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GLIMPSING THE FIRST PRODUCTS FROM VIIRS

GLIMPSING THE FIRST PRODUCTS FROM VIIRS. Thomas F. Lee Jeffrey Hawkins Arunas Kuciauskas Kim Richardson Jeremy Solbrig Naval Research Laboratory Monterey CA Steven D. Miller Cooperative Institute for Research in the Atmosphere Ft. Collins Colorado Sponsor: Joint Polar Satellite System.

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GLIMPSING THE FIRST PRODUCTS FROM VIIRS

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  1. GLIMPSING THE FIRST PRODUCTS FROM VIIRS Thomas F. Lee Jeffrey Hawkins Arunas Kuciauskas Kim Richardson Jeremy Solbrig Naval Research Laboratory Monterey CA Steven D. Miller Cooperative Institute for Research in the Atmosphere Ft. Collins Colorado Sponsor: Joint Polar Satellite System Dr. Wayne Esaias NASA GSFC

  2. NPP Visible Infrared Imaging Radiometer Suite (VIIRS) 0130, 1330 local time orbits “Early afternoon slot” October 28 2011 Credit: NASA

  3. VIIRS Outline VIIRS on NPP • Global observations of land, ocean & atmosphere • Multi-spectral scanning radiometer – 22 channels • Heritage: Operational and R&D sensors • Features: Wider swath, higher spatial resolution, constrained pixel growth, many applications. Credit: Ball Aerospace

  4. OLS Heritage Operational and R&D Sensors Operational Sensors OLS AVHRR • High Spatial Resolution • Day/Night Band • Minimize Resolution Growth Over Scan • Radiometric Accuracy • SST Band Continuity • 74 kg • 2 bands • 33 kg • 5 bands VIIRS R&D Sensors OMM EM MODIS • 275 kg • 22 bands SeaWiFS • Band Selection/Continuity • Thin Cirrus Band • Solar Diffuser • Earthshine Lessons Learned • Ocean ColorBands • RotatingTelescope • 220 kg • 36 bands • 45 kg • 8 bands Credit: Northrup Grumman & Raytheon

  5. VIIRS DNB MODIS SeaWiFS AVHRR Heritage Capabilities OLS Low Light Imagery 0.4 0.5 0.6 0.7 0.8 0.9 1.2 1.8 2.4 4 6 8 10 12 14 Breaks in scale Visible Mid wave IR Long wave IR [micron] Credit: Northrup Grumman & Raytheon

  6. MODIS over Africa

  7. VIIRS First Global View No Gaps Between Passes November 24, 2011 Credit: NASA

  8. .63 µm • .86 µm • 1.6 µm • 3.7 µm • 11.4 µm Comparison of “Imagery” Bandsat Nadir Wavelength AVHRR MODIS VIIRS VIIRS (11.5 µm) 1.1 km 0.37 km 0.25 – 1 km AVHRR

  9. 375 m (I5) Image of New Orleans Area January 19 2012 Daytime Credit: Dan Lindsey CIRA

  10. Spatial Resolution Comparisons for VIIRS, AVHRR, and OLS at Nadir and Across Swath Credit: Northrup Grumman & Raytheon

  11. Spatial Resolution Comparisons for VIIRS, AVHRR, MODIS and OLS at Nadir and Across Swath Because of aggregation VIIRS has much better resolution away from nadir, pixel area 8 times smaller than AVHRR or MODIS Northrup Grumman & Raytheon

  12. Crisp at the Edge

  13. VIIRS Applications Reflectance (solar) bands Ocean Color Aerosol Visible -> Near IR -> Shortwave IR Midwave IR -> Longwave IR Sea Surface Temperature Atmospheric Correction Day Night Band (fires, nighttime smoke) Vegetation True Color Fog (night) Water clouds (tops, properties, temperature) Volcanic Ash, Dust (suspended) 0.4 1.0 0.6 0.8 0.2 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 3.0

  14. Conclusions • Encouraging results so far! • 0130, 1330 Orbit nicely fills “afternoon” slot • VIIRS blends operational lessons with recent R&D • High resolution to to the edge of scan • Effective set of channels for applications • DNB will have unique capability

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