title: Advanced mesospheric temperature mapper for high-latitude airglow studies.
abstract: Over the past 60 years, ground-based remote sensing measurements of the Earth's mesospheric temperature have been performed using the nighttime hydroxyl (OH) emission, which originates at an altitude of ∼87  km. Several types of instruments have been employed to date: spectrometers, Fabry-Perot or Michelson interferometers, scanning-radiometers, and more recently temperature mappers. Most of them measure the mesospheric temperature in a few sample directions and/or with a limited temporal resolution, restricting their research capabilities to the investigation of larger-scale perturbations such as inertial waves, tides, or planetary waves. The Advanced Mesospheric Temperature Mapper (AMTM) is a novel infrared digital imaging system that measures selected emission lines in the mesospheric OH (3,1) band (at ∼1.5  μm) to create intensity and temperature maps of the mesosphere around 87 km. The data are obtained with an unprecedented spatial (∼0.5  km) and temporal (typically 30″) resolution over a large 120° field of view, allowing detailed measurements of wave propagation and dissipation at the ∼87  km level, even in the presence of strong aurora or under full moon conditions. This paper describes the AMTM characteristics, compares measured temperatures with values obtained by a collocated Na lidar instrument, and presents several examples of temperature maps and nightly keogram representations to illustrate the excellent capabilities of this new instrument.
authors.forename: P-D
authors.initials: PD
authors.lastname: Pautet
authors.forename: M J
authors.initials: MJ
authors.lastname: Taylor
authors.forename: W R
authors.initials: WR
authors.lastname: Pendleton
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: T
authors.initials: T
authors.lastname: Yuan
authors.forename: R
authors.initials: R
authors.lastname: Esplin
authors.forename: D
authors.initials: D
authors.lastname: McLain