Seen and heard: Arctic sea ice, Russian jamming, earthquake monitoring

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New insights into Arctic sea ice. Photo: micheldenijs/E+/Getty Images

Research based on data from Spire Global’s GNSS-R constellation has made it possible to create Arctic sea ice maps, representing a major step forward for GNSS-R. The research, made available by the European Space Agency, suggests that harnessing GNSS-R signals could become an important complement to existing altimetry missions to monitor ice. The study took advantage of Spire’s GNSS-R data to retrieve sea ice surface measurements over the entire winter season. The results show strong agreement with altimetry datasets, including the European Space Agency’s CryoSat mission.

Russian obfuscation goes to the dogs Credit: Marit Linnane Abrahamsen/Finnmarksløpet

Military jamming and decoys from Russia’s Kola Peninsula interfered with GNSS trackers on dog sleds in Europe’s longest sled race, the 1,200-kilometre Finnmarkslupt, held in Norway in March. Electronic warfare has degraded GPS signals, forcing truck drivers to rely more on route markings and use traditional compasses and maps. Event organizers, who introduced a live tracking system for fans, found it difficult to follow, but the runners finished the race without incident.

Historic photos find their places Image: fstop123/iStock/Getty Images Plus/Getty Images

Michigan Technological University is examining 11,000 historical photographs of the state’s Upper Peninsula to find precisely where each photographer stood for the photo. According to the university’s GIS data librarian, Bob Cowling, the site will provide richer information about the surrounding areas of the place, especially if structures or environmental features no longer exist. Donated historical photographs often arrive without any dates or location information attached to them. The project will make it easier to find them on the map and make it possible to visualize what existed in the past.

Türkiye establishes an earthquake monitoring center. Source: mustafaoncul/iStock/Getty Images Plus/Getty Image

In February 2023, a devastating 7.8-magnitude earthquake struck near the Turkish-Syrian border, followed by another earthquake of the same magnitude. Six Turkish universities have launched TR-TRAK-GNSS, a real-time geodetic monitoring network to track earthquake-related ground deformation across Thrace and the southern Marmara region. The 28-station system is expected to develop into a major scientific and earthquake early warning system. Once fully deployed, it will form a continuous surveillance ring encircling Thrace and southern Marmara.

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