THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - HiRDLS -
Full Name High Resolution Dynamics Limb Sounder Status Operational
Instrument Agencies NASA, UKSA Maturity
Instrument Type Atmospheric chemistry Geometry Limb-scanning
Instrument Technology Limb-scanning IR spectrometer Sampling Sounding
Data Access Open Access Data Format HDF
Measurements and Applications Measures atmospheric temperature, concentrations of ozone, water vapour, methane, NOx, N2O, CFCs and other minor species, aerosol concentration, location of polar stratospheric clouds and cloud tops. Currently not collecting data on Aqua.
Resolution Summary Vertical: 1 km, Horizontal: 10 km
Swath Summary
Accuracy Summary Trace gas: 10%, Temperature: 1 K, Ozone: 10%
Waveband Summary TIR: 6.12 - 17.76 µm (21 channels)
TIR (~6.0 µm - ~15.0 µm)
FIR (~15.0 µm - ~0.1 cm)
Instrument Measurements
CategoryParameterAccuracy
AerosolsAerosol Extinction / Backscatter (column/profile) 
Aerosol optical depth (column/profile) 
Aerosol absorption optical depth (column/profile) 
Atmospheric Humidity FieldsAtmospheric specific humidity (HT, LS, HS&M) 
Atmospheric Temperature FieldsAtmospheric temperature (HT, LS, HS&M) 
Cloud type, amount and cloud top temperatureCloud top height 
OzoneOzone profile 
Trace gases (excluding ozone)Atmospheric Chemistry - CH4 (HT, LS, HS&M)1 [%]
Atmospheric Chemistry - CFC-11 (HT, LS, HS&M) 
Atmospheric Chemistry - CFC-12 (HT, LS, HS&M) 
Atmospheric Chemistry - NO2 (HT, LS, HS&M) 
Atmospheric Chemistry - N2O (HT, LS, HS&M) 
Atmospheric Chemistry - HNO3 (HT, LS, HS&M) 
Atmospheric Chemistry - ClONO2 (LS, HS&M) 
Atmospheric Chemistry - N2O5 (HT, LS, HS&M) 
Instrument Missions
Aqua - Aqua (formerly EOS PM-1) (2002 - 2019)
Aura - Aura (formerly EOS Chemistry) (2004 - 2019)
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