Fine-guidance sensor image simulation and pointing performance assessment for the CubeSpec mission

Le résumé fourni par la source

CubeSpec is a 12U CubeSat scheduled for launch in 2027 as an in-orbit demonstrator for high-resolution astrophysical spectroscopy. With a pointing stability expected to be around 1 arcmin, its excellent attitude determination and control system (ADCS) remains to ensure the targets remain focussed in the 2.5 x 6.5 arcsec entrance slit of the spectrograph. CubeSpec therefore incorporates a secondary pointing subsystem, the High Precision Pointing Platform (HPPP), which employs a closed-loop tip–tilt mirror coupled with a dedicated fine-guidance sensor (FGS). Accurate modelling of the FGS response is essential for predicting the achievable pointing performance. In this paper, we present an image-simulation tool developed for the FGS, together with a performance assessment of the HPPP. The analysis combines simulated sensor data with hardware test results obtained at both the ADCS and HPPP levels, providing an end-to-end evaluation of the system’s expected on-orbit behaviour.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.