Earth observing satellites are responsible for a variety of essential operations, including communication, navigation, and scientific observation. In the harsh environment of space, however, on-orbit sensor degradation can cause inaccuracies over time. Using the Moon as a reference source, we can achieve reliable in-situ satellite calibration to address this. The objective of the airborne lunar spectral irradiance (air-LUSI) mission is to improve the value of the Moon in this regard, extending the accuracy of existing lunar models and observations through its establishment of an in-situ, SI-traceable, absolute calibration target. A non-imaging telescope is flown at 70,000 ft aboard an ER-2 aircraft, circumventing a significant fraction of lunar spectra measurement uncertainties due to Earth’s atmosphere. The improvement in these measurements is projected to improve the widely accepted ROLO (GIRO) model such that it achieves absolute uncertainties of less than 1%. Due to erratic motion of the aircraft, a robotic telescope mount is deployed to stabilize the telescope along its line-of-sight, minimizing data loss. This paper discusses the development and in-lab performance of the tracking system for this instrument, referred to as the high-altitude aircraft-mounted robotic telescope mount (HAAMR). An overview of the robotic system is provided, and a static loading analysis is conducted to demonstrate airworthiness. This instrument was designed to be an improvement upon the ARTEMIS subsystem of the same purpose, for the series of flight campaigns from December 2024 to December 2025. The analysis demonstrates, from past flight data, that the tracking accuracy of the HAAMR will guarantee high pointing accuracy during turbulent flight.