Metadata:
The CPC Ecuador Spatial Database contains 3 ASTER scenes over three different locations along one orbital path. The scenes were all collected on the same date: 15 September 2003. General metadata is below, containing information relevant to each scene. Specific metadata follows, containing the details for each individual scene.
General Metadata:
- Abstract:
- ASTER multispectral data are similar to Landsat ETM imagery, but the data have a higher spectral resolution and varying spatial resolutions. The sensor resides on the Terra platform, which was launched in December 1999 as part of NASA’s Earth Observing System (EOS) project. Each image contains seven spectral bands. The first three spectral bands correspond to the Blue, Green, and Red portions of the electromagnetic (EM) spectrum. Bands 4, 5 and 7 correspond to different portions of the Near Infrared region of the EM spectrum. Band 6 corresponds to the Thermal Infrared portion of the EM spectrum.
- Source:
- All scenes were acquired from NASA’s Earth Observing System (EOS), with the exception of two scenes acquired from CLIRSEN (Centro de Levantamientos Integrados de Recursos Naturales por Sensores Remotos) in Ecuador.
- Spatial Resolution:
- VNIR – Visible and Near-Infrared Bands (1-3): 15 meters
SWIR – Shortwave Infrared Bands (4-9): 30 meters
TIR – Thermal Infrared Bands (10-14): 90 meters - Spectral Bandwidth (μm):
- VNIR Band 1: 0.52 – 0.60
VNIR Band 2: 0.63 – 0.69
VNIR Band 3N: 0.78 – 0.86*
VNIR Band 3B: 0.78 – 0.86*
SWIR Band 4: 1.600 – 1.700
SWIR Band 5: 2.145 – 2.185
SWIR Band 6: 2.185 – 2.225
SWIR Band 7: 2.235 – 2.285
SWIR Band 8: 2.295 – 2.365
SWIR Band 9: 2.360 – 2.430
TIR Band 10: 8.125 – 8.475
TIR Band 11: 8.475 – 8.825
TIR Band 12: 8.925 – 9.275
TIR Band 13: 10.25 – 10.95
TIR Band 14: 10.95 – 11.65
* Band 3N is nadir-looking. Band 3B is backward looking at an angle of 27.6 degrees off-nadir. - Radiometric Resolution:
- VNIR & SWIR Bands (1-9): 8 bit
TIR Bands (10-14): 12 bit - Temporal Resolution:
- Overpass Return Cycle: 16 days
- Horizontal Accuracy:
- Images that have been geo-rectified all have a horizontal accuracy of ±15 meters. Those images that have not been rectified have no quantifiable horizontal accuracy.
Specific Metadata:
| Image | Date | Lat. Center (dec. deg.) | Long. Center (dec. deg.) | Area (sq. km) |
| 1 | 20030915 | -0.02 | -76.84 | |
| 2 | 20030915 | -0.55 | -76.95 | |
| 3 | 20030915 | -1.09 | -77.06 |