# Development of the User Requirements for the Canadian WildFireSat Satellite Mission
## 5 Conclusions  
In this study we provided an overview of the approach taken to understand Canadian wildfire management EO needs and transcribe User Requirements which can be used to develop a purpose-built wildfire monitoring satellite to meet their needs. The User Requirements presented here originate inthe requirements for CWFMS [49], which were refined through consultation of scientific (e.g., [51]) and wildfire management users to produce the User Requirements for the WFS mission. The translation of the Wildfire Management Needs into User Requirements for WFS is a foundational step in Phase-A of the mission (Figure 4). Through this process we developed qualitative FMFs based on operational wildfire management needs. Considering technical capabilities and limitations allows User Requirements to be defined for a non-specific space system to address the FMFs. When financial and scope considerations are applied to the User Requirements, the WFS Mission Requirements [50] can be specified. Ultimately, Phase-A of WFS culminates by extending the Mission Requirements into detailed technical specifications for the satellite in the System Requirements. As Figure 4 illustrates, although each stage of Phase-A becomes more technically specific, all of the System Requirements are traceable to their origins in wildfire management needs. Figure 4: Illustration of the process of defining satellite system requirements based on wildfire management needs in Phase-A of the WildFireSat mission. Fire Management Functionalities (FMFs) are defined qualitatively to capture the Wildfire Management Needs without consideration of space system capabilities or limitations. The FMFs are then translated into User Requirements, which take into consideration space system capabilities required to deliver the necessary data, but do not target any specific mission configuration or scenario. The Mission Requirements define a specific mission scope to address the User Requirements under a specific funding envelope. The Mission Requirements are then used to produce detailed System Requirements describing the technical design of the satellite system. At each level of refinement, the original source of each requirement can be traced back to the end-user’s needs thereby ensuring that the technical design of the satellite system is fundamentally driven by the Wildfire Management Needs. WildFireSat aims to deliver a purpose-built operational wildfire monitoring satellite to support wildfire managers as the primary users. To that end, despite the technical and scientific challenges of the mission, the key to operational success remains in the hands of the wildfire management community. In order to achieve meaningful impact in wildfire management operations, the end-user engagement described in this study must continue for the duration of the mission to ensure that wildfire management needs continue to be heard and that wildfire managers develop a sense of ownership in the mission. Conceptualization, J.M.J., T.J.L., H.v.M., D.D., M.J.W. ; analysis, J.M.J., N.J., L.N.P., B.L. ; investigation, J.M.J., C.M., N.J., A.S.C., D.J., D.D., D.K.T. ; data curation, C.M., R.R. ; writing--original draft preparation, J.M.J., N.J., C.M., L.M.J., M.S. ; writing--review and editing, all authors; supervision, J.M.J., H.v.M., T.J.L. ; project administration, J.M.J., D.J. All authors have read and agreed to the published version of the manuscript. The WildFireSat mission is a joint Canadian federal government mission led by the Canadian Space Agency. The space segment of the mission is funded by the Canadian Space Agency, while ground segment and user activities are supported by Natural Resources Canada and Environment and Climate Change Canada. Author contributions to this study have been provided through in-kind contribution on behalf of their affiliate agencies. [PERSON]'s contribution is supported by NERC NC funding to the National Centre for Earth Observation (NE/R016518/1).