## 5 Conclusions
The entire SAR data processing procedure required twelve hours of computing time, exploiting up to 448 cores of the IT platform of the infrastructure and allowing us to generate 16 SLCs with 75 cm \(\times\) 27 cm (range \(\times\) azimuth) resolution and the final DEM of the island, with 2 m \(\times\) 2 m (range \(\times\) azimuth) resolution and a height error with a standard deviation on the order of 1.5 m. The complete budget for response time also includes the time required to install the system on board an aircraft and the time required to complete the entire acquisition campaign, which, for the case at hand, consisted of two flight missions for a total of about 10 h. According to the presentedanalysis, we can safely conclude that the IREA-CNR airborne SAR infrastructure already represents a valuable tool for the periodic monitoring of selected areas. As for the capability of the infrastructure to be operative during crisis events, according to the presented analysis, which does not account for downtime and the actual availability of dedicated manpower, we can reasonably estimate, for the presented case study, a response time on the order of a couple of days. Finally, it is underlined that although the presented analysis is relevant to a specific case study represented by the monitoring of a volcanic area, it provides indications for the general capacity of the infrastructure to provide a rapid response to a wide variety of extreme sudden events, such as floods, earthquakes and so on. Conceptualization, C.E., A.N., R.L., P.B. and S.P. ; methodology, software and validation, C.E., A.N., R.L., P.B. and S.P. ; investigation, C.E., A.N., R.L., P.B. and S.P. ; data curation, C.E., A.N., P.B. and S.P. ; writing--original draft preparation, C.E. and S.P. ; supervision, S.P. All authors have read and agreed to the published version of the manuscript. This work was supported, in part, by the Italian Department of Civil Protection (DPC) within the framework of the DPC-IREA Agreement (2022-2024), although it does not necessarily represent official DPC opinion and policies. This research was also partially funded by the EU Project--Next Generation EU Mission 4 \"Education and Research\"--Component 2: \"From research to business\"--Investment 3.1: \"Fund for the realisation of an integrated system of research and innovation infrastructures\"--ITINERIS--Italian Integrated Environmental Research Infrastructures System and in part in the GRINT (PIR01_00013) project funded by the Italian Ministry for Universities and Research (MUR). Restrictions apply to the datasets exploited for this article. Data acquisition has been indeed carried out in the frame of funded projects: the datasets are thus subject to the restrictions imposed by non disclosure agreements signed with the partners. We thank [PERSON] and [PERSON] of IREA-CNR, [PERSON], [PERSON] and [PERSON] of the Italian Department of Civil Protection, and [PERSON] of Elettra Microwave for their continuous support. We also thank the anonymous reviewers and the editors for their constructive comments. The authors declare no conflicts of interest. The funders had no role in the design of the study; in the collection, analyses or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.