ESS 421 - 1st half topics covered in class, reading, and labs

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ESS 421 - 1st halftopics covered in class,
reading, and labs

• Images and maps - (x,y,z,l,t)
• Temporal data - Time-lapse movies
• Spatial data - Photos and interpretation
• Spectral data
• Electromagnetic spectrum
• Absorption and Beers law (te-kz)
• Transmission
• Reflection
• Scattering and Lamberts law ? RIo(cos i)/p
• Interaction of light and materials
• Electronic processes (VNIR)
• - electron transition (VIS), sharing (UV),
  crystral field (NIR)
• Vibrations and overtones (SWIR-TIR)
• Gas, liquid, glass, crystalline
• Spectra of common materials
• leaves, soil, water, clouds, snow, iron oxides,
  hydrated minerals

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ESS 421 - 1st halfkey areas for midterm
(Tuesday, 9 February 930-1020)

• Questions may be drawn from labs, lectures, text
• Basic remote sensing parameters
• irradiance, radiance, and their units
• the electromagnetic spectrum
• thermal emission
• Atmospheric effects and scattering processes
• Scattering and reflection from surfaces
• Spectroscopy fundamentals
• Spectra of common materials

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Thursday 4 February
Class 10 Earth-orbiting satellites and Review
No Reading Last lecture Spectroscopy, mineral
spectra
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Orbit Platform Sensor
C-130
Sputnik
1957 Sputnik
1999 EOS
Sputnik 2 with Laika
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Airborne platforms test beds, flexible paths
SEBASS Hyperspectral TIR sensor in a Twin Otter
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Orbits Key elements - eccentricity -
inclination - periapsis
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Inclination
Low inclination
High inclination
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Hubble Space Telescope low inclination most
Shuttles - low inclination
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Exception SRTM i58º
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High-inclination orbits
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(No Transcript)
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Special case Sun-synchronous orbit (i -81º)
Satellite is overhead at same local solar time
all year Why would you choose - late morning?
- mid afternoon? - early morning?
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Global coverage
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• Sensor characteristics
• spatial resolution and field of view
• spectral resolution
• spectral coverage
• number of bands
• Spatial resolution depends on experiment
• high spatial detail, less emphasis on
  spectroscopy
• moderate environmental monitoring
• low weather, oceanography
• Spectral resolution
• panchromatic
• multispectral
• hyperspectral (imaging spectroscopy)

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• Spectral coverage
• Optical
• reflected sunlight
• thermal infrared
• LiDAR
• Microwave
• passive
• Radar
• Gamma ray, X ray, geophysical (magnetic, gravity
  fields)

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Thematic Mapper
LANDSAT SUN-SYNCHRONOUS ORBIT
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Tuesday class

• Midterm