THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - ATLAS -
Full Name Advanced Topographic Laser Altimeter System Status Being developed
Instrument Agencies NASA Maturity
Instrument Type Lidars Geometry Nadir-viewing
Instrument Technology Lidar altimeter Sampling Imaging
Data Access Open Access Data Format
Measurements and Applications Provide date on ice sheet height and sea ice thickness, land altitude, aerosol height distributions, cloud height and boundary layer height.
Resolution Summary 66 m spots separated by 170 m
[Best Resolution: 66m]
Swath Summary
Accuracy Summary Aerosol profile: 20%, Ice elevation: 20 cm, Cloud top height: 75 m, Land elevation: 20 cm, geoid: 5 m
Waveband Summary VIS-NIR: Laser emits at 1064 nm (for altimetry) and 532 nm (for atmospheric measurements)
VIS (~0.40 µm - ~0.75 µm)
Instrument Measurements
CategoryParameterAccuracy
AerosolsAerosol Extinction / Backscatter (column/profile) 
Cloud particle properties and profileCloud optical depth 
Cloud type, amount and cloud top temperatureCloud type 
Ice sheet topographyIce sheet topography 
Landscape topographyLand surface topography 
Sea ice cover, edge and thicknessSea-ice thickness 
Instrument Missions
ICESat-II - Ice, Cloud, and Land Elevation Satellite II (2017 - 2020)
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