The Project

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The Project

• Science Education through Earth Observation for
  High Schools

Tutorials 6 9Optics, Spectroscopy and Laser
Remote Sensing
Rainer Reuter, Christina Klose andHendrik Jan
van der Woerd
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Understanding Spectra from the Earth
Source NASA
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Understanding Spectra from the Earth

• ... focuses on
• the fundamental properties of light and radiation
  
• the interaction of light and matter

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Understanding Spectra from the Earth

• ... focuses on
• the fundamental properties of light and radiation
  
• the interaction of light and matter

• ... covers the basic elements of earth
  observation from space
• solar radiation and its interaction with the
  atmosphere and the earth surface
• the information content of spectra
• the methods of spectral measurement

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Spectra from the Earth
Light and radiation
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Spectra from the Earth
Electromagnetic waves...
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Spectra from the Earth
Electromagnetic waves...
...linear polarisation
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Spectra from the Earth
Electromagnetic waves...
...circular polarisation
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Spectra from the Earth
Light is better described
as photons!
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Spectra from the Earth
Light is better described
as photons!
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Spectra from the Earth
Light is better described
as photons!
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Spectra from the Earth
Colour vision through photons in 3 channels...
...is not a spectral measurement
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Spectra from the Earth
Physical spectra intensities over the wavelength

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Spectra from the Earth
Example The solar spectrum
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Spectra from the Earth
The IR emission spectrum of the earth...
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Spectra from the Earth
...and the re-emission from the atmosphere
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Spectra from the Earth
...and the re-emission from the atmosphere
this is thegreenhouse effect!
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Spectra from the Earth
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Spectra from the Earth
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Laser Remote Sensing
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Laser Remote Sensing

• ... focuses on
• the fundamental properties of light and radiation
  
• the interaction of light and matter

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Laser Remote Sensing

• ... focuses on
• the fundamental properties of light and radiation
  
• the interaction of light and matter

• ... but it emphasises on subjects such as
• principles of lasers and laser light generation
• beam propagation through atmosphere and oceans
• excitation of fluorescence and Raman scattering
• applications in earth observation

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Laser Remote Sensing
Schematic of a lidar
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Examples of lidar measurements
Source NASA
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Laser Remote Sensing
Example of a lidar measurement
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Laser Remote Sensing
Laser light is...
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Laser Remote Sensing
Laser light is...
...monochromatic
Laser line
Incandescent lamp
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Laser Remote Sensing
Laser light is...
...coherent and subject to interference
effects
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Laser Remote Sensing
Laser light is...
...coherent and subject to interference
effects
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Laser Remote Sensing
Hydrographic lidar
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Laser Remote Sensing
Hydrographic lidar
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Laser Remote Sensing
Oil is fluorescent
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Laser Remote Sensing
Oil is fluorescent
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Laser Remote Sensing
Banknotes are also fluorescent
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Laser Remote Sensing
Phytoplankton blooms are fluorescent
Source ESA
True colour image
Chlorophyll fluorescence simulation
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Laser Remote Sensing
Fluorescence
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Laser Remote Sensing
Fluorescence
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Laser Remote Sensing
Fluorescence
Phosphorescence
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Application of fluorescence Oil spill
quantification and classification with remote
sensing
Source EARSeL eProceedings
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Laser Remote Sensing
Principles of Rayleigh scattering
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Laser Remote Sensing
Principles of Rayleigh and Raman scattering
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Laser Remote Sensing
Principles of Rayleigh and Raman scattering
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Thank you!