remote sensing what can we do with it?. the early years

Remote Sensing

What can we do with it?

The early years

Yellowstone Fires 1988, Recorded 7/2001

How it worksHow it works

Incoming solar energy

Reflecting surfacesScatter, absorb,and reflect light

Electromagnetic EnergyElectromagnetic Energyand surface reflectanceand surface reflectance

Spectral ReflectanceSpectral Reflectance

Progression of common satellitesProgression of common satellitesMSS spatial scale 20m, TM 30mMSS spatial scale 20m, TM 30m

Satellite SensorsSatellite SensorsSatelliteSatellite Spatial ResolutionSpatial Resolution Spectral ResolutionSpectral ResolutionQuickBirdQuickBird 1-4meters1-4meters .45-.90µm.45-.90µmIkonos1&2Ikonos1&2 1-4meters1-4meters .45-.90µm.45-.90µm

SPOTSPOT HR-XSHR-XS 10-20meters10-20meters .51-1.75µm.51-1.75µm

LANDSAT TM 7LANDSAT TM 7 (1)(1) 15m15m .45-.515µm.45-.515µm(2,3,4,5,7) 30m(2,3,4,5,7) 30m .525–2.35µm.525–2.35µm(6)(6) 60m60m 2.09-2.35µm2.09-2.35µm

AVRISAVRIS 20m20m 224 bands224 bands

Sun Synchronous Orbital Flight Row and Path

TM 30 meter multi-spectral imagery

Keweenaw Peninsula, bands 2, 3 and 4 provide a color composite

Summer AVHRR CompositeSummer AVHRR Composite Spatial Scale 1kmSpatial Scale 1km

New Technologies

AVRIS Spectra

AVRIS Hyperspectral Cube

Airborne Visible/Infrared Airborne Visible/Infrared Imaging Spectrometer Imaging Spectrometer

224 spectral channels 224 spectral channels

400 – 2500 nm spectral 400 – 2500 nm spectral resolution, resolution,

20 meter ground 20 meter ground resolution.resolution.

Brine Shrimp pondBrine Shrimp pond

LidarLight Detection and Ranging

Visible portion of spectrumExcellent opportunities for vertical dimensions not for horizontal

Data from Lefsky et al