Tag

Gnss

All articles tagged with #gnss

technology1 month ago•6 min saved

GPS Jamming Sparks Hidden Maritime Risk in the Gulf

GPS jamming off Iran is creating AIS position distortions near the Strait of Hormuz, making vessels appear on land or in strange clusters and raising collision risks as electronic warfare spills into Gulf waters. While Iran is suspected, there is no official confirmation; researchers use radar and satellite data to map the interference and are pursuing mitigations from anti-jamming antennas to alternative navigation methods (gyroscopes, accelerometers, star-mapping), though no solution is perfect. The episode highlights the vulnerability of open GNSS and the push toward more secure, multi-sensor positioning.

via BBC|

#ais #gnss #gps

space1 month ago•9 min saved

Mars Global Localization Gives Perseverance GPS-like Autonomy

NASA's JPL repurposed Perseverance's Helicopter Base Station to run a terrain-based localization algorithm that compares the rover's navigation-camera panoramas with onboard Mars terrain maps, delivering GPS-like positioning and enabling more autonomous navigation without constant Earth-based guidance. The test used the faster HBS hardware and found RAM bit faults, which were isolated to keep the algorithm reliable, showcasing Ingenuity-era hardware enabling new capabilities for the rover.

via Hackaday|

#gnss #mars #nasa-jpl

science10 months ago•3 min saved

South Africa's Land Is Rising Out of the Ocean, Scientists Discover Why

Scientists have discovered that South Africa's land is rising up to 2 millimeters per year, primarily due to drought-induced water loss, challenging previous mantle flow explanations. This finding, supported by GNSS and satellite data, highlights the impact of climate change on Earth's crust and offers a potential new method for monitoring water scarcity.,

via ScienceAlert|

#climate-change #gnss #land-uplift

science-and-technology2 years ago•3 min saved

NASA Detects Tsunamis Through Atmospheric Rumbles

NASA's Jet Propulsion Laboratory is testing a new system called GUARDIAN that uses data from GPS and other wayfinding satellites to detect tsunamis by analyzing the low-frequency sound and gravity waves created by the displacement of air above the ocean's surface. The system can produce a snapshot of a tsunami's rumble reaching the ionosphere within 10 minutes and could potentially provide up to an hour of warning. GUARDIAN is currently focused on the Pacific Ocean's Ring of Fire, where 78% of confirmed tsunamis between 1900 and 2015 occurred. The system aims to complement existing ground- and ocean-based instruments for faster tsunami detection.

via NASA Jet Propulsion Laboratory|

#early-warning #gnss #nasa