Contents
How many spectral bands are there in the Aster Data?
14 spectral bands
The ASTER instrument has 14 spectral bands, including three visible and near-infrared (VNIR) bands with a spatial resolution of 15 m, six short-wave-infrared (SWIR) bands with a spatial resolution of 30 m, and five thermal infrared (TIR) bands that have a spatial resolution of 90 m (Abrams, 2000).
Which band of Landsat 8 is used for moisture content detection between soil and vegetation?
Landsat 8 Operational Land Image (OLI) and Thermal Infrared Sensor (TIRS)
| Band | Wavelength | Useful for mapping |
|---|---|---|
| Band 10 – TIRS 1 | 10.60-11.19 | 100 meter resolution, thermal mapping and estimated soil moisture |
| Band 11 – TIRS 2 | 11.50-12.51 | 100 meter resolution, improved thermal mapping and estimated soil moisture |
What is the spatial resolution of ASTER?
ASTER Spatial Resolution The ASTER instruments acquire data in three native spatial resolutions: VNIR (Visible and Near-Infrared) Bands 1, 2, 3N, 3B1: 15 meter. SWIR (Shortwave Infrared) Bands 4–9: 30 meter. TIR (Thermal Infrared) Bands 10–14: 90 meter.
How are band ratios used to interpret Aster Data?
In the first step, false color composites, band ratios, and principal components analyses on visible and near infrared (VNIR) and shortwave infrared (SWIR) bands were chosen and interpreted on the basis of the field and petrographic knowledge of the lithologies in order to detect major lithological contacts and mineralized faults.
How are Aster Tir bands used in rock analysis?
The ASTER TIR bands were used to evaluate Reststrahlen and Christiansen effects in the granitoid rocks spectra, whereas VNIR/SWIR false color composite and ratio images were chosen directly on the basis of the granitoid spectra (derived from both spectrophotometric analyses of samples and selected sites in the ASTER image).
How is Aster Data used in mineral exploration?
USING ASTER IN MINERAL EXPLORATION The use of ASTER data in mineral prospecting has increased in recent years because its relatively low cost, broad coverage, and unique integral bands highly sensitive to alteration minerals (i.e. minerals known to surround target minerals).
Can you use Aster Data for igneous terrain?
However, it is not considered readily applicable to the mapping of metamorphic and igneous terrains, where lithological contacts are less predictable.