ALI Instrument

Measurements and Applications

Measurement of Earth surface reflectance. Will validate new technologies contributing to cost reduction and increased capabilities for future missions. ALI comprises a wide field telescope and multispectral and panchromatic instrument.

Instrument Summary

Full Name
Advanced Land Imager
Status
No longer operational
Instrument Agencies
Maturity
Instrument Type
High resolution optical imagers
Geometry
Push-broom scanning
Instrument Technology
High resolution optical imager
Sampling
Imaging
Data Access
Open Access
Data Format
HDF or GeoTIFF

Performance Summary

Resolution
PAN: 10 m, VNIR and SWIR: 30 m
[Best Resolution: 10m]
Swath
185 km
[Max Swath: 185 km]
Accuracy
SNR @ 5% surf refl Pan:220, Multi 1: 215, Multi 2: 280, Multi 3: 290, Multi 4:240, Multi 4':190, Multi 5':130, Multi 5:175, Multi 7:170 (prototype instrument exceeds ETM+ SNR by a factor of 4 - 8)
Waveband
10 bands: VIS and NIR: 0.480 - 0.690 µm, 0.433 - 0.453 µm, 0.450 - 0.515 µm, 0.525 - 0.605 µm, 0.630 - 0.690 µm, 0.775 - 0.805 µm, 0.845 - 0.890 µm, 1.200 - 1.300 µm, SWIR: 1.550 - 1.750 µm, 2.080 - 2.350 µm
VIS (~0.40 µm - ~0.75 µm)
NIR (~0.75 µm - ~1.3 µm)
SWIR (~1.3 µm - ~3.0 µm)

Instrument Missions

NMP EO-1 - New Millenium Program Earth Observing-1 (2000 - 2017)

Instrument Measurements