13 novembre 2024 | International, C4ISR, Sécurité
4 octobre 2018 | International, Aérospatial, C4ISR
Israel Plans Anti-Missile Nano Satellite Constellation
By ARIE EGOZI
TEL AVIV: Israel is planning constellations of nano satellites, built by Israel Aerospace Industries (IAI), that will allow almost continuous coverage of “areas of interest,” which are likely to include Iran, Syria, Lebanon and other countries, according to experts that are not connected in any way to the program. IAI refused to comment.
The first nano satellite was developed by IAI and was launched into space in 2017 as part of a scientific experiment. The 5-kilogram satellite — approximately the size of a milk carton — is equipped with special cameras able to identify various climatic phenomena, and a monitoring system that allows the choice of areas to be imaged and researched.
”We are developing the capability to launch a constellation of Nano satellites. The large number of satellites will give us the capability for a much higher rate of revisits, and actually a continuous monitoring of areas of interest.” says Opher Doron, general manager of IAI's Space Division.
The nano satellites optical payloads are smaller and the quality of their optical payloads is lower. ”But by using a temporal resolution method this problem is dealt with in a very effective way,” Doron claims. “This method is not directly related to the quality of the sensor but is based on the frequency of revisits over a site.“
The other problem with smaller satellites is color. “Resolution is, of course, very important but we also work on improving the color quality of the images, Doron said. “A good intelligence expert does not need color to extract, the needed intelligence from a satellite image, but when it comes to decision-makers, color is of great importance.”
What underpins all this? It takes a ballistic missile 12 to 15 minutes to travel from Iran to Israel. The earlier a launch is detected and the earlier the trajectory of the missile can be plotted, the better the chances to intercept it far from its designated target.
Today, low orbit Ofeq spy satellites visit “areas of interest” in wide intervals so their optical or radar payloads cannot keep a persistent watch. When it comes to the ballistic missile threat, this is a major problem. Israeli sources say that some 30 minutes are needed from the command to prepare a ballistic missile for launch until it is ready for launch, and this if the protection silos are well equipped. If the enemy is aware of the “visiting” time of the spy satellites over his territory this can be the perfect time to avoid detection of the preparations until the launch itself.
Once launch occurs, Israel is supposed to get warnings from Lockheed Martin's Space-Based Infrared System (SBIRS),the US constellation of geosynchronous earth orbit (GEO) satellites. The U.S also deploys an X-band radar system in southern Israel to improve detection of ballistic missiles. This complements the layer supplied by the Green Pine radar, part of the Israeli Arrow missile interceptors.
The first nano satellite was launched from India on the PSLV-C37 launcher with 103 other nano satellites. The plan to build and launch nano satellites first emerged a decade ago. A joint company of IAI and Rafael would undertake the mission. But that plan was deserted.
Yizhak Ben Israel, chairman of the Israeli space agency, served in the Israeli air force and later was in charge of developing Israel's most advanced and classified military systems at the development directorate in the Defense Ministry. He notes that, although nanosats possess much less exquisite capabilities than SBIRS or other large satellites, “when you use a constellation of such satellites the combined capability can be very effective in missions like locating missile launchers.” The other advantage of nano satellites is their price: “You go from hundreds of million of dollars for a full size imaging satellite to some millions of dollars when it comes to a nano satellite.”
Not directly related to the nano satellite program but part of Israel's space effort, IAI teamed with British start-up company Effective Space to make a fleet of special satellites weighing roughly 880 pounds that can refuel other satellites in space. IAI signed an agreement for technological and financial cooperation with the smaller company. While Effective Space is headquartered in London, its CEO, Arie Halsband, was general manager of IAI's space division before starting his own company.
https://breakingdefense.com/2018/10/israel-plans-anti-missile-nano-satellite-constellation
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1 octobre 2018 | International, Aérospatial
US government may gain new power to track drones and shoot them down
By: David Koenig, The Associated Press An aviation bill Congress is rushing to approve contains a little-noticed section that would give authorities the power to track, intercept and destroy drones they consider a security threat, without needing a judge's approval. Supporters say law enforcement needs this power to protect Americans from terrorists who are learning how to use drones as deadly weapons. They point to the Islamic State terrorist group's use of bomb-carrying drones on battlefields in Iraq, and warn that terrorists could go after civilian targets in the United States. Critics say the provision would give the government unchecked power to decide when drones are a threat. They say the government could use its newfound power to restrict drone-camera news coverage of protests or controversial government facilities, such as the new detention centers for young migrants. The provision is tucked in a huge bill that provides $1.7 billion in disaster relief and authorizes programs of the Federal Aviation Administration, which regulates drones. The House approved the measure Wednesday by a 398-23 vote, and the Senate is expected pass it on to President Donald Trump's desk in the coming days. The White House signaled support of the drone provision in July. Sen. Ron Johnson, a Wisconsin Republican, introduced the Preventing Emerging Threats Act this year. It would give the Homeland Security Department and the Justice Department power to develop and deploy a system to spot, track and shoot down drones, as unmanned aircraft are called. Officers would have the authority to hack a drone operator's signal and take control of the device. The bill was never considered on its own by the full Senate or the House. Instead, in private negotiations that ended last weekend, it was tucked into a "must-pass" piece of FAA legislation. Homeland Security Secretary Kirstjen Nielsen wrote in a recent op-ed that the threat of drone attacks "is outpacing our ability to respond." She said criminals use drones to smuggle drugs across the border, but worse, terrorists like the Islamic State are deploying them on the battlefield. "We need to acknowledge that our first and last chance to stop a malicious drone might be during its final approach to a target," she wrote. Attorney General Jeff Sessions said in a statement this week that the measure "would finally give federal law enforcement the authority we need to counter the use of drones by drug traffickers, terrorists and criminals." The National Football League's top security executive recently endorsed the bill's intent but said it should go further by letting trained local police officers intercept drones. The official, Cathy Lanier, a former Washington, D.C., police chief, said the NFL is alarmed by an increase in drone flyovers at stadiums. Opponents including the American Civil Liberties Union argue that the proposal gives the government unchecked power to track and seize drones without regard for the privacy and free-speech rights of legitimate drone operators. It exempts the government agencies from certain laws, including limits on wiretapping. The bill provides no oversight or means to question a government decision about what is a "credible threat" and what is an "asset" or "facility" in need of protection when drones are nearby. News organizations are increasingly using drones. They deploy them to cover natural disasters like the recent flooding from Hurricane Florence and also controversies such as the Trump administration's construction of new camps for migrant children who were separated from their parents at the U.S.-Mexico border. "Being able to see footage of protests, the size of protests, being able to see facilities like those at the border is useful — those are newsworthy events," said India McKinney, a legislative analyst for the Electronic Frontier Foundation. Without a specific means to protect First Amendment rights — something not in the bill — "it's entirely feasible to think that the DOJ or DHS could just decide that a drone owned by a news organization provides a credible threat and then destroys the footage," she said. ___ David Koenig can be reached at http://twitter.com/airlinewriter https://www.militarytimes.com/news/your-military/2018/09/28/government-may-gain-new-power-to-track-drones-and-shoot-them-down
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19 mars 2024 | International, Naval
Project Overmatch budget details too sensitive to share, Navy says
At least three carrier strike groups have Project Overmatch capabilities aboard, a U.S. Navy spokesperson told C4ISRNET.