THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - CO2 and O2 LIDAR (ASCENDS) -
Full Name Combined CO2 and O2 column absorption LIDAR (ASCENDS) Status Proposed
Instrument Agencies NASA Maturity Low Heritage
Instrument Type Lidars Geometry Nadir-viewing
Instrument Technology Atmospheric lidar Sampling Other
Data Access Open Access Data Format
Measurements and Applications Measure the number density of Carbon Dioxide (CO2) in the column. Measure length of the column using a laser altimeter and measure ambient air pressure and temperature.
Resolution Summary
Swath Summary 200 m
Accuracy Summary 1 ppm CO2; 2 K for temperature
Waveband Summary 1.57 µm
SWIR (~1.3 µm - ~3.0 µm)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Temperature FieldsAtmospheric temperature (column/profile) 
Trace gases (excluding ozone)Atmospheric Chemistry - CO2 (LT, HT, TC)1 [ppm]
Instrument Missions
ASCENDS - Active Sensing of CO2 Emissions over Nights, Days, and Seasons (2022 - 2025)
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