Suomi National Polar-orbiting Partnership (NPP) N. Christina Hsu NPP Deputy Project Scientist npp.gsfc.nasa.gov.
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Suomi National Polar-orbiting Partnership (NPP)
N. Christina Hsu
NPP Deputy Project Scientist
npp.gsfc.nasa.gov
NPP Mission: Make Environmental Observations
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Provide Data for Weather Forecast Models
Short term Environmental Observations (Events)
Long term Environmental Observations (Climate Change Detection)
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
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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
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.
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
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443
486
555
671
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
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
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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
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.
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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
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