New Celestial Navigation System for Drones Enables GPS-Free Operations: Report
A new celestial navigation system developed by scientists at the University of South Australia (UniSA) is expected to enhance drone operations by enabling uncrewed aerial vehicles (UAVs) to navigate using stars. This innovative method, designed to eliminate reliance on GPS signals, could make drones harder to detect and immune to jamming attacks, according to reports. The research was published in the journal Drones and is being hailed as a step forward in providing resilient, cost-effective navigation systems.
Design and Functionality of the System
The navigation system integrates visual observations of stars with conventional autopilot technology, making it lightweight and affordable for smaller drones. Samuel Teague, a researcher at UniSA, explained to Space.com that the new system is more compact and simpler than traditional star-based navigation setups. These traditional systems, often bulky and expensive, have primarily been used in spacecraft and large aircraft.
Testing of the system on a fixed-wing UAV reportedly demonstrated its ability to determine location with a precision of up to 2.5 miles (4 kilometres). Such accuracy is particularly significant in environments where GPS signals are disrupted, as often occurs during electronic warfare.
Potential Applications in Defence and Civil Sectors
The system’s ability to function independently of external signals has drawn attention for both military and civilian applications. Javaan Chahl, a UniSA scientist, stated in Space.com that it could support environmental monitoring in remote areas, as well as long-duration surveillance missions in GPS-compromised regions.
The development comes amidst growing concerns about the vulnerability of drones to GPS jamming, a tactic widely reported to have been employed during the Ukraine conflict. By using celestial navigation, drones could evade detection and interception, raising implications for both offensive and defensive military strategies.
This innovation is expected to bolster the evolving role of drones in modern warfare and civilian operations, offering an alternative navigation method that enhances resilience and versatility.
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Bronze statues, including depictions of snakes and a child priest, have been uncovered from a hot spring at San Casciano dei Bagni in Italy, according to the Italian Ministry of Culture, as per reports. The site, located around 120 kilometres northwest of Rome, has been excavated since 2019 and is believed to have been used for sacred rituals dating back to the third century B.C. The spring, originally used by the Etruscans and later adopted by the Romans, was a place where votive offerings were made in hopes of divine protection or healing, as per reports.
Discovery of Snake Statues and Other Artefacts
Bronze snake statues, some measuring up to 90 centimetres in length, were among the latest findings during the 2024 excavation, as reported by the excavation team. These statues were discovered in the deeper layers of the spring and are thought to have symbolised protection for the sacred waters. Other artefacts include a nude male figure inscribed with the name “Gaius Roscius” and a child priest holding a ball, which may have been used in divination rituals.
Preserved Organic Remains Found
The excavation also revealed well-preserved organic remains, such as eggs with visible yolks, pine cones, and plant matter. According to the Italian Ministry of Culture, in a statement, these items may have been used in rituals symbolising rebirth and regeneration. The preservation of these items is attributed to their rapid burial in sediment.
Expert Perspective
Alexandra Carpino, an art history professor at Northern Arizona University, commented in an email to Live Science that these findings are among the most significant discoveries of the 21st century. The range of artefacts provides insights into the role of healing sanctuaries in ancient societies.
Ongoing Research at the Site
Research continues at San Casciano dei Bagni, with scholars examining the inscriptions and artefacts to uncover more about the Etruscan and Roman use of the spring.
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A new pulsar, PSR J1922+37, has been discovered with a spin period of 1.92 seconds using the Five-hundred-metre Aperture Spherical Radio Telescope (FAST) in China, according to a report. The finding was made in the direction of the open cluster NGC 6791. If confirmed as a member of this cluster, it would be the first pulsar identified in an open cluster, a breakthrough in pulsar and stellar cluster research, according to sources.
Key Details of PSR J1922+37
The finding was reported in a paper published Dec. 11 on the arXiv preprint server. As per reports, the pulsar PSR J1922+37 has been observed with a dispersion measure of 85 pc/cm³ and a flux density of approximately 7.0 µJy. Its position aligns closely with the location of NGC 6791, with an offset of 14 arcminutes from the cluster’s centre. The estimated distance of the pulsar, 15,600 light-years, is consistent with the cluster’s distance range, which is calculated to be between 13,100 and 16,000 light-years.
According to the study, led by Xiao-Jin Liu of Beijing Normal University, the dense stellar environment of NGC 6791 increases the likelihood of pulsars being present within the cluster. Researchers have suggested that precise measurements of PSR J1922+37’s distance and proper motion will be necessary to confirm its association with NGC 6791.
Potential for Further Discoveries
The researchers indicated that NGC 6791’s compact and high surface brightness environment could host additional pulsars. An estimate provided in the study predicts that as many as nine pulsars may exist within this cluster. The team noted that further observations using advanced techniques could help verify these predictions.
The report further highlights that the discovery has been described as a significant development in the understanding of pulsars within open clusters, an area of study previously limited due to low stellar density in such regions. Verification of PSR J1922+37’s cluster membership will require additional studies, including proper motion analysis to establish a definitive connection.
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