VIIRS CAL _ Val Ocean Color

January 31, 2013

Stennis Update USM, NRL, SDSU

Highlights

1 - Presentations in last 3 months 1) Fargion, G.S., et al,. “VIIRS Ocean Color Data For Coastal Management” abstract AGU-San Francisco. Dec 8 – 2012

2) Arnone, R.A. et al., Applications of Emerging satellites for ocean bio-geo chemical and physical processes” invited AGU-San Francisco , Dec 8 – 2012

3) Bowers, J, et al “Exploring Regional Adjustment Of Coastal VIIRS By Repurposing On-Orbit Vicarious Calibration Methodology”, AGU-San Francisco , Dec 8 – 2012

4) S. Ladner, S., et al “Evaluation of Recent VIIRS Sensor Performance in the Coastal Ocean”, AGU-San Francisco, Dec 8 - 2012 .5) Planned SPIE conferences and IGARRS

2 - VIIRS Clouds Mask - Improvement to the Threshold 3 - Evaluate of MX6.6 - Negative radiance, Inland waters, 4- AERONET Improvements for Match up

WAVECIS – Time of day calibrate – expanded Angles Eureka - MVC0 – updated

5 - VIIRS product validation (vicarious calibration) in coastal waters (using SAVANT)SAVANT – matchup tool updated

6. Cruise Validation - 5 cruises

VIIRS Cloud MASK (VCM)

Albedo 865 0.027

VCM 3

3 - Confidently Cloudy

VCM 2,32- Probably Cloudy or 3- Confidently Cloudy

VCM 1,2, 30 – Confidently Clear 1- Probably clear 2- Probably Cloudy 3- Confidently Cloudy

-Evaluation of VCM on Ocean Color products - comparison with “Standard Ocean color,

Cloud Mask.” ( NASA, NAVY, NOAA) - Program review in Jan 2013 - For Color products VCM performed “Very well “. -Noted improvement to present (Threshold method) . Separates the Glint mask - Caspian Sea 7-24- 2012

Glint

Present Cloud mask

VCM

By monoring the vLt/Lt over time VIIRS seems to be performing well. Some anomalies are expected as these coastal sites.

VIIRS Coast Validation using AERONETS with SAVANT (tool) - Trend of the “GAIN” - Vicarious adjustment of the VIIRS using nL2 gen- Different regions show “slight” different trends .. - Waiting the MX 6.6 EDR to obtain more retrievals to run statistics on IDPS EDR - Validation within 1% based on the Spectral Gains !!

Venice - AAOT

EUREKA

WAVECIS

412 - 442490555668G

ain

Julian Day

nLw 668 – Low

668 – high

~ +2.5%

+~.001% ~ +.01%

Mean Gains %412 0.997699 -0.23442 0.999162 -0.08490 1.01088 1.09555 1.017691 1.77668 1.011019 1.10

VOCC IDPS MX6.6 Update IDPS - Over Masking

Old IDPSOPERATIONAL

SYSTEMNegative Radiance

masking

MX6.6 6.6 IDPSOPERATIONAL

SYSTEM JANUARY 2013

CURRENT L2gen

APS

- Updates to MX6.6 Inland lakes - High Satellite angle - Do not mask as Negative but retrieve value and use Quality Flags

MX 6.6 Check out ! US East Coast GS

APS (n2gen) VOCCO Mx6.6

-MX6.6 improvement to retrievals ! - Processing ocean color and not negative - Issues with differences in values (Coastal areas are high in VIIRS ) - WILL ENABLE MORE VIIRS MATCHUPS!

Inland lakes !Coastal retrievals!

0.1 0.2 0.3 0.4 0.5 0.6-0.1

2.77555756156289E-17

0.1

0.2

0.3

0.4

0.5

0.6

f(x) = 0.701174958212948 xR² = 0.89561470103671

f(x) = 0.838404265747844 xR² = 0.876374896972341

"N2GEN Viirs (n=71)Linear ("N2GEN Viirs (n=71))

Insitu Chlorophyll ( mg/m3)

Sate

llite

Chlo

roph

yll

190 Stations

NRL n2gen ~55% more retrievalsthan IDPS (masking)

M VIIRS IDPS

VIIRS – Gov software

lamda r2 PerDiff r2 PerDiff410 0.836424 17.66 0.929217 17.1443 0.976641 9.99 0.978796 8.74486 0.991231 7.51 0.990916 5.35551 0.975921 14.9 0.987854 16.64671 0.961313 53.76 0.944684 49.86

Key WestStations

Cruise Ocean VIIRS Validation 1- Key West 2- Gulf of Mexico (fisheries) 3) Carbon Flux Cruise (Gulf and East Coast) * 4 ) Glider 5) Hawaii

Sample #

bb53

2nmPanama

City, FL

Backscattering 532

- Update the matchup with the Mx6.6 - with VOCCO from Classwithin SAVANT AERONET

- Presentations and papers underway..

SPIE – Baltimore - Coupling VIIRS and MODIS for Coastal Processes

IGARS –

- Validation cruises - Gulf of Mexico - MOBY re analyses analyses

- Address the DR - Coastal products and aerosols

Summary / Plans

VIIRS - Surface Chlorophyll Tracking the MS River Plume

Warm Core Eddy

Origin of Gulf Stream

Clouds

MS River water

.01 0.054 0.29 mg/m^3 1.6 8.4 45

Chlorophyll

Mississippi River Delta

N28o

N26o

N24o

N22o

Sept 20, 2012

Convergence