AIR-Spec 2.0 Plans for the July 2 2019 South Pacific Eclipse

The Airborne Infra-Red Spectrograph (AIR-Spec) will re-fly on the NCAR Gulf Stream V through the shadow of the July 2 2019 south pacific total solar eclipse. The goals of this re-flight are to obtain higher S/N observations and the first observations of a density sensitive line pair in the IR. Upgrades for the AIR-Spec instrument include: improvements to the IR camera design, improvements to the spectrograph dewer, a closed loop image stabilization and simplified operations. The draft observing plan will be described.

Our line list for 2019 is: S XI 1.39um; Si X 1.43um; S XI 1.92um; Fe IX 2.84um; Mg VIII 3.03um. In addition we will obtain additional information on an unknown emission line at 2.85um observed by AIR-Spec during the 2017 eclipse.