December 16, 2022 | International, C4ISR
Space imaging company Maxar agrees to $6.4 billion takeover
Following the transaction, Maxar will remain a U.S.-controlled and operated company.
January 16, 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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July 4, 2018 | International, Aerospace, C4ISR
UK must compete future surveillance aircraft procurement, parliament states
Gareth Jennings The United Kingdom must hold a fair and open competition before selecting any new surveillance aircraft to replace its current Boeing E-3D Sentry airborne warning and control system (AWACS), the country's parliament has said. The intervention by the Defence Committee followed earlier media reports that the Ministry of Defence (MoD) had already decided to procure the Boeing E-737 Airborne Early Warning and Control (AEW&C) aircraft to replace the Royal Air Force's (RAF's) increasingly unserviceable and expensive E-3Ds. “The chairman of the Defence Committee has written to the Minister of Defence Procurement to request that any requirement for replacing the UK's AWACS aircraft be put out to a competitive tender, rather than bought ‘off-the-shelf' with no competition taking place,” the committee declared on 3 July, adding: “On the possibility of Sentry being replaced with a new system, the [committee] notes the advantages of a competitive tender in terms of maximising value for money and allowing proper consideration of a range of alternatives. The committee also considers that a competition is particularly appropriate in this case, as there are viable alternatives available, which deserve to be given fair consideration.” The RAF currently has six E-3Ds in its operational fleet, with the type having entered service in 1991. While other operators of the type have benefited from regular upgrades, the RAF's fleet has fallen behind in terms of capabilities due to a lack of investment. In January 2017, the fleet was temporarily grounded due to an electrical fault, and despite an announcement in the Strategic Defence and Security Review (SDSR) of 2015 that the fleet would be upgraded and extended from 2025 to 2035, the legacy Boeing 707 host airframe is becoming too expensive to sustain and an alternative is understood to be being sought. http://www.janes.com/article/81497/uk-must-compete-future-surveillance-aircraft-procurement-parliament-states
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December 19, 2022 | International, Aerospace
L3Harris moves to acquire Aerojet Rocketdyne
L3Harris, the countryâs sixth largest defense contractor, plans to acquire propulsion expert Aerojet Rocketdyne in a deal valued at $4.7 billion.