Remote Sensing

Red wavelength & Benefits
650 nm (Band 3 on TM)
Vegetation discrimination
Soil and geological boundaries
More 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 waterbodies
Analysis of land-use, soil, and vegetation
Atmoshperic Scattering < 450 nm
MODIS Specs
Cost: Free
36 bands
Red/NIR bands 250m res
Other bands 500 m res
1-2 day temporal
Only Available after 2000
10 km Swath
Landsat ETM Specs
Cost: $500 or cheaper
R, G, B, NIR, 2x MidIR, Thermal IR
30 m Res, 120m for Thermal
15 m for Pan
16 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 plants
Discriminates cloud, snow, ice
2080-2350 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 surfaces
Useful for geothermal, thermal inertia, vegetation classification, veg. stress, & soil moisture
ASTER Specs
Cost: $50-80
Bands 1-4 15 m
Bands 5-10 30m
Bands 11-15 90 m
Available after 2000
60 km Swath
Low Cost Sattelites
MODIS – FREE
ASTER – $50-80
AVHRR – FREE
Landsat – $500 w/ discounts
Expesnive Satelittes ($3k-5k)
Iknonos
Quickbird
Spot
Landsat MSS
Bands: Green, Red, 2x NIR
Temporal: 16-18 days
Spatial: 79 m
Ikonos Specs
Since Sept 1999
.82 m Pan
3.2 m Multi Rgb, NIR
11km x 11km Swath
Temporal: 3-5 day off nadir; 144 day nadir
Quickbird Specs
Swath: 16.5 km x 16.5 km
Bands: Pan, R, G, B, NIR
Res: 2.44 MS, 61cm Pan
Temproal 1-3.5 days