## 6 Conclusions  
We proposed experimental instrumentation for SEE monitoring aiming to achieve in-depth analysis by enhancing the observability and synchronization of distinct types of measurements. For that, we discussed the adopted methodology and practical aspects beyond the available radiation testing strategies in the literature. The limitations and opportunities of our approach were discussed. We also presented further perspectives on the improvement and extension of the instrumentation for complex devices and systems. After carrying out two experimental campaigns in irradiation facilities, we validated our proposal and presented the main positive outcomes of using this approach in comparison with more traditional strategies. Notably, the solution provides enhanced synchronization, high sampling rate, fast response time, detailed resolution, and flexibility. Therefore, as part of this study, we were not only able to further investigate the SRAM memories used on-board the PROBA-V satellite and provide insights about their flight behavior and SEL sensitivity, but also propose robust instrumentation for the SEE monitoring of general electronic systems. In future work, integrating temperature control capabilities into the system will allow the exploration of other temperature ranges that can significantly affect the SEL response of the devices. Besides that, a feature that might support the experiment execution is a flexible interface ready for integration with the facility's beam shutter control, enabling fine timing adjustments, such as SEL events isolation. Finally, we also observed some behaviors that can be worthy of further investigation by using the proposed instrumentation (e.g., through a laser test campaign). \begin{table}
\begin{tabular}{c c l} \hline \hline
**Parameters** & **Value** & **Observations** \\ \hline Current resolution & 25 \(\mu\)A & - \\ Threshold current & up to 725 mA & Configurable in real-time \\ \hline Timing resolution & 80 ns & Current and memory errors synchronization \\ Current conversion & 140 \(\mu\)s & Analog to digital conversion \\ Current sampling & 220 \(\mu\)s & - \\ Response time 1  & 1.1 ms to 1.25 ms & From high current to SEL detection \\ \hline Test modes & - & Standby, chip-enabled, static, and dynamic 2  \\ Power monitoring & - & Main supply and IO banks monitored \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Summary of functional parameters of the instrumentation. **Author Contributions:** Conceptualization, A.M.P.M., D.A.S., L.M.L., V.G. and L.D. ; methodology, A.M.P.M., D.A.S., L.M.L., V.G. and L.D. ; software, D.A.S. and L.M.L. ; validation, A.M.P.M., D.A.S., L.M.L. and V.G. ; formal analysis, A.M.P.M., D.A.S. and L.M.L. ; investigation, A.M.P.M., D.A.S., L.M.L. and V.G. ; resources, V.G. and L.D. ; data curation, A.M.P.M., D.A.S. and L.M.L. ; writing--original draft preparation, A.M.P.M. and D.A.S. ; writing--review and editing, A.M.P.M., D.A.S., L.M.L., V.G. and L.D. ; visualization, A.M.P.M., D.A.S. and L.M.L. ; supervision, V.G. and L.D. ; project administration, V.G. and L.D. ; funding acquisition, V.G. and L.D. All authors have read and agreed to the published version of the manuscript. **Funding:** This study has received funding from the European Union's Horizon 2020 research and innovation programme (grant agreement no. 101008126), from an ESA contract (contract no. 4000134557/21/NL/KML/rk), and from the Region d'Occitanie and the Ecole Doctorale I2S from the University of Montpellier (contract no. 20007368/ALDOCT-000932). **Data Availability Statement:** The data presented in this study are available on reasonable request from the corresponding authors. **Acknowledgments:** The authors would like to acknowledge the support given by the irradiation facilities personnel: RADEF and PSI. Also, to the former PROBA-V project members, for the provided information and discussions, and ESA researchers, for the discussions and test samples with accordance to flight parts. **Conflicts of Interest:** The authors declare no conflicts of interest.