“On Sept. 8, NASA launched the Origins Spectral Interpretation Resource Identification Security – Regolith Explorer, or OSIRIS-REx mission from Cape Canaveral Air Force Station in Florida. OSIRIS-REx is the first U.S. mission to sample an asteroid. The spacecraft is scheduled to arrive at near-Earth asteroid Bennu in 2018, survey the asteroid’s surface, retrieve at least 60 grams (2.1 ounces) of surface material, and return the sample to Earth in 2023 for study. Analysis of the sample will reveal the earliest stages of the solar system’s evolution and the history of Bennu over the past 4.5 billion years.”
“The Air Force’s AFSPC-6 payload, encapsulated inside a 4-meter diameter payload fairing, is transported and mated to a Delta IV rocket at Space Launch Complex-37. AFSPC-6 will deliver two Geosynchronous Space Situational Awareness Program (GSSAP) satellites to near-geoÂsynchronous orbit. The twin GSSAP spacecraft, built by Orbital ATK, will support U.S. Strategic Command space enhanced awareness operations.”
Wikipedia dixit:
“Air Force Space Command (AFSPC) is a major command of the United States Air Force, with its headquarters at Peterson Air Force Base, Colorado. AFSPC supports U.S. military operations worldwide through the use of many different types of satellite, launch and cyber operations. Operationally, AFSPC is an Air Force component command subordinate to U.S. Strategic Command (USSTRATCOM), a unified combatant command.
More than 38,000 people perform AFSPC missions at 88 locations worldwide and comprises Regular Air Force, Air Force Reserve and Air National Guard military personnel, Department of the Air Force Civilians (DAFC), and civilian military contractors. Composition consist of approximately 22,000 military personnel and 9,000 civilian employees, although their missions overlap.
AFSPC gained the cyber operations mission with the stand-up of 24th Air Force under AFSPC in August 2009. On 1 December 2009, the strategic nuclear intercontinental ballistic missile (ICBM) mission that AFSPC inherited from Air Combat Command (ACC) in 1993, and which ACC had inherited following the inactivation of Strategic Air Command (SAC) in 1992, was transferred to the newly established Air Force Global Strike Command (AFGSC). Spacelift operations at the East and West Coast launch bases provide services, facilities and range safety control for the conduct of DOD, NASA and commercial launches. Through the command and control of all DOD satellites, satellite operators provide force-multiplying effects—continuous global coverage, low vulnerability and autonomous operations. Satellites provide essential in-theater secure communications, weather and navigational data for ground, air and fleet operations and threat warning. Ground-based radar and Defense Support Program satellites monitor ballistic missile launches around the world to guard against a surprise missile attack on North America. Space surveillance radars provide vital information on the location of satellites and space debris for the nation and the world.
As of 2013, Air Force Space Command is considering Space Disaggregation, which would involve replacing a few large multimission satellites with larger numbers of smaller single purpose platforms. This could be used to defend against ASATs, by increasing the number of targets that needed to be attacked.”
The NRO satellites are operated by the United States National Reconnaissance Office. The NRO missions are generally classified, so their exact purposes and orbital elements are not available to the public.
“The Atlas V was developed by Lockheed Martin Commercial Launch Services as part of the US Air Force Evolved Expendable Launch Vehicle (EELV) program and made its inaugural flight on August 21, 2002. The vehicle operates out of Space Launch Complex 41 at Cape Canaveral Air Force Station and Space Launch Complex 3-E at Vandenberg Air Force Base. Lockheed Martin Commercial Launch Services continues to market the Atlas V to commercial customers worldwide.
The Atlas V first stage, the Common Core Booster (CCB), is 12.5 ft (3.8 m) in diameter and 106.6 ft (32.5 m) in length. It is powered by a single Russian RD-180 main engine burning 627,105 lb (284,450 kg) of liquid oxygen and RP-1. The booster operates for about four minutes, providing about 4 meganewtons (860,000 lbf) of thrust. Thrust can be augmented with up to five Aerojet strap-on solid rocket boosters, each providing an additional 1.27 meganewtons (285,500 lbf) of thrust for 94 seconds. The Atlas V is the newest member of the Atlas family. Compared to the Atlas III vehicle, there are numerous changes. Compared to the Atlas II, the first stage is a near-redesign. There was no Atlas IV. The “1.5 staging” technique was dropped on the Atlas III, although the same RD-180 engine is used. The RD-180 features a dual-combustion chamber, dual-nozzle design and is fueled by a kerosene/liquid oxygen mixture. The main-stage diameter increased from 10 feet to 12.5 feet. As with the Atlas III, the different mixture ratio of the engine called for a larger oxygen tank (relative to the fuel tank) compared to Western engines and stages. The first stage tanks no longer use stainless steel monocoque “balloon” construction. The tanks are isogrid aluminum and are structurally stable when unpressurized. Use of aluminum, with a higher thermal conductivity than stainless steel, requires insulation for the liquid oxygen. The tanks are covered in a polyurethane-based layer. Accommodation points for parallel stages, both smaller solids and identical liquids, are built into first stage structures.
The Centaur upper stage uses a pressure stabilized propellant tank design and cryogenic propellants. The Centaur stage for Atlas V is stretched 5.5 ft (1.68 m) relative to the Atlas IIAS Centaur and is powered by either one or two Aerojet Rocketdyne RL10A-4-2 engines, each engine developing a thrust of 99.2 kN (22,300 lbf). The inertial navigation unit (INU) located on the Centaur provides guidance and navigation for both the Atlas and Centaur, and controls both Atlas and Centaur tank pressures and propellant use. The Centaur engines are capable of multiple in-space starts, making possible insertion into low Earth parking orbit, followed by a coast period and then insertion into GTO. A subsequent third burn following a multi-hour coast can permit direct injection of payloads into geostationary orbit. As of 2006, the Centaur vehicle had the highest proportion of burnable propellant relative to total mass of any modern hydrogen upper stage and hence can deliver substantial payloads to a high energy state.
The standard payload fairing sizes are 4 or 5 meters in diameter. The 4.2-meter fairing, originally designed for the Atlas II booster, comes in three different lengths, the original 9-meter high version, as well as fairings 10 meters (first flown on the AV-008/Astra 1KR launch) and 11 meters (seen on the AV-004/Inmarsat-4 F1 launch) high. Lockheed Martin had the 5.4-meter (4.57 meters usable) payload fairing for the Atlas V developed and built by RUAG Space (former Oerlikon Space) in Switzerland. The RUAG fairing uses carbon fiber composite construction, based on flight-proven hardware from the Ariane 5. Three configurations will be manufactured to support the Atlas V. The short (10-meter long) and medium (13-meter long) configurations will be used on the Atlas V 500 series. The 16-meter long configuration would be used on the Atlas V Heavy. The classic fairing covers only the payload, leaving the Centaur stage exposed to open air. The RUAG fairing encloses the Centaur stage as well as the payload.”
“The most powerful version of the Atlas V available launched […] from Space Launch Complex 41 at Cape Canaveral in Florida. The nearly 63 meter tall rocket with Russian powered RD 180 engine and five solid rocket motors boosted the Mobile User Objective System 5 (MUOS-5) satellite into orbit for the US Navy. MUOS provides vital communications and connectivity to armed forces around the globe. This was the fifth and final MUOS satellite to complete the first generation fleet.”
“The Mobile User Objective System (MUOS) is an Ultra High Frequency (UHF) (300 MHz to 3 GHz frequency range) SATCOM system, primarily serving the United States Department of Defense (DoD). International allies use is under consideration. The MUOS will replace the legacy UHF Follow-On (UFO) system before that system reaches its end of life to provide users with new capabilities and enhanced mobility, access, capacity, and quality of service. Intended primarily for mobile users (e.g. aerial and maritime platforms, ground vehicles, and dismounted soldiers), MUOS will extend users’ voice, data, and video communications beyond their lines-of-sight.
MUOS is an array of geosynchronous satellites that will provide global satellite communications (SATCOM) narrowband connectivity for communications use by the United States at data rates up to 384kbit/s. The program will deliver five satellites, four ground stations, and a terrestrial transport network at a cost of $7.34 billion USD.
The Navy’s Communications Satellite Program Office (PMW 146) of the Program Executive Office (PEO) for Space Systems in San Diego is lead developer for the MUOS Program. Lockheed Martin is the Prime System Contractor and satellite designer for MUOS under U.S Navy Contract N00039-04-C-2009, which was announced September 24, 2004. Key subcontractors include General Dynamics Mission Systems (Ground Transport architecture), Boeing (Legacy UFO and portions of the WCDMA payload) and Harris (deployable mesh reflectors).
The MUOS operates as a global cellular service provider to support the war fighter with modern cell phone-like capabilities, such as multimedia. It converts a commercial third generation (3G) Wideband Code Division Multiple Access (WCDMA) cellular phone system to a military UHF SATCOM radio system using geosynchronous satellites in place of cell towers. By operating in the UHF frequency band, a lower frequency band than that used by conventional terrestrial cellular networks, the MUOS provides warfighters with the tactical ability to communicate in “disadvantaged” environments, such as heavily forested regions where higher frequency signals would be unacceptably attenuated by the forest canopy. The MUOS constellation will consist of four operational satellites and one on-orbit spare. MUOS will provide military point-to-point and netted communication users with precedence-based and pre-emptive access to voice, data, video, or a mixture of voice and data services that span the globe. Connections may be set up on demand by users in the field, within seconds, and then released just as easily, freeing resources for other users. In alignment with more traditional military communications methods, pre-planned networks can also be established either permanently or per specific schedule using the MUOS’ ground-based Network Management Center.
In addition to the cellular MUOS WCDMA payload, a fully capable and separate UFO legacy payload is incorporated into each satellite. The “Legacy” payload extends the useful life of legacy UHF SATCOM terminals and enables a smoother transition to MUOS.”
“The Orbital ATK Cygnus cargo craft launched from the Cape Canaveral Air Force Station in Florida atop a United Launch Alliance Atlas 5 rocket March 22, carrying almost 7,500 pounds of food, supplies and science experiments for the six crew members aboard the International Space Station. Dubbed the “SS Rick Husband” in honor of the late commander of Columbia’s final flight, STS-107, that ended with Columbia’s breakup over Texas in February 2003.
The Orbital ATK Cygnus cargo craft […] arrived at the International Space Station March 26.”
“ULA plans an “incremental approach” to rolling out the vehicle and its technologies. Deployment will begin with the first stage, based on the Delta IV’s fuselage diameter and production process and is expected to use two BE-4 engines. Aerojet Rocketdyne’s AR-1 engine is being retained by ULA as a contingency option, with a final decision to be made in 2016. The first stage can have from zero to six solid rocket boosters (SRBs), and in the maximal configuration could launch a heavier payload than the highest-rated Atlas V, though still less than the Delta IV Heavy. A later feature is planned to make the first stage partly reusable. ULA plans to develop the technology to allow the engines to detach from the vehicle after cutoff, descend through the atmosphere with a heat shield and parachute, and finally be captured by a helicopter in mid-air. In April 2015, ULA estimated that reusing the engines would reduce the cost of the first stage propulsion by 90%, with propulsion being 65% of the total first stage build cost.
Initial configurations of Vulcan will use the same Centaur upper stage as the Atlas V, with its existing RL-10 engines. A later advanced cryogenic upper stage — called the Advanced Cryogenic Evolved Stage (ACES) — is conceptually planned for full development by ULA in the late 2010s. ACES would be LOX and liquid hydrogen (LH2) powered by one to four rocket engines yet to be selected. This upper stage will include the Integrated Vehicle Fluids technology that could allow long on-orbit life of the upper stage, measured in weeks rather than hours.”
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