Speaker
Description
The Advanced Sea and Land Surface Temperature Radiometer (ASLSTR) represents the next-generation successor to the SLSTR instrument flying on Sentinel-3 missions, with enhanced performance requirements in terms of radiometric accuracy and lower detector operating temperatures. Achieving these objectives requires a robust thermal design supported by thermal modelling and iterative system-level analysis. The preliminary design phase has highlighted a complex balance between demanding detector temperature requirements, calibration stability needs, and constraints imposed by the evolving instrument configuration. Compared with the previous generation, the new instrument accommodation leads to a different exposure to external environmental heat fluxes, placing additional emphasis on instrument-level radiative shielding. Particular attention is given to the optical bench assembly, composed of two optical benches, with emphasis on the section accommodating the TIR detectors, which represents one of the main thermal design drivers at instrument level. The contribution will present the thermal modelling activity, focusing on the thermal challenges emerging from the ongoing architecture definition.