4 décembre 2020 | International, Aérospatial
WASHINGTON — The fourth GPS III satellite has achieved operational acceptance from the U.S. Space Force at record speeds using an expedited process that was 10 days faster than previous efforts.
“[The fourth GPS III satellite] sets a new standard for handover from the contractor launch team to operational acceptance, setting the satellite healthy to the global user community approximately 30 days post launch. Moving forward with future GPS III launches, the timeline between launch and the satellite being set healthy will be at a minimum,” said 2 Space Operations Squadron Flight Commander Capt. Collin Dart in a statement.
The satellite was launched Nov. 5 from Cape Canaveral Air Force Station in Florida aboard a SpaceX Falcon 9 rocket.
The addition of SV04 to the GPS constellation marks another step toward making M-Code — a more robust GPS signal for military use — available to the war fighter. M-Code provides a more accurate GPS signal with anti-jamming and anti-spoofing capabilities, making it harder for adversaries to block or degrade.
Lockheed Martin is the primary contractor for the 10 GPS III satellites and the 22 GPS III Follow-On satellites in development. The Space Force granted GPS IIIF Milestone C in July, clearing the way for production to begin.
“M-Code signals are more-secure, harder-to-jam and spoof, and are critical to helping our war fighters complete their missions, especially in contested environments,” Tonya Ladwig, Lockheed Martin's vice president for navigation systems, said in a statement. “GPS III is a war fighting system and we are proud to be helping bring this critical capability to the men and women protecting our nation.”
“The highly encrypted M-Code to protect GPS signals from jamming and spoofing is currently enabled on 22 GPS satellites of various generations; 24 are needed to bring the M-Code to the next level of operational capability,” Dart said. “SV04 brings the constellation to 23 M-Code capable vehicles.”
The 24th M-Code-enabled GPS satellite, which will be the fifth GPS III satellite, is currently ready for launch. However, the launch is not expected until July 2021 at the earliest.
Upgrades to the GPS ground systems and distribution of M-Code-enabled receivers to the field are also needed to get the advanced signal into the hands of war fighters.
In addition to moving the constellation closer to M-Code availability, the addition of another GPS satellite to the constellation will provide greater access to the improved L2C and L5 signals to civilian users.
“For our billions of civil users, it brings the count up to 23 L2C spacecraft and 16 L5 spacecraft,” said Col. Ryan Colburn, director of the Space and Missile Systems Center Portfolio Architect office's Spectrum Warfare Division. “For professional users with existing dual-frequency operations, L2C enables faster signal acquisition, enhanced reliability, and greater operating range. L5 is broadcast in a radio band reserved exclusively for aviation safety services. It features higher power, greater bandwidth, and an advanced signal design.”
And according to Lockheed Martin, the GPS III satellites also include the new L1C signal, which provides improved civilian user connectivity.
26 février 2021 | International, Aérospatial, Naval, Terrestre, C4ISR, Sécurité
Saudi Arabian Military Industries is charged with boosting domestic industry and increasing technology transfer into local sectors. And it is Walid Abukhaled, the CEO of the defense conglomerate, who must accomplish these goals.
23 juillet 2020 | International, Aérospatial
Nathan Strout The Defense Innovation Unit has awarded Sierra Nevada Corporation a contract to build an orbital laboratory that would serve as a kind of unmanned space station, the company announced July 14. The unmanned orbital outpost will be placed in low Earth orbit to be used for experiments and demonstrations. The autonomous, free flying vehicle will be able to host payloads and support space assembly and manufacturing, microgravity experimentation, logistics, training, testing and evaluations. Under the contract, Sierra Nevada Corporation will repurpose their Shooting Star transport vehicle into a scalable, autonomous space station that can be used for experiments and demonstrations. The Shooting Star vehicle is a 16-foot attachment to the company's Dream Chaser space plane that was developed for NASA Commercial Resupply Services 2 missions. The vehicle was initially designed to provide extra payload storage and cargo disposal upon re-entry. “We're excited by the multi-mission nature of Shooting Star,” Fatih Ozmen, SNC's chief executive, said in a statement. “It was originally developed for NASA resupply missions to the International Space Station, and since then we keep identifying new capabilities and solutions it offers to a wide variety of customers.” The company's press release notes that while the initial orbital outpost will operate in LEO, future orbits could be placed in other orbits, including cislunar. “The current Shooting Star is already designed with significant capabilities for an orbital outpost and by adding only a few components we are able to meet Department of Defense needs.” added Steve Lindsey, senior vice president of strategy for SNC's space systems. “We are proud to offer our transport vehicle to DoD as a free-flying destination for experimentation and testing, expanding beyond its current payload service capabilities for Dream Chaser cargo missions.” According to the original DIU solicitation released June 2019, orbital outposts will need to be established in low Earth orbit within 24 months of the award. A DIU spokesperson told C4ISRNET at the time that the “the prototype will explore the military utility of exclusive DoD access to an unmanned orbital platform in order to perform experiments with no risk to human crew or other non-DOD payloads.” https://www.c4isrnet.com/battlefield-tech/space/2020/07/16/defense-innovation-unit-issues-contract-for-unmanned-orbital-outpost/
12 juin 2019 | International, Aérospatial, Sécurité, Autre défense
By: Nathan Strout The U.S. Air Force's first next-generation GPS satellite launched in December and the second GPS III satellite is slated to liftoff in July. But there Air Force has a problem: The ground system currently in use isn't fully capable of controlling GPS III satellites. Worse, a new ground system that can, formally known as the next-generation operational control system (OCX), is five years behind schedule and won't be delivered until June 2021 at the earliest, according to the Government Accountability Office. Enter the GPS III Contingency Operations (COps) software—a critical stop gap measure that will update the current ground control system and allow it to access some of the more advanced features of the GPS III satellites until the next-generation operational control system is ready. On July 11, primary contractor Lockheed Martin announced that it had delivered the COps upgrade to the Air Force. “Positioning, navigation and timing is a critical mission for our nation and COps will allow the Air Force to gain early access to its new GPS III satellites,” said Johnathon Caldwell, Lockheed Martin's vice president for Navigation Systems. “We just finished final qualification testing and delivery on COps, and it will be integrated and installed on the [Architecture Evolution Plan Operational Control System] over the summer. We look forward to the Air Force ‘flying' a GPS constellation on the COps OCS which includes the new GPS III satellites, later this year.” The new GPS III satellites are built to be more robust and accurate than their predecessors and come with advanced features such as the ability to use M-Code, an encrypted GPS signal for use by the military. The COps upgrade will allow the current ground system to control the GPS III satellites as well as the legacy GPS satellites. It will also allow the current system to access M-code Early Use, an encrypted GPS signal with improved anti-jamming and anti-spoofing capabilities, beginning in 2020. The Air Force contracted with Lockheed Martin to deliver the patch in 2016, the same year that the OCX program triggered a Nunn-McCurdy cost breach—a type of violation caused by significant cost growth that requires a program to be shut down unless the Department of Defense intervenes and approves a new cost estimate. The $6.2 billion OCX program is already five years behind schedule, and a May 21 Government Accountability Office report warned that the OCX program could be delayed even further. In addition, the Air Force has acknowledged that delays are possible during the seven-month testing period following delivery. Raytheon, the primary contractor behind OCX, rejected the GAO report, claiming that its findings were inaccurate. https://www.c4isrnet.com/battlefield-tech/c2-comms/2019/06/11/air-force-gets-new-stopgap-system-for-gps-3-satellites/