IMaRS Remote Sensing and Oceanography

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• IMaRS Remote Sensing and Oceanography
• David Palandro
• Laura Lorenzoni
• Frank Muller-Karger
• Institute for Marine Remote SensingCollege of
  Marine ScienceUniversity of South Florida 140
  7th Ave. SouthSt Petersburg, FL 33701(727)
  553-3987(727) 553-1103 FAXpalandro_at_marine.usf.ed
  uhttp//imars.usf.edu

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Outline

• Basics of remote sensing
• What is remote sensing?
• Theories and definitions
• Missions and sensors
• Introduction to website and tools
• Hands-on IMaRS website
• Provide lesson plans
• Lesson plan building
• Build a lesson plan from IMaRS website
• Hands-on IMaRS website
• Present and feedback
• Present lesson plans to the group
• Evaluate IMaRS website
• Adjourn

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What is Remote Sensing?

• In the broadest of terms, remote sensing is the
  study of one location from a different location.
• There are various types of sensors used in remote
  sensing that include optics (visual and infrared
  spectrum) and acoustics (sound).
• These sensors can be carried on a ship, airplane,
  satellite, or even a balloon.
• Multi-disciplinary

"Remote Sensing is the science and art of
obtaining information about an object, area, or
phenomenon through the analysis of data acquired
by a device that is not in contact with the
object, area, or phenomenon under investigation."
- Lillesand and Kiefer
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Definitions

• Spatial Resolution
• The size of the area that is covered by one pixel
  of data, the higher the spatial resolution the
  smaller the pixel.
• Temporal Resolution
• The amount of time it takes for the sensor
  to
• revisit the same spot on the planet.
• Spectral Resolution
• The number of discrete bands used by the
• sensor as well as the number of bands total
• based on the EM spectrum.

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Pixel Size
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Electromagnetic Spectrum
The satellite sensor measures the amount of light
being given off, or radiated, by the earths
surface at specific wavelengths in the
electromagnetic spectrum.
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Radiative Transfer Theory
Cloud
Atmosphere
Sea Surface
Ocean
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Advantages of Remote Sensing

• Obtain large-extent images of the oceans
• Climate studies
• Local and large-scale studies
• Remote (inaccessible) areas
• Make measurements impossible otherwise
• Oceanic rainfall, distribution of small waves,
  extent of phytoplankton patches and relationship
  to SST, etc.
• Time series studies made possible

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Global image showing ocean color from SeaWiFS
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Disadvantages of Remote Sensing

• High-tech issues
• Rapid to change, hard to follow literature
• 2-Dimensional
• Near or at-surface measurements only
• Interpretation
• Products based on many assumptions
• Programming errors
• Unknown calibration problems
• Unknown orbit or sensor errors, etc...

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Sea-Surface Temperature
NOAA NPOESS (AVHRR)
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Advanced Very High Resolution Radiometer
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AVHRR-SST
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Ocean Color
NASA SeaStar (SeaWiFS)
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Sea Viewing Wide-Field-Of-View Sensor
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SeaWiFS-chl_a
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MODIS-RGB
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Bottom Habitat Discrimination
NASA Landsat 7 (ETM)
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Landsat 7 Enhanced Thematic Mapper Plus
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Landsat-RGB
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The IMaRS Web Site

• http//imars.usf.edu