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Carolyn J. Merry PowerPoint Presentation
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Carolyn J. Merry

Carolyn J. Merry

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Carolyn J. Merry

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  1. Dept. of Civil & Environmental Engineering & Geodetic Sci, College of Engineering The Ohio State University Columbus, Ohio 43210 Merry.1@osu.edu Using Remote Sensing to Study Ohio Carolyn J. Merry

  2. Landsat-7 Satellite • 705-km altitude • 16-day repeat cycle • 185 km swath width • Descending node at 10:00 - +15 min. • Whisk-broom scanner • Radiometric resolution: 28 (256 levels)

  3. Landsat-7 Satellite • ETM+ sensor • 30-m XS (for 6 bands) & 60-m thermal • 15-m pan band • Image data (185 km by 185 km) • $475 – raw data; $600 – corrected data • NASA developing a global archive of ETM+ • Web sites: • http://landsat7.usgs.gov • http://earthexplorer.usgs.gov

  4. Electromagnetic Spectrum • Remote sensing images are taken within specific spectral regions

  5. Landsat-7 coverage over Ohio

  6. Landsat Images DRG DLG DEM DOQQ Landsat-7 & Geospatial Data Base 164.107.56.100 Provide Data for Research & Education Integrated Solution For Geospatial Data GIS data Remote sensing

  7. OSU Campus Landsat-7 ETM+ 30-m Ikonos 4-m

  8. Ikonos 4-m XS

  9. 1984 Land Use Map – path 19/row 32 Water: 249.43 km2 Urban: 1348.53 km2 Forest: 10700.92 km2 Agriculture: 17780.62 km2 Pasture: 175.50 km2 Grass: 2609.45 km2

  10. 1999 Land Use Map – path 19/row 32 Water: 268.74 km2 Urban: 2312.35 km2 Forest: 11182.39 km2 Agriculture: 16675.65 km2 Pasture: 1308.23 km2 Grass: 1518.18 km2

  11. Urban Area, 1984 Urban Area, 1999 Urban Area Change from 1984-1999 – path 19/row 32

  12. Landsat-7 –Band 1: BlueSandusky Bay– 23 March 2001

  13. Landsat-7 – Band 4: Near InfraredSandusky Bay – 23 March 2001

  14. Landsat-7 – SanduskyBay – 23 March 2001

  15. OhioView • Archive of Landsat-7 images • http://www.ohioview.org/

  16. SeaWiFS Spatial Resolution : 1.1 km (LAC), 4 km (GAC) Radiometric Resolution: 210 Spectral Resolution: 6 visible bands, 20 nm wide 2 near IR bands, 40 nm wide AVHRR Spatial Resolution : 1.1 km (LAC), 4 km (GAC) Radiometric Resolution: 210 Spectral Resolution: 0.58 - 0.68 μm (visible) 0.72 - 1.10 μm (near IR) 3.55-3.93 μm (thermal) 10.5 - 11.5 μm (thermal) SeaWiFS Comparison to AVHRR

  17. SeaWiFS Comparison with AVHRR SeaWiFS Image August 27, 1998 555 nm AVHRR Image August 27, 1998 Channel 2

  18. SeaWiFS Comparison with AVHRR SeaWiFS Image August 16, 1998 555 nm GLFS Vertical Integrated Velocity August 16, 1998

  19. Level 2 SeaWiFS Product Creation Level 1 SeaWiFS Image Obtained From NASA Level 2 SeaWiFS Product for Chlorophyll Ancillary Data Calibration Table OC-2 Chlorophyll Algorithm

  20. SeaWiFS Level 2 Image for Chlorophyll Concentration Chlorophyll concentration color coded uniformly for all products

  21. July 5, 1998 July 11, 1998

  22. August 16, 1998 August 29, 1998

  23. September 3, 1998 September 10, 1998

  24. September 18, 1998 September 29, 1998

  25. October 12, 1998 October 21, 1998