ESS 421 - 1st half topics covered in class, reading, and labs Images and maps - (x,y,z,,t) Temporal...
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Transcript of ESS 421 - 1st half topics covered in class, reading, and labs Images and maps - (x,y,z,,t) Temporal...
ESS 421 - 1st halftopics covered in class, reading, and labs
Images and maps - (x,y,z,,t)
Temporal data - Time-lapse movies
Spatial data - Photos and interpretation
Spectral data
Electromagnetic spectrum
Absorption and Beer’s law (=e-kz)
Transmission
Reflection
Scattering and Lambert’s law R=Io(cos i)/
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
ESS 421 - 1st halfkey areas for midterm (Tuesday, 9 February 9:30-10:20)
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
Class 10: Earth-orbiting satellitesand Review
Thursday 4 February
No Reading
Last lecture: Spectroscopy, mineral spectra
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?
Sensor characteristics
- spatial resolution and field of view- spectral resolution- spectral coverage- number of bands
Spatial resolution depends on experimenthigh – spatial detail, less emphasis on spectroscopymoderate – environmental monitoringlow – weather, oceanography
Spectral resolutionpanchromaticmultispectralhyperspectral (imaging spectroscopy)
Spectral coverage
Opticalreflected sunlightthermal infraredLiDAR
MicrowavepassiveRadar
Gamma ray, X ray, geophysical (magnetic, gravity fields)