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Some Significant Current Projects
Landsat Multispectral
Scanner (MSS) and Landsat
Thematic Mapper (TM) Sensor System Characteristics
Components of the Landsat 4 and 5
Thematic Mapper
Reflectance of the Upper Surface of A Sycamore Leaf at Different Moisture Contents
GOES
GOES East and West Coverage
140ÞE 180ÞE 20ÞE
Useful GOES coverage
Communication range
GOES West
GOES East
140ÞW 100ÞW 60ÞW 20ÞW
GOES West
GOES East
GOES East and West Coverage
GOES East Infrared
August 25, 1989
Advanced Very High Resolution Radiometer (AVHRR) Bandwidths
Advanced Very High Resolution Radiometer
(AVHRR) Imagery
Advanced Very High Resolution Radiometer (AVHRR) Mosaic of the Conterminous United States
What is NDVI?The Normalized Difference Vegetation Index (NDVI)
has been in use for many years to measure and monitor plant growth (vigor), vegetation cover, and biomass
production from multispectral satellite data. The NDVI image maps shown here are prepared from 1-km
AVHRR spectral data in the visible (Channel 1; 0.58-0.68 micrometers) and near infrared (Channel 2; 0.725-1.10 micrometers) regions of the electromagnetic spectrum.
NDVI is calculated as follows:
NDVI = (Channel 2 - Channel 1) / (Channel 2 + Channel 1)
The principle behind NDVI is that Channel 1 is in the red-light region of the electromagnetic spectrum where chlorophyll causes considerable absorption of incoming sunlight, whereas Channel 2 is in the near-
infrared region of the spectrum where a plant's spongy mesophyll leaf structure creates considerable reflectance (Tucker 1979, Jackson et al.1983, Tucker et al. 1991). As a result, vigorously growing healthy vegetation has low red-light reflectance and high near-infrared reflectance, and hence, high NDVI values.
This relatively simply algorithm produces output values in the range of -1.0 to 1.0. Increasing positive NDVI values, shown in increasing shades of green on the images, indicate increasing amounts of green
vegetation. NDVI values near zero and decreasing negative values indicate non-vegetated features such as barren surfaces (rock and soil) and water, snow, ice, and clouds.
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Onboard Terra
Oahu, HI15 x 15 m (RGB
= 1,4,3)
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Onboard Terra
North ShoreOahu, HI
15 x 15 m (RGB= 1,4,3)
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Onboard Terra
Pearl Harbor, Hawaii, 15 x 15 m (RGB= 1,4,3)
Earth Observing System - Terra Instruments
ASTER - Advanced Spaceborne Thermal Emission and Reflection RadiometerCERES - Clouds and the Earth’s Radiant Energy SystemMISR - Multi-angle Imaging SpectroradiometerMODIS - Moderate-resolution Imaging SpectroradiometerMOPITT - Measurement of Pollution in the Troposphere
Discipline EOS-AM InstrumentsMeasurement
Atmosphere Cloud Properties MODIS, MISR, ASTERRadiative Energy Fluxes CERES, MODIS, MISRPrecipitationTropospheric Chemistry MOPITTStratospheric ChemistryAerosol Properties MISR, MODISAtmospheric Temperature MODISAtmospheric Humidity MODISLightning
Earth Observing System Measurements
Discipline EOS-AM InstrumentsMeasurement
Land Land Cover/Land Use Change MODIS, MISR, ASTERVegetation Dynamics MODIS, MISR, ASTERSurface Temperature MODIS, ASTERFire Occurrence MODIS, ASTERVolcanic Effects MODIS, MISR, ASTERSurface Wetness
Earth Observing System Measurements
Discipline EOS-AM InstrumentsMeasurement
Ocean Surface Temperature MODISPhytoplankton MODIS, MISRDissolved Organic Matter MODIS, MISRSurface Wind FieldsOcean Surface Topography
Cryosphere Land Ice Change ASTERSea Ice MODIS, ASTERSnow Cover MODIS, ASTER
Solar Radiation Total Solar RadiationUltraviolet Spectral Irradiance
Earth Observing System Measurements
Earth Observing System - Terra Instruments
MODIS - Moderate-resolution Imaging Spectroradiometer
Spectral Range 0.4 - 14.4 mmSpectral Coverage +55˚, 2330 km swathSpatial Resolution 250 m (2 bands), 500 m (5 bands), 1000 m (29 bands)
ASTER - Advanced Spaceborne Thermal Emission and Reflection Radiometer
Spectral Range VNIR 0.4 - 14.4 mm, SWIR 1.6 - 2.5 mm, TIR 8 - 12 mmSpatial Resolution 15 m (VNIR : 3 bands)
30 m (SWIR: 6 bands) 90 m (TIR: 5 bands)