Full Name IR spectrometer (CLARREO) Status No longer considered
Instrument Agencies NASA Maturity Medium Heritage
Instrument Type Earth radiation budget radiometers Geometry Nadir-viewing
Instrument Technology High-resolution nadir-scanning IR spectrometer Sampling Sounding
Data Access Open Access Data Format
Measurements and Applications Absolute spectrally-resolved measurements of terrestrial thermal emission with an absolute accuracy of 0.1 K in brightness temperature. The measurements cover most of the thermal spectrum.
Resolution Summary 1 cm-1; 100 km footprint
Swath Summary 100 km
[Max Swath: 100 km]
Accuracy Summary .1K 3σ brightness temperature
Waveband Summary 200 to 2000 cm-1
TIR (~6.0 µm - ~15.0 µm)
FIR (~15.0 µm - ~0.1 cm)
Instrument Measurements
Measurements Overview
Radiation budgetUpward long-wave irradiance at TOA
Upwelling (Outgoing) spectral radiance at TOA
Thematic Links Global Climate Observing System Essential Climate Variables (GCOS ECVs)
ECVDescriptionProduct(s)ECV Inventory 3.0 Record(s)
Earth Radiation Budget click here click here search ECV Inventory records
Instrument Missions
CLARREO-1 - Climate Absolute Radiance and Refractivity Observatory (2017 - 2020)
CLARREO-3 - Climate Absolute Radiance and Refractivity Observatory (2020 - 2023)