Bill Doncaster’s scientific contributions

... Space Situational Awareness (SSA) is becoming a central topic in the last years due to increasing space traffic [1]. Fundamental to SSA, the knowledge of the object's position uncertainty is made available only in some cases, e.g., when the US space command releases collision alerts, the satellite has a GNSS system, or the object is tracked by the International Laser Ranging Service [2]. ...

Reference:

Two-line-element propagation improvement and uncertainty estimation using recurrent neural networks

... Small satellite space missions are an important asset and their relevance is increasing in recent years, not only for educational purposes, but also as technological demonstrators, and for realizing constellations of a huge number of nanosatellites for communication and internet providers (Williams et al., 2018;Lal et al., 2017;Panga et al., 2016). This kind of missions would greatly benefit from the use of commercial components. ...

Reference:

Radiation testing of a commercial 6-axis MEMS inertial navigation unit at ENEA Frascati proton linear accelerator

... Furthermore, the forecast estimated a significant increase in the launch rate for small satellites (from 1 kg up to 100 kg) [7]. Specifically, Bryce Tech [8] states that 2,013 small commercial satellites were launched between 2011 and 2020, of which 609 were for EO commercial purposes. Figure 1b shows that smallsats are experiencing a remarkable growth in the next decade, just as Low-Cost Carriers (LCCs) did in the late 2000s and early 2010s, a decade after their appearance in the late-1990s/early-2000s (Fig. 1a). ...

Reference:

Strategic similarities between earth observation small satellite constellations in very low earth orbit and low-cost carriers by means of strategy canvas