Airborne limb-imaging measurements of temperature, HNO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;, O&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;, ClONO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;, H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O and CFC-12 during the Arctic winter 2015/16: characterization, in-situ validation and comparison to Aura/MLS