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These images are in &amp;quot;.tiff&amp;quot; format and they are spatially calibrated using the known star background and projected into uniform geographical grid, corresponding to a 180 x 144 km region around 87 km, the peak OH emission height. The AMTM operates during the winter months and is programmed to capture OH (3,1) airglow images daily when the solar zenith angle exceeds 98 degrees.
Data collection: 
Details of the instrument, design, operation, and data validation for the AMTM can be found in "Pautet, P-D., Taylor, Michael J., Pendleton, W.R., Zhao, Yucheng, Yuan, Tao, Esplin, R., &amp; McLain, D. (2014). Advanced mesospheric temperature mapper for high-latitude airglow studies. Applied Optics, 53 (26), 5934-5943. https://doi.org/10.1364/AO.53.005934".
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