Silentbarker is a class of classified United States spy satellites for space domain awareness developped by US Space Force and National Reconnaissance Office. [1] [2] [3]
Silentbarker is a class of classified United States spy satellites for space domain awareness developped by US Space Force and National Reconnaissance Office. [1] [2] [3]
| Name | Launch date | Launcher | COSPAR ID | Status | Notes |
|---|---|---|---|---|---|
| Silentbarker 1, USA-346 | 10 September 2023 | Atlas V | 2023-140A | NROL-107 | |
| Silentbarker 2, USA-347 | 10 September 2023 | Atlas V | 2023-140B | NROL-107 | |
| Silentbarker 3, USA-348 | 10 September 2023 | Atlas V | 2023-140C | NROL-107 |
National Security Space Launch (NSSL) is a program of the United States Space Force (USSF) intended to assure access to space for United States Department of Defense and other United States government payloads. The program is managed by the Assured Access to Space Directorate (SSC/AA) of the Space Force's Space Systems Command (SSC), in partnership with the National Reconnaissance Office.
United Launch Alliance, LLC (ULA) is an American launch service provider formed in December 2006 as a joint venture between Lockheed Martin Space and Boeing Defense, Space & Security. The company designs, assembles, sells and launches rockets, but the company subcontracts out the production of rocket engines and solid rocket boosters.
The Delta IV Heavy was an expendable heavy-lift launch vehicle, the largest type of the Delta IV family. It was the world's third highest-capacity launch vehicle in operation at the time of its retirement in 2024, behind NASA's Space Launch System and SpaceX's Falcon Heavy and closely followed by CASC's Long March 5. It was manufactured by United Launch Alliance (ULA) and was first launched in 2004. ULA retired the Delta IV Heavy in 2024. Future ULA launches will use the new Vulcan Centaur rocket. Delta IV's final flight was on 9 April 2024.
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Space domain awareness is the study and monitoring of satellites orbiting the Earth. It involves the detection, tracking, cataloging and identification of artificial objects, i.e. active/inactive satellites, spent rocket bodies, or fragmentation debris.
Firefly Aerospace is an American private aerospace firm based in Cedar Park, Texas, that develops small and medium launch vehicles for commercial launches to orbit. The company completed its $75 million Series A investment round in May 2021, which was led by DADA Holdings. The current company was formed when the assets of the former company Firefly Space Systems were acquired by EOS Launcher in March 2017, which was then renamed Firefly Aerospace. Firefly's stated purpose is to increase access to space, similar to other private spaceflight companies.
Boeing Crew Flight Test (Boe-CFT) was the first crewed mission of the Boeing Starliner capsule. Launched on 5 June 2024, the mission flew a crew of two NASA astronauts, Barry E. Wilmore and Sunita Williams, from Cape Canaveral Space Force Station to the International Space Station. The mission was meant to last eight days, ending on 14 June with a landing in the American Southwest. However, the capsule's thrusters malfunctioned as Starliner approached the ISS. After more than two months of investigation, NASA decided it was too risky to return Wilmore and Williams to Earth aboard Starliner. Instead, the Boeing spacecraft returned uncrewed on 7 September 2024, and the astronauts will ride down on the SpaceX Crew-9 spacecraft in February 2025.
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Orbital Express Launch Ltd., or Orbex, is a United Kingdom-based aerospace company that is developing a small commercial orbital rocket called Prime. Orbex is headquartered in Forres, Moray, in Scotland and has subsidiaries in Denmark and Germany. Its future launch complex, Sutherland spaceport, is being built on the A' Mhòine peninsula in the county of Sutherland, northern Scotland.
Photon is a satellite bus based on Rocket Lab the Electron kick stage. It moves satellites into their appropriate orbits once boosted by rockets such as Electron. It is customizable to serve uses including LEO payload hosting, lunar flybys, and interplanetary missions.
Terran 1 was an expendable two-stage small-lift launch vehicle developed by Relativity Space. Development began in 2017 and the rocket was retired in 2023. Most structures and components of the vehicle are manufactured with 3D printing processes.
Varda Space Industries is a privately held American space research company headquartered in El Segundo, California. Founded in January 2021, the company designs, builds, and flies spacecraft that process pharmaceuticals in microgravity. The company targets small molecule crystallization, which is difficult to produce in Earth's gravity, and brings those crystals back to Earth with their atmospheric reentry vehicle. Investors in the company include venture capitalists such as Khosla Ventures and Peter Thiel's Founders Fund.
Orbital Test Vehicle 7 (OTV-7), also referred to as United States Space Force-52 (USSF-52) or USA-349, is the fourth flight of the second Boeing X-37B, an American unmanned vertical-takeoff, horizontal-landing spaceplane. It was launched to a highly elliptical high Earth orbit aboard a Falcon Heavy rocket from LC-39A on 28 December 2023.
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