Suomi National Polar-orbiting Partnership (NPP) N. Christina Hsu NPP Deputy Project Scientist npp.gsfc.nasa.gov.

Suomi National Polar-orbiting Partnership (NPP)

N. Christina Hsu

NPP Deputy Project Scientist

npp.gsfc.nasa.gov

NPP Mission: Make Environmental Observations

2

Provide Data for Weather Forecast Models

Short term Environmental Observations (Events)

Long term Environmental Observations (Climate Change Detection)

3

NPP with 5 instruments

VIIRS

CrIS

OMPS

CERES

ATMS

13.2 ft long8.5 ft wide 4,500 lbs

MSO - 4

NPP NPP SpaceSegment

SpaceSegment

NESDISCentral

AFWACentral

NPP System Architecture NPP System Architecture GPS

WSCLEO & A Backup T&C

TDRSS

LaunchSupportSegment

LaunchSupportSegment

Direct Broadcast User

Climate UserCommunity

I/F Data Proc

Segment

I/F Data Proc

Segment

InfraInfra

IngestIngest

Pro

cess

Pro

cess

Data DelData Del

InfraInfra

IngestIngest

DQMDQM

Pro

cess

Pro

cess

Data DelData Del

NPP Mission Data Command and Telemetry

Key:

Archive & Dist

Segment

Archive & Dist

SegmentIngest

ArchiveInterchange

ArchiverRoboticStorage

Datastore

Inventory

Command,Cntrl & Comm

Segment

Command,Cntrl & Comm

Segment

GSE - SvalbardPrimary T&CNPP SMD

Mission Mgmt Center - Suitland

• Flight Operations Team• Enterprise Management• Mission Management• Satellite Operations• Data Monitoring

& Recovery

Data HandlingNode

Data Routing & Retrieval

MSO - 4

Science Data

Segment

Science Data

SegmentSD3E

LandPEATE

OceanPEATE

OzonePEATE

AtmosPEATENICSE

SounderPEATE

I&TSE

Data MgtData Mgt Data MgtData Mgt

5

Visible Infrared Imaging Radiometer SuiteRaytheon SAS El Segundo, Ca

Description

• Purpose: Global observations of land, ocean, & atmosphere parameters at high temporal resolution (~ daily)

• Predecessor Instruments: AVHRR, OLS, MODIS, SeaWiFS

• Approach: Multi-spectral scanning radiometer (22 bands between 0.4 µm and 12 µm) 12-bit quantization

• Altitude: 824 km

VIIRS on NPP

General Characteristics for VIIRS Granule

Temporal coverage: ~86 secondsResolution: 375 m at nadir for 5 I (imagery-

resolution) bands and DNBResolution: 750 m at nadir for 16 M

(moderate-resolution) bands Swath: ~3000 km Numbers: ~70 granules/orbit, ~100

minutes/orbit, ~1000 granules/dayEquator crossing: ~1:30 pm local time

VIIRS Bands and Products

Dual gain band

Name of Product Group Type Imagery * Imagery EDR Precipitable Water Atmosphere EDR Suspended Matter Atmosphere EDR Aerosol Optical Thickness Aerosol EDR Aerosol Particle Size Aerosol EDR Cloud Base Height Cloud EDR Cloud Cover/Layers Cloud EDR Cloud Effective Particle Size Cloud EDR Cloud Optical Thickness/Transmittance Cloud EDR Cloud Top Height Cloud EDR Cloud Top Pressure Cloud EDR Cloud Top Temperature Cloud EDR Active Fires Land Application Albedo (Surface) Land EDR Land Surface Temperature Land EDR Soil Moisture Land EDR Surface Type Land EDR Vegetation Index Land EDR Sea Surface Temperature * Ocean EDR Ocean Color and Chlorophyll Ocean EDR Net Heat Flux Ocean EDR Sea Ice Characterization Snow and Ice EDR Ice Surface Temperature Snow and Ice EDR Snow Cover and Depth Snow and Ice EDR

VIIRS 22 Bands:16 M_ Band, 5 I_Band and 1 DNB

VIIRS 24 EDRsLand, Ocean, Atmosphere, Snow

* Product has a Key Performance attribute

Monitoring Disasters:Deepwater Horizon Oil Slick

April 29, 2010

Smoke Plumes from New Mexico Fires May 25, 2012

The large New Mexico fire complex, referred to as the Whitewater-Baldy fire, was observed by VIIRS at 2017 UTC on May 25th. As of June 1st, the fire had burned 197,333 acres.

Progression of Dust Storm over Southwest Asia: 3 overpass from Terra, NPP, to Aqua

VIIRS Chlorophyll-a Data Overall Performance

(Results Consistent with MODIS-Aqua)

Slide courtesy of Menghua Wang and Ocean Color Team.

• VIIRS OC data compared with the MOBY in situ data, showing that SDR data since 2/6/2012 are good and reasonable, before that SDR date were poor/not reliable. • VIIRS ocean color products are good and reasonable from 2/6/2012.• Vicarious calibration is needed and will further improve ocean color products.

MOBY PI: Ken Voss

VIIRS vs. MOBY In Situ

Data from M. Wang

412

443

486

555

671

VIIRS SDR Thermal Bands : SST

Night time SST from U Miami RSAS Evans/Minnett

SST bias ~ 0.45K

Sea Ice: The Shifting Crust of the Southern Ocean(M. R. Drinkwater and J. C. Comiso – ESA, NASA GSFC)

Photo by Brien Barnett, NSFPhoto by Brien Barnett, NSF

Ross Sea ice jams the channel where the mighty B-15A iceberg broke apart in October 2003Ross Sea ice jams the channel where the mighty B-15A iceberg broke apart in October 2003

VIIRS Products: sea ice temperature, characterization, snow cover/depth

VIIRS DNB

Resolution Improvements: OLS vs. DNB

740 m instantaneous geometric field of view (DNB) from VIIRS vs. ~5 km for the OLS from DMSP results in dramatic spatial resolution improvements.

DNB Imagery courtesy of Steven Miller CIRA/CSU 16

Resolution Improvements: OLS vs. DNB

17

740 m instantaneous geometric field of view (DNB) from VIIRS vs. ~5 km for the OLS from DMSP results in dramatic spatial resolution improvements.

DNB Imagery courtesy of Steven Miller CIRA/CSU

18

Questions?

VIIRS Anomaly

VIIRS M05/M04/M03 (red/green/blue) VIIRS M15 (10.76 microns)

color scaled from 225K to 325K 19 January 2012

VIIRS M07 (0.865 microns) grey scaled19 January 2012

•VIIRS Data Anomaly highest in this band

•Degradation in M7/I2 observed after launch.•Smaller effect in M6 & M5.•Commissioning paused while anomaly was studied.

•Degradation believed to be caused by an error in mirror coating process. An inadvertent layer of tungsten film was put on telescope mirrors. •Commissioning resumed Jan 18

•Degradation is slowing, should level off.

•No effect on VIIRS data products;VIIRS Signal-to-Noise (SNR) in M7 expected to be above spec.

VIIRS Degradation Prediction

4-mirror thin-layer model

22

NPP Instrument Status: VIIRS SDR

• All band are producing excellent images with expected quality

• All onboard calibrators (BB, SD, SDSM) are functioning normally, providing good quality data for SDR calibration

• Reflective Solar Band (RSB) LUT have been successfully updated on-orbit;

• VIIRS SDR Inter-comparisons show good agreement with Aqua/MODIS after the LUT updates

• Thermal Emissive Bands (TEB) response is stable, and consistent with pre-launch analysis

23

Questions?

Fishing boats