Tag Archives: GSSAP

Space Force-8 Mission

Two Northrop Grumman Corporation Geosynchronous Space Situational Awareness Program (GSSAP) satellites were successfully launched into orbit on a United Launch Alliance (ULA) Atlas V rocket on January 21, 2022 from Cape Canaveral Space Force Station as part of the U.S. Space Force (USSF)-8 mission. The two satellites, GSSAP-5 and GSSAP-6, will enhance space situational awareness, a top priority for the U.S. Space Force. In addition to manufacturing and delivering both GSSAP payloads, Northrop Grumman also provided the sole strap-on solid rocket booster adding propulsion to the rocket launch, as well as essential aeronautical components in support of the USSF-8 launch.

GSSAP
Northrop Grumman-built GSSAP satellites collect space situational awareness data allowing for more accurate tracking and characterization of man-made orbiting objects

The GSSAP program delivers a space-based capability operating in a near-Geosynchronous Earth Orbit (GEO), in support of the U.S. Space Command space surveillance operations. GSSAP satellites allow for more accurate tracking and characterization of orbiting objects and uniquely contribute to timely and precise orbital predictions, enhancing knowledge of the GEO environment and improving spaceflight safety. Northrop Grumman has manufactured all GSSAP satellites since the program’s inception in 2011.

«For over a decade, Northrop Grumman has delivered products that improve U.S. Space Command’s ability to monitor human-made orbiting objects in the geosynchronous environment», said Matt Verock, vice president, space security, Northrop Grumman. «As dedicated Space Surveillance Network (SSN) sensors, the capabilities our GSSAP satellites bring demonstrate our leadership in space domain awareness».

The company’s facilities in Dulles, Virginia along with Goleta and San Diego, California, and Beltsville, Maryland provided numerous subsystems, including the satellite’s solar arrays, primary structure, thermal control, avionic boxes, flight computer, shunt regulator assembly, composite components and deployable structures.

This was the third ULA Atlas V rocket launch supported by Northrop Grumman’s 63-inch-diameter Graphite Epoxy Motor (GEM 63). The GEM 63 solid rocket booster, manufactured at the company’s Magna, Utah facility, provided nearly a third of the total thrust at liftoff. The GEM family of solid rocket motors recently expanded with the development of the GEM 63XL variation to support ULA’s Vulcan Centaur launch vehicle, scheduled for its first flight later this year.

The company manufactured the Atlas V rocket’s reaction control system propellant tanks at its Commerce, California, facility, and eight retro motors at its Elkton, Maryland, facility that assist first and second stage separation. Using advanced fiber placement manufacturing and automated inspection techniques, Northrop Grumman produced the composite heat shield that provides essential protection to the Atlas V first-stage engine, the Centaur Interstage Adapter that houses the second-stage engine, and the broadtail that adapts from the core vehicle to the five-meter diameter fairing. Northrop Grumman fabricated these structures at its Iuka, Mississippi, facility.

Northrop Grumman is a technology company, focused on global security and human discovery. Our pioneering solutions equip our customers with capabilities they need to connect, advance and protect the U.S. and its allies. Driven by a shared purpose to solve our customers’ toughest problems, our 90,000 employees define possible every day.

Situational awareness

The 1st Space Operations Squadron (1 SOPS) at Schriever Air Force Base (AFB), Colorado, accepted two new satellites into operation September 12 to expand their Geosynchronous Space Situational Awareness Program’s (GSSAP) ability to characterize and track objects in space to support a neighborhood watch out in orbit.

GSSAP artist rendering
GSSAP artist rendering

GSSAP provides enhanced space-based space situational awareness to improve the ability to rapidly detect, warn, characterize and attribute disturbances to space systems in the geosynchronous environment. This assists in the protection of the assets in space that affect many facets of daily life such as navigation and communication. GSSAP supports U.S. Strategic Command’s ability to collect data on man-made orbiting objects.

GSSAP became operational in September 2015, when the first two GSSAP satellites reached their Initial Operational Capability. The two newest satellites to the program, GSSAP 3 and 4, were launched into orbit August 19, 2016, and have now finished their testing phase.

«GSSAP 3 and 4 will significantly enhance our ability to characterize objects on geosynchronous orbit», said General Jay Raymond, commander of Air Force Space Command. «This provides the awareness we need to successfully operate in space».

This addition to GSSAP is vital to expand 1 SOPS’s space-based space situational awareness mission. It not only provides a significant improvement in space object characterization, but also in detecting threats. Because of its near-geosynchronous orbit, it has a clear and distinct vantage point to avoid the weather interruptions that can limit ground-based space surveillance systems.

The GSSAP satellite system can characterize objects in space to a very refined level. Being able to discriminate and characterize objects assists the U.S. and its allies in achieving responsible and safe use of space. The information obtained by this program provides robust spaceflight safety information and ensures free access to, and use of, space.

As space continues to become more congested and contested, GSSAP and other space situational awareness programs are paramount in deterring aggressive action in space. GSSAP continues to enable safe operations and protects U.S. and allied spacecraft by providing timely and accurate situational awareness. Ultimately, GSSAP and 1 SOPS enable a range of decisive responses that will render any counter-space threats ineffective.

Surveillance Network

A United Launch Alliance (ULA) Delta IV rocket carrying the AFSPC-6 mission for the United States Air Force lifted off from Space Launch Complex-37 August 19 at 12:52 a.m. EDT. This is ULA’s seventh launch in 2016 and the 110th successful launch since the company was formed in December 2006.

ULA's Delta IV rocket lifts off with the AFSPC-6 mission for the United States Air Force
ULA’s Delta IV rocket lifts off with the AFSPC-6 mission for the United States Air Force

«Thank you to the ULA, Air Force and industry partners for the outstanding teamwork and flawless execution that made today’s mission a success», said Laura Maginnis, ULA vice president of Custom Services. «This morning’s AFSPC-6 launch is a prime example of why our customers continue to place their trust us to launch our nation’s crucial space capabilities».

This mission was launched aboard a Delta IV Medium+ (4,2) configuration Evolved Expendable Launch Vehicle (EELV) powered by one common booster core. The common booster core was powered by an RS-68A liquid hydrogen/liquid oxygen engine producing 702,000 pounds/ 318,422 kg of thrust. A single RL10B liquid hydrogen/liquid oxygen engine powered the second stage. The booster and upper stage engines are both built by Aerojet Rocketdyne. ULA constructed the Delta IV Medium+ (4,2) launch vehicle in Decatur, Alabama.

The AFSPC-6 mission consists of twin Geosynchronous Space Situational Awareness Program (GSSAP) spacecraft, built by Orbital ATK. The new satellites will join the first two GSSAP spacecraft launched approximately two years ago aboard a Delta IV launch vehicle. GSSAP is a space-based capability that collects space situational awareness data, allowing for more accurate tracking and characterization of man-made orbiting objects. It has a clear, unobstructed, and distinct vantage point for viewing resident space objects orbiting earth in a near-geosynchronous orbit without the weather or atmosphere disruptions that limit ground-based observations. The data from GSSAP greatly improves our ability to rapidly detect, warn, characterize and attribute disturbances to space systems in the geosynchronous environment.

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
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

ULA’s next launch is the Atlas V OSIRIS-REx spacecraft for NASA. The launch is scheduled for September 8 from Space Launch Complex-41 at Cape Canaveral Air Force Station, Florida.

The EELV program was established by the U.S. Air Force to provide assured access to space for Department of Defense (DoD) and other government payloads. The commercially developed EELV program supports the full range of government mission requirements, while delivering on schedule and providing significant cost savings over the heritage launch systems.

With more than a century of combined heritage, United Launch Alliance is the nation’s most experienced and reliable launch service provider. ULA has successfully delivered more than 100 satellites to orbit that provide critical capabilities for troops in the field, aid meteorologists in tracking severe weather, enable personal device-based GPS navigation and unlock the mysteries of our solar system.

Delta IV AFSPC-6 Launch Highlights

In preparation for launch, the Mobile Service Tower is rolled back from a Delta IV rocket carrying the AFSPC-6 mission
In preparation for launch, the Mobile Service Tower is rolled back from a Delta IV rocket carrying the AFSPC-6 mission