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Lessons learnt on the use of grease lubricants for applications in space mechanisms confirm their high chemical stability on long-term storage (LTS), due to intrinsic inertness of their fluorocarbon-based components which could be affected only via catalytic effect of metal compounds. What is observed even in widely used space-qualified greases is physical delamination leading to separation of the base oil and the solid filler. This delamination affects the lubricant?s viscosity and dielectric properties.

Future high frequency interferometric antennas (e.g. at Ka band) using large baselines require verification and testing with a very high accuracy, in particular in phase. While such interferometric testing and ground calibration techniques have been successfully performed in the past (i.e.

In time scales of minutes the solar subflares and gamma ray bursts, like GRB221009A, can respectively release, small but close and huge but very far away amounts of electromagnetic energy, in Extreme Ultraviolet (EUV), X-ray and γ- ray, among other bands. However the availability of conventional astronomical sensors for these bands, for instance in EUV, fundamental to characterize the habitability zone of exoplanets in hosting stars, is presently very limited or just non existing.

OBSW development takes into account multiple design constraints linked with typical real-time SW development such as reliability, determinism and performance on constrained HW. Such constraints are often at odds with each other. For example, determinism encourages static memory and ressource allocation, but optimal performance requires dynamic exploitation of these same resources. Current reference OBSW practices have managed to capture an acceptable tradeoff between those (often) conflicting constraints.

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