EO1 - Hyperion
Earth Observing-1 (EO-1) is the first satellite in NASA's New Millennium Program Earth Observing series. EO-1 was launched on 21 November 2000 . The Hyperion instrument provides a new class of Earth observation data for improved Earth surface characterization. EO – 1 had both a standart 9 band sensor (ALI) and a 220 band hyperspectral sensor (Hyperion).
The Hyperion provides a high resolution hyperspectral imager capable of resolving 220 spectral bands (from 0.4 to 2.5 µm) with a 30 meter spatial resolution. Each resulting image is 7.5 by 100 km in ground coverage; resolution is 30 meters.
The Hyperion sensor collects continuous data in the visible / near-infrared (VNIR, 380 to 1000 nm) and the short wave infrared (SWIR, 900 to 2500 nm) portions of the spectrum using two spectrometers.
Hyperspectral imaging has wide ranging applications in mining, geology, forestry, agriculture, and environmental management. Detailed classification of land assets through the Hyperion will enable more accurate remote mineral exploration, better predictions of crop yield, and assessments, and better containment mapping.
Hyperion image includes a 7.5 km x 100 km strip and records the reflection value corresponding to 220 spectral bands in the area.
Because of that Hyperion data contain 400-2500 nm spectral range, it could be qualified that it has continuous spectral range. Because of this, it is used in lithology and unit discrimination.
| Spatial Resolution | 30 m |
|---|---|
| Swath Width | 7.75 km |
| Spectral Channels | 220 bands, VNIR (70 channel, 356 nm - 1058 nm), SWIR (172 channel, 852 nm - 2577 nm) |
| Spectral Bandwidth | 10 nm (nominal) |
| Digitization | 12 bit |
| Signal-to-Noise Ratio (SNR) | 161 (550 nm); 147 (700 nm); 110 (1125 nm); 40 (2125 nm) |