The United States Naval Research Laboratory (NRL) has announced the successful launch of three ‘advanced experimental payloads’ into space aboard the Department of War (DoW) Space Test Program’s (STP) Satellite-7 mission.
According to an NRL statement, the STPSat-7 spacecraft’s launch, which uses a Northrop Grumman Minotaur IV launch vehicle, occurred at approximately 4:33 a.m. PDT on Tuesday, April 7, from Vandenberg U.S. Space Force (USSF) Base in California.
Lab officials said the successful launch of the STP-S29A mission marks “a significant step forward in advancing U.S. space-based capabilities for the U.S. Navy and national security.”
Advanced Experimental Payloads Ensure ‘U.S. Maintains its Technological Advantage’
According to the same statement, the three experimental payloads included the Lasersheet Anomaly Resolution and Debris Observation (LARADO) instrument, the Global Navigation Satellite System (GNSS) Orbiting Situational Awareness Sensor (GOSAS), and the Gadolinium Aluminum Gallium Garnet (GAGG) Radiation Instrument (GARI-1C).
LARADO: Tracking Dangerous Space Debris
Andrew Nicholas, NRL Sensor Development and Applications Section Head and LARADO principal investigator, said that the first of the USNRL’s advanced experimental payloads, which is designed to address the threat of orbital debris from rocket boosters, defunct zombie satellites, and other manmade objects in low Earth orbit, “is the next step in ensuring situational awareness in space.”
Equipped with a suite of sensors, LARADO will detect and characterize the smaller pieces of orbital debris that have proven virtually impossible to detect and track from ground observations alone. Smaller debris traveling at nearly 18,000 miles per hour regularly impacts and damages other satellites, while larger pieces have periodically forced astronauts aboard the International Space Station to change their orbit to avoid a potentially catastrophic collision.
Nicholas said that tracking these damaging yet elusive pieces of smaller space debris is “vital to understanding the space environment.” The scientist also noted that the ability to test LARADO in space “will provide essential data to update orbital debris models.”
“These updates are important to the orbital debris research community, engineers designing spacecraft to survive and minimize growth of the debris environment, satellite operators, and policy makers,” Nicholas explained.
GOSAS: Improving the Reliability of Communication and Navigation
The second of the USNRL’s advanced experimental payloads, GOSAS, is designed to improve the reliability of navigation and communication systems that warfighters rely upon.
A follow-on to the NRL’s GROUP-C (GPS Radio Occultation and Ultraviolet Photometry-Collocated) experiment on the International Space Station, GOSAS’ mission directive includes predicting space weather conditions to protect critical assets, such as GPS and communication satellites, operating in the extreme environment of space.
According to Scott Budzien, Ph.D., NRL research physicist and GOSAS principal investigator, GOSAS is a dual GPS receiver “designed to characterize the orbital GNSS environment and produce high-quality ionospheric space weather products.” The investigator also noted that GOSAS is “CubeSat-compatible,” further enhancing the advanced experimental payload’s versatility.
“Understanding and predicting space weather is critical for ensuring the accuracy of GPS and the integrity of military communications.”
GARI-1C: Monitoring Gamma Ray from Weapons of Mass Destruction
Perhaps the most sensitive and most critical advanced experimental payload launched on Tuesday was the NRL’s GARI-1C gamma ray detector. Unlike astronomical satellites capable of deep space gamma-ray observations, the team said that GARI-1C will “pave the way for future defense applications from space” by monitoring Earth for signs of a nuclear explosion.
Lee Mitchell, Ph.D., NRL Research Physicist and GARI-1C principal investigator, noted that GARI-1C will ‘space-qualify’ a space quality gamma ray detector that was specifically designed to operate in the extreme environment of space. The team noted that, since most off-the-shelf components are not radiation-hardened, understanding how they respond to the extreme radiation they will encounter in space is “critical for future operational use.”
Along with its critical primary mission, Mitchell also noted that GARI-1C offers improvements in energy resolution and power consumption. The investigator also noted the advanced experimental payload’s reduced size compared to similar systems, which is “key to developing more advanced and efficient sensors for detecting threats from orbit.”
“Fundamental to Preserving America’s Strategic Edge in Space”
When discussing the successful launch of the STP-S29A mission and its trio of advanced experimental payloads, United States Space Force (USSF) Lt. Col. Brian Shimek, a system program manager and director for STP, highlighted the collaboration between the NRL and the DoW’s Space Test Program.
“The success of this mission…highlights how cutting-edge research and development are fundamental to preserving America’s strategic edge in space,” Lt. Col. Shimek explained.
When addressing the overall implications of the three test platforms, the team from the NRL’s Space Science Division, which regularly experiments with defense technologies spanning solar-terrestrial physics, astrophysics, upper- and middle-atmospheric science, and astronomy, noted the need to continue advancing defense technologies to address evolving threats.
“By improving understanding of the space environment and testing next-generation satellite technologies, NRL is ensuring the United States maintains its technological advantage and protects critical assets in orbit,” the team explained.
Christopher Plain is a Science Fiction and Fantasy novelist and Head Science Writer at The Debrief. Follow and connect with him on X, learn about his books at plainfiction.com, or email him directly at christopher@thedebrief.org.