Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Certifying Emergency Landing for Safe Urban UAV   Unmanned Aerial Vehicles (UAVs) have the potential to be used for many
applications in urban environments. However, allowing UAVs to fly above densely
populated areas raises concerns regarding safety. One of the main safety issues
is the possibility for a failure to cause the loss of navigation capabilities,
which can result in the UAV falling/landing in hazardous areas such as busy
roads, where it can cause fatal accidents. Current standards, such as the SORA
published in 2019, do not consider applicable mitigation techniques to handle
this kind of hazardous situations. Consequently, certifying UAV urban
operations implies to demonstrate very high levels of integrity, which results
in prohibitive development costs. To address this issue, this paper explores
the concept of Emergency Landing (EL). A safety analysis is conducted on an
urban UAV case study, and requirements are proposed to enable the integration
of EL as an acceptable mitigation mean in the SORA. Based on these
requirements, an EL implementation was developed, together with a runtime
monitoring architecture to enhance confidence in the system. Preliminary
qualitative results are presented and the monitor seem to be able to detect
errors of the EL system effectively.

18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga