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Section 8 Science Validation Process

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godley
37 diapositives · 398 Views · Jan 04, 2020

The Science Validation Team, in collaboration with NASA Selected Investigators and international collaborators, validates and refines the pre-launch characterizations of EO-1 instruments. They assess the instruments' ability to make Landsat-like observations and address earth remote sensing applications. Additionally, the team assists in technology validation and facilitates commercial applications.

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Section 8 Science Validation Process
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  1. Section 8 Science Validation Process

  2. Science Validation Team • Instrument Team • Validate/re-establish and refine pre-launch characterizations • Provide technology validation • Participate on Science Validation Team • NASA Selected Investigators • Conduct scene based instrument performance characterizations • Measure ability of instruments to make Landsat-like observations • Assess capability for addressing earth remote sensing applications • Assist in technology validation • Facilitate Commercial Applications (CRSP/SSC) • International Collaborators • Argentina, Australia, Canada, Italy, Japan, Singapore

  3. If scientists supply accurate and reliable information, policy makers can make intelligent and responsible decisions to preserve an acceptable quality of life for our children and grandchildren.

  4. Characterization & Validation • Characterization quantitatively describes how the three EO-1 instruments respond to incident radiation (light) under a variety of operating conditions. • Validation assesses the EO-1 instrument measurements by comparing them against ground “truth”. We also assess performance.

  5. What’s So Exciting About Calibration? • Calibration is the stuff you do to insure accurate and repeatable measurements with the EO-1 instrumentsHo hum! • Calibration can be used to provide a common basis for inter-comparing global measurements across a variety of earth satellite observing systems with profound ramifications!

  6. EO-1 and Landsat Landsat-7 EO-1 Less Than 1 Minute Landsat ETM+ Multispectral Swath Coverage (185 km @ 30 m) ALI Multispectral Swath Coverage (37 km @ 30 m) Atmospheric Corrector Hyperspectral Coverage (185 km @ 125 / 250 m) AVIRIS Underflight (10 km @ 20 m) Hyperion Hyperspectral Swath Coverage (7.5 km @ 30 m) 705 km Altitude

  7. EO-1 ALI Landsat 7 ETM+ N EO-1 Atmospheric Corrector EO-1 Hyperion (7.5 KM) (37 KM) (185 KM) EO-1 and Landsat 7Descending Orbit Ground Tracks

  8. EO-1 Instrument Overviews ALI 37 3 * Excludes thermal channel ** 35 cm-1 constant resolution

  9. EO-1 Instrument Overviews 37 3 * Excludes thermal channel ** 35 cm-1 constant resolution Hyperspectral Analysis derives from the use of contiguous spectral channels, allowing the use of derivatives and sophisticated analysis techniques. The large number of bands allows more complex systems to be addressed without the under sampling inherent in multispectral systems.

  10. Investigator Research Topics

  11. Investigator Research Topics(continued)

  12. Investigator Research Topics(continued)

  13. SAC-C EO-1 Terra Landsat-7 12 min 1 min 27 min 10:03 10:15 10:02 10:42 The EOS AM Constellation Alignmentfor March, 2001

  14. AM Constellation Descending Orbit Ground Tracks Terra MODIS SAC-C N Landsat 7 ETM+ EO-1 ALI EO-1 Hyperion EO-1 Atmospheric Corrector

  15. EOC HS Task Sites Hyperion Sites Kakadu Cape Tribulation Lake Argyle Cooper Creek Daintree Batt Reef Mossman Townsville Reef Port Hedland Goldsworthy Panorama Kunoth Amburla Lake Eyre Moreton Bay Mt Fitton* Tinga tingana Toolabin *Uardry EOC Hyperspectral Sites Lake George *Kioloa Majura Valley Tanjil Bren * Potential 1st 60 days Sites X band sites

  16. Zone 4 Jujuy Zone 2 Resistencia Zone 3 S. M. de Tucumán Zone 1 Posadas Zone 5 La Rioja Zone 7 Mendoza Zone 6 Córdoba Zone 0 Buenos Aires Zone 8 Neuquén Zone 11 Madryn Zone 9 Comodoro Rivadavia Zone 10 Gdor. Gregores Argentina Validation Site Zone Map for AVIRIS and EO-1/SAC-C overflights

  17. Argentine Test Sites Cordoba Mendoza Madryn

  18. “First Light” Image of Alaska L7 PAN ALI PAN

  19. Why Is the ALI Pan Band Better Than the ETM+ Pan Band? • Improved Radiometric resolution • Superior signal-to-noise • 12-bit versus 8-bit representation of dynamic range • Inherently higher contrast measurement • ALI pan restricted to 480 – 490nm VIS spectral interval • ETM+ spans vegetation transition rise (520 – 900nm) • Smaller pixel size (IFOV) • ALI pan IFOV is 10 meters • ETM+ is nominally 15 meters (effectively 18 meters)

  20. Hyperion Image - Argentina • Hyperspectral DCE Acquired Dec 1, 2000 • Color image produced using 3 bands in visible • Blue = band 14 (488 nm) • Green = band 20 (549 nm) • Red = band 38 (731 nm) (red shows areas of new spring growth) Image No. EO12000336_002002C_r1_image0su Approx. 7.5 km wide x 65 km long NORTH

  21. Area of First Hyperion Image Collection (Green Square) Area of First Image