Thermal infrared spectroscopy
measures thermal radiation emitted from materials and surfaces and is used to determine the type of bonds present in a sample as well as their lattice environment.
Thermal infrared spectroscopy (TIR spectroscopy) is the subset of infrared spectroscopy that deals with radiation emitted in the infrared part of the electromagnetic spectrum. The emitted infrared radiation, though similar to blackbody radiation, is different in that the radiation is banded at characteristic vibrations in the material. The method measures the thermal infrared radiation emitted (as opposed to being transmitted or reflected) from a volume or surface. This method is commonly used to identify the composition of surface by analyzing its spectrum and comparing it to previously measured materials. It is particularly suited to airborne and spaceborne applications.
Thermal infrared spectrometers
Airborne
HyTES: the Hyperspectral Thermal Emission Spectrometer operated by JPL and flown on a Twin Otter or ER2 aircraft
TIMS: the Thermal Infrared Multispectral Scanner, a multispectral radiometer flown on C-130, ER-2, and the Stennis Learjet aircraft.
SEBASS: a hyperspectral sensor developed and operated by The Aerospace Corporation.
Hyper-Cam: a hyperspectral thermal infrared camera developed by Telops.
OWL: a hyperspectral thermal infrared camera developed by Specim.
Spaceborne
ISM: An imaging spectrometer on board the Soviet Phobos 2 spacecraft.
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