22 octobre 2024 | International, C4ISR, Sécurité
16 janvier 2020 | International, C4ISR
The Pentagon wants help for its satellites to talk to each other
By: Nathan Strout
The Space Development Agency wants its satellites to be able to easily talk to each other and is considering using optical intersatellite links for communications within its future low earth orbit space architecture.
Now, the organization is looking for industry's help on what standards should be used for those links.
On Jan. 15, the agency issued a request for information to industry to inform its attempt to establish an Optical Intersatellite Link Open Standard.
Most satellites don't speak with each other directly. Instead, they utilize radio-frequency communications with a ground station to relay communications between satellites. Some satellites, however, are able to use optical links to provide direct communications between satellites without a ground station acting as an intermediary. The SDA wants to use this technology for what it calls its “transport layer,” the backbone of its plans for a new space architecture in low earth orbit.
The SDA was established in March 2019 to design the Department of Defense's future threat-driven space architecture, a setup it has since defined as a multi-layered constellation of hundreds of small satellites providing several capabilities from LEO. The SDA will not be directly responsible for every layer or constellation within the architecture — most notably, the Hypersonic and Ballistic Tracking Space Sensor is being developed primarily by the Missile Defense Agency — however, the SDA will be the agency in charge of integrating those various efforts into a single architecture.
Key to the entire enterprise is the Tracking Layer, a family of satellites in low earth orbit that will facilitate the flow of data between satellites in orbit and between satellites and the ground. The Transport Layer will be essential in connecting the various sensors and capabilities on orbit with weapons systems on the ground or in the air.
In order to build that capability, the SDA plans to use Optical Intersatellite Links. The optical links will also need to provide range estimates of the distance between satellites in orbit and between satellites and the ground to within a meter in order to provide highly precise timing and positional data for the constellation. The SDA also envisions each satellite utilizing a chip-scale atomic clock as well as GPS signals.
The problem is that there are currently no industry standards for those links. To ensure the interoperability of various vendor technologies used for those links, the SDA wants to establish that standard, and it's asking industry for help.
Responses are due by Feb. 5. More specifics about what the SDA is considering for its standards is available on beta.sam.gov.
According to the request, the SDA plans to issue a solicitation for Tranche 0 of the Transportation Layer in Spring 2020, with additional solicitations for the other capability layers to follow in the summer. That first tranche, known as the war fighter immersion tranche, will consist “of tens of satellites providing periodic, regional sensing and data transport capabilities, including the capability to detect hypersonic glide vehicles and to disseminate time sensitive targeting solutions over tactical data links.” According to the agency, that initial tranche could be delivered as early as fiscal year 2022
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28 août 2019 | International, Aérospatial
Astroscale US Targets DoD Sat Servicing Market
By THERESA HITCHENS WASHINGTON: Japanese start-up Astroscale thinks its space junk technology can be used by the Pentagon for on-orbit satellite servicing, to build a foundation for its ultimate goal of building a space debris removal business, says Ron Lopez, president and managing director of the company's new US unit. “Debris removal is the immediate focus for the company, but there is a lot of [technology] applicability to adjacent areas of the market that end up leading to capabilities that the military needs,” Lopez explained in an interview. “DoD is a customer like any other, with a future need for servicing its own satellites to extend mission life.” For example, Astroscale's sensor and guidance technology that allows it to precisely rendezvous with a piece of debris could also be used by the Air Force to do the same with an active satellite, he said, to inspect it or to make repairs. Likewise, the firm's docking technology is applicable to many types of servicing missions, such as re-fueling, that are of interest to DoD. Astroscale US thus is seeking American partners to help it break into the military space marketplace — starting small with component and tech demos. “We are still in early stage of discussions, and trying to understand what the requirements are,” Lopez said. “We've been busy building partnerships with a lot of small- and mid-sized companies,” he added, to bring together “a very innovative set of technologies and capabilities” that can bring “value-added to the commercial marketplace and DoD as well.” Astroscale launched its US subsidiary in April, opening an office near Denver and is slowly building a staff (currently number four full time employees.) The US subsidiary expands the company from the Japanese headquarters, and branches in Singapore and the United Kingdom. It recently garnered another $30 million to its Series D funding that brings the total amount of capital raised in the round to $132 million, according to the corporate website. The company, founded by Japanese tycoon Nobu Okada in 2013, is fully aware that it is cannot make a business case for orbital debris removal today. There simply isn't a country or a customer ready to pay to fully develop the technology required at the moment; nor is it clear that even if the technology is there customers would be incentivized to pay someone to take out their trash if there is no legal requirement to do so. Indeed, there may even be legal obstacles since the 1967 Outer Space Treaty deems debris the property of the launching state, meaning that a garbage collector would need permission of the owner to do so. Therefore, on-orbiting servicing is a nearer-term mission that will allow the company to continue to thrive and grow. “On-orbit servicing can enable space debris removal,” Lopez summed up. “We are working with customers who have an interest in adjacent missions; those interests help us develop our core techology.” The Air Force actively has been exploring on-orbit servicing technologies through a series of small business and tech demo projects. For example, in July, the Air Force Research Laboratory (AFRL) updated its request for information (RFI) designed to help the service get a grip on the available industrial base for autonomous Rendezvous and Proximity Operations (RPO) and “InspectorSat capabilities,” as well as the limits of current commercial technologies. Responses were due Aug. 9. Further, the space industry is lobbying hard for the Commerce Department to issue new US government rules to ease development of on-orbit servicing technologies and spur the market via more coherent licensing obligations. Licensing for satellites that can perform proximity operations — that is, can safely maneuver around another satellite or a piece of debris, dock with that object, and perform some function such as re-fueling — currently falls between agency cracks. Meanwhile, the CONFERS consortium, led by the Defense Advanced Research Projects Agency (DARPA) is working to develop industry-created best practices for such tricky space operations. Despite the hurdles for a non-US company to get its subsidiary fully credentialed to compete for DoD contracts, Lopez says being a wholly-owned Japanese company is a help, not a hindrance, because of the high level placed on cooperation in space by Tokyo and Washington. While bilateral and multilateral collaboration is often equated with simply “trying to fulfill political objectives,” Lopez stressed that it also helps the countries involved to reduce schedule and cost risks. “When we have real and evolving threats, the need is urgent and we have an environment where our tax dollars are constrained,” he said, “what that translates into is that collaboration is a way to reduce risks.” https://breakingdefense.com/2019/08/astroscale-us-targets-dod-sat-servicing-market/
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27 juin 2024 | International, Terrestre
The Navy’s ongoing carrier conundrum
Ike's latest extended deployment raises questions about whether the Navy's carriers can respond to all the global hot spots where they are required.