01462nas a2200133   4500008004100000245007900041210006900120520090800189100002101097700002201118700002401140700002701164856013701191       2020                        eng d00aTime Difference of Arrival Localization Study for SAR Systems over LoRaWAN0 aTime Difference of Arrival Localization Study for SAR Systems ov3 aOver the last years we have seen a rapid expansion within the area of Internet of Things (IoT) applications. For many applications’ use cases, such as rescue monitor systems, the problem of localization (i.e. determine the physical location of nodes) is critical. This paper studies and evaluates the usage of mathematical model of multilateration algorithms using Time Difference of Arrival (TDoA) as a solution for positioning over Long Range Wide Area Network (LoRaWAN). The research is carried out using simulations in Python by configuring the constant positions of the Gateways inside an outdoor area. The proposed algorithms can be integrated in application for tracking people at any time and especially routing people from vulnerable groups. Through multilateration and algorithm’s prediction, we can have an accuracy of 40-60m in location positioning ideal for search and rescue use cases.1 aBouras, Christos1 aGkamas, Apostolos1 aKokkinos, Vasileios1 aPapachristos, Nikolaos  uhttp://telematics.upatras.gr/telematics/publications/time-difference-arrival-localization-study-sar-systems-over-lorawan?language=el