Remote Sensing

Red wavelength & Benefits
650 nm (Band 3 on TM)Vegetation discriminationSoil and geological boundariesMore contrast than G & B due to less effect from atmosh, attenutation
Green Wavelength & Benefits
510 nm (Band 2 on TM)Reacts to Green relectance of Healthy vegetation
Blue Wavelength & Benefits
475 nm (Band 1 on TM)Penetration of waterbodiesAnalysis of land-use, soil, and vegetationAtmoshperic Scattering < 450 nm
MODIS Specs
Cost: Free36 bandsRed/NIR bands 250m resOther bands 500 m res1-2 day temporalOnly Available after 200010 km Swath
Landsat ETM Specs
Cost: $500 or cheaperR, G, B, NIR, 2x MidIR, Thermal IR30 m Res, 120m for Thermal15 m for Pan16 day temporal
NIR wavelength & Benefits
760-900 nm (band 4 on TM)Responsive to Biomass, crop ID, and emphasizes soil/crop and land/water contrasts
Mid-IR wavelength & Benefits
1550-1750 nm (band 5 on TM)Resonsive to amt of water in plantsDiscriminates cloud, snow, ice2080-2350 nm Discriminates geologic formations(ie, hydrothermal)
Thermal IR wavelength and Benefits
10.4-12.5 microns (band 6 on TM)measures amt of radiant energy emitted from surfacesUseful for geothermal, thermal inertia, vegetation classification, veg. stress, & soil moisture
ASTER Specs
Cost: $50-80Bands 1-4 15 mBands 5-10 30mBands 11-15 90 mAvailable after 200060 km Swath
Low Cost Sattelites
MODIS – FREEASTER – $50-80AVHRR – FREELandsat – $500 w/ discounts
Expesnive Satelittes ($3k-5k)
IknonosQuickbirdSpot
Landsat MSS
Bands: Green, Red, 2x NIRTemporal: 16-18 daysSpatial: 79 m
Ikonos Specs
Since Sept 1999.82 m Pan3.2 m Multi Rgb, NIR11km x 11km SwathTemporal: 3-5 day off nadir; 144 day nadir
Quickbird Specs
Swath: 16.5 km x 16.5 kmBands: Pan, R, G, B, NIRRes: 2.44 MS, 61cm PanTemproal 1-3.5 days