monitor

First World War II and then the Cold War turned Greenland into a magnificent surveillance platform belonging to Denmark but granting the United States a VIP pass that it now wants to switch to annexation. Because that piece of frozen land (less and less) has rare earthsbut the most attractive thing has always been its strategic location. Old radars are not enough. The melting of Greenland has opened new sea routes that Russia and China have welcomed with open arms. the advantages it offers compared to traditional routes. Of the 15 military bases that the US had in Greenland in 1945, now only one remains: the Pituffik Air Base or Thule. And a problem: outdated and insufficient systems to monitor what happens there, such as acknowledged the Pentagon first and the Mitchell Institute for Aerospace Studies after. So they have gotten to work to solve it: the United States Department of Defense agency responsible for the development of cutting-edge technologies for military use (DARPA) has requested a new technology collected in Frosty. This program aims to develop new radars that operate reliably in the harsh Arctic environment. DARPA is seeking proposals capable of detecting aerial targets at least 75 kilometers away with a detection probability greater than 90%. The coveted new polar “silk road”. The launch of this new radar is important because it would mean having a real lookout in the Arctic and on the new route that has appeared so that the great world powers can gain commercial and military advantage. China has already made clear what do you want be a “great polar power”“. The immediate advantage is reduce shipping times to Europe from up to 50 days to less than half (on its route through Suez). This recent academic article In its security report, the United States Coast Guard reviews other possible risks such as the expansion of its fishing grounds, access to natural resources for scientific cooperation and mentions the existence of its advanced fleet of modern icebreakers and Chinese submarines capable of operating under the ice. Spoiler: With current technology, they are difficult to detect from the surface. For Russia, the new passage route that is being opened is a threat to the current North Sea route, which operates under its jurisdiction. Furthermore, Greenland is part of the GIUK bottleneck (shared with the United Kingdom and Iceland) that its northern fleet must pass through to reach the open waters of the Atlantic, at the gates of the United States. We are talking about nuclear submarines as advanced as the Borei-A class and the Yasen-M. Also at stake is the sovereignty of the Lomonosov Ridge, an underwater mountain range that links it to Greenland, which could eventually give it exclusive rights to vast hydrocarbon reserves. And that’s without talking about the massive rare earth deposits The technical challenge of being so far north. The northern lights are very beautiful, but they generate a huge amount of electromagnetic noise when they occur. Since the Earth’s magnetic field lines also converge at the North Pole, the ionosphere is unstablegenerating scintillation that corrupts the GPS signal and absorption in the polar cap. In short, conventional radars not only fall short, but sometimes also go blind. The DARPA wish list. What the US agency wants It is essentially transforming the electromagnetic chaos of the Arctic into a detection tool with a brain in the form of processing software with advanced algorithms that dynamically “filter” interference from geomagnetic storms to isolate potential threats. Furthermore, it would not be a single giant antenna, but rather a mesh of small mobile nodes that share data to triangulate targets. These are the radars you request: A passive environmental noise radar that does not simply emit a signal and wait for the bounce, but uses natural radio frequency noise from the environment to detect objects. That is, it does not treat noise as an interference, but as a source. If a ship passes through that noise, it generates a disturbance that can be detected. Radars Over-the-Horizon that, unlike line-of-sight ones, which travel in a straight line and collide with the curvature of the Earth, these are capable of bouncing waves off the ionosphere to be able to detect objects beyond the Earth’s curvature. They are indicated to detect maritime vessels or aircraft flying at low altitude, thus evading conventional radars. An externally illuminated radar with high-power transmitters located at great distances as power sources, like Alaska’s HAARPwhich allows objects to be illuminated indirectly. For when. As mark your roadmapthe receipt of industry proposals for the tender ended on January 30 and the next 18 months will focus on algorithm development, offline implementation and laboratory testing. Between 2027 and 2028, the integration of the software into real hardware would take place, with field tests in Point Barrow and Poker Flat, Alaska. Therefore, to see this new and ambitious radar network in action we will have to wait until 2028. In Xataka | Russia and China already had an advantage over the US in the Arctic. After Greenland, it has multiplied In Xataka | Now that Europe has sent its troops to Greenland, a question emerges that no one wants to ask: what happens if the US invades it? Cover | JoAnne Castagna / US Army Corps of Engineers (Public domain)