![]() ![]() LEO satellites possess desirable attributes for navigation. Besides LEO satellite signals, other SOPs include AM/FM radio, digital television, WiFi, and cellular, with the latter showing the promise of a submeter-accurate navigation on unmanned aerial vehicles (UAVs) and meter-level navigation on ground vehicles. Opportunistic navigation is a paradigm that relies on exploiting ambient radio signal of opportunity (SOPs) for positioning and timing. To address the limitations and vulnerabilities of GNSS, opportunistic navigation has received significant attention over the past decade or so. This article studies opportunistic navigation with the Starlink megaconstellation of LEO satellites. Moreover, if the aforementioned companies agree to that additional cost, there will be no guarantees that they would not charge for “extra navigation services.” As such, exploiting LEO satellite signals opportunistically for navigation becomes the more viable approach. However, they require significant investment in satellite infrastructure and spectrum allocation, the cost of which private companies such as OneWeb, SpaceX, Amazon, among others which are planning to aggregately launch tens of thousands of satellites into LEO (see Figure 1 and Table 1) may not be willing to pay. The former studies allow for simpler receiver architectures and navigation algorithms. While some studies call for tailoring the transmission protocol to support navigation capabilities, other studies propose to exploit the transmitted signals for navigation in an opportunistic fashion. The promise of utilizing LEO satellites for navigation has been the subject of recent studies –. Figure 1: Some existing and future LEO satellite constellations. Major technology giants such as SpaceX, Amazon and OneWeb rush to enter this field by launching and scheduling the launch of thousands of satellites for Internet connectivity and communication purposes. ![]() With the recent developments in satellite technology, reduction in launch costs and commercialization of LEO megaconstellations, LEO satellites’ popularity is soaring. Many corporations, such as Orbcomm, Globalstar, and Iridium, made haste in securing their position in space as LEO constellations were born. T h e ambitious and glorified image of an Earth connected through a web woven from low-Earth orbit (LEO) satellites is taking the world by storm, promising high-resolution images remote sensing and global, high-availability, high-bandwidth and low-latency Internet. AUTONOMOUS SYSTEMS PERCEPTION, INTELLIGENCE AND NAVIGATION (ASPIN) LABORATORY ![]()
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