS has two SHARCs!

Original SHARC Sensor

• Mako • LRI Basic METOC model

– AIRMAR PB200 weather station

Pressure, Temperature, Wind Speed and Direction 10 min averaged data

Previous Evaluation Efforts

• Existing measurements – NAVO comparisons

– PacX Data

• 5

(David Wang, NRL, 2012)

Project Objectives

• Evaluate default SHARC METOC sensor

• Develop and integrate new METOC payload using sensors with known measurement quality

• Field experiment for Airmar and new METOC payload evaluation – Co-deploy SHARC with NPS MASFlux Buoy

• Evaluate SHARC as a platform for near-surface data collection for various Naval applications – Electromagnetic (EM) wave propagation

– Forecast model evaluation

Near-Surface ���Physical Processes

WWW.NPS.EDU

Naval Applications

• Forecast Evaluation and Improvement – Near-surface observations – Coupled model – Surface flux parameterization

• EM Propagation – Evaporative duct study – Observations for input into operational propagation models as tactical decision aids

(Frederickson et al, 2000)

SHARC as a METOC ���Platform

(From  Liquid  Robo.cs  Federal  Product  Specifica.on,  SV3)  

Marine Air-Sea Flux (MASFlux) Buoy

Direct flux measurements Bulk flux estimates 2-D wave spectra Top water layer temperature Fixed location/drifting Limited sea conditions

Bulk flux estimates 2-D wave spectra Water temperature profile Autonomous Broad sea conditions

Instrument Development

 Sensor Measured variables

Rotronic Model MP100H Temperature Relative humidity

Vaisala Weather Transmitter WTX520

Wind speed and direction Barometric pressure Temperature

Relative Humidity

Campbell Scientific Temperature Probe Model 109SS

Sea water temperature

Garmin GPS16-HVS Position Velocity

Magnetic declination

True North Revolution Technologies GS Gyro Stabilized Electronic Compass

Heading Pitch Roll

VectorNav VN-100 Rugged Accelerometer

Angular rates, linear accelerations Magnetic field components

New METOC Mast for SHARC

WTX520

Rotronic

Garmin GPS 1 m

Data Acquisition System (in Aft

Bay)

Additional batteries (in

Forward Bay)

METOC Payload���At Sea Testing

• Three deployments – Monterey Bay – Day 3: 1.5 m swells!

• Five hours of data collected each underway

• Deployment / Recovery – Non-trivial!

The Fun Stuff!

Data Acquisition System

MASFlux and SHARC co-deployment

R/V Fulmar

Preparation

Me at Sea!

Deployment / Recovery

• Challenging! – Ensure safety and security of sensors and SHARC

• Used Fulmar A-Frame • Progressively added taglines – Increased stability – Decreased risk of collision between SHARC and R/V

• Training:

• Final Day of Field Work:

Initial Results

-("a

D.. ,l; -~ ::J 0 0 ~

20140729

--MASFiux (1 .83m) - SV2(1m)

1018_5 ...... ~ ............................. - - Airmar (1m)

~ 1017.5

1

. I I 1

....... .

1 017 L..1_7,_; 0-0--1-8 ...... : 0-0--19 ...... :0--0:----:-20:-":0:-:0:-----=-2-:-"1 :~00 Time (HH:MM UTC)

20140729

5 ······~······ ··· ······· · ······ · ··············· · ·····=······· · ········

13 ·····'··········· ' ·· r · --g 2 ). .. ........ l .............. --Wspd Sonic (3.48 m) i ; - Wspd2 (1.83 m)

1 ...... : ...... .. ............. ~ ............. - Wspd1 (0.87 m) ~ - SV2

--Airmar OL--~----_.--~------~~~--~~

17:00 18:00 19:00 20:00 21 :00 Time (HH:MM UTC)

WWW.NPS.EDU

Initial Results (cont)

23 20140729 --MASFiux T4 (3.07 m)

,....--~-------r--------,....-------1 --T3 (1.54 m)

: : ........ : - T2(0.77m) ............. : .............. .. ....... .. ................... .. 1 ... .. .... .... , , ...... ,.,, .... .. .. .......... T ..... ... ......................... .. ... .... --T1 (0.38 m)

. . I \ . : ~ I \ ~ --SV2

u-21 ... : ....c : / '....... : . ' ..... ~· .:.;.._;~~.; ·~~ t:"'., .... ' .. .. .. .. ' ... .... ' ' .. ... !~ ...... ~ .. ..... ... ' ... '' ... ' ... ...... :';".~ . ....;. ·; ...... .... ... . ' ... . .. . ' ' ... ........... ... .

~ %i'' j ' ...... ---: ~ -.....__ i : / . '..... / : : - \ 0 - > ~ ..... ...... ~ ~ \

...... : ........ . ... ... . .... ...... .. . . . . ..... ... = ...... .. ...... .... . .. ..... .. .. ...... ... ...... . : .. ... . .... ........ \ ........ ... ..... . ... . ..

. : : \ : \ : \

... ~ .. ... ..... .......... ........ .. ......... ~ .. .. .................. .... ... .. ........ ..... .. [····· .. ······ · ····· ···~:-..,.~·~ ·.:: ::.: ::.·j-;-/. ..... .. ~~ ·~~·~·~·;·.::~~·~·· : : . . . . . . . .

15~--_.--------------~--------------------------------------------~~ 17:00 18:00 19:00

Time (HH:MM UTC)

WWW.NPS.EDU

20:00 21 :00

Ongoing Evaluation

• Static Comparison • Controlled Environment

– Eliminate SHARC movement

– Eliminate Airmar algorithm • Sampled at same rate (1 Hz) • Compare raw data

Future Work

• Further data analysis • Paves the way… • CASPER (presentation by Qing Wang Nov 03 CRUSER Monthly meeting) – Duck, NC – Southern CA

• EM Propagation • Direct Flux Sensing payload

– Including water vapor flux! • Not currently available at near-surface level

Questions/Comments

• 18