The short version
- NASA engineers have finished testing a small satellite that combines chemical and electric propulsion systems using one non-toxic fuel source.
- The mission aims to demonstrate how unified propulsion can save mass and volume, allowing for more scientific instruments or cheaper launch vehicles.
- The spacecraft is scheduled to launch no earlier than October 1 on a SpaceX Falcon 9 rocket from California.
NASA has completed a series of critical environmental and physical tests on a new small satellite designed to revolutionize how spacecraft navigate in orbit. The mission, known as ASCENT Propulsion Dual Mode, represents a shift away from traditional propulsion methods that rely on separate, bulky systems for different types of maneuvering. By integrating high-thrust chemical engines with low-thrust electric thrusters into a single unit fed by one common fuel tank, the spacecraft aims to make spaceflight safer and more efficient.
Traditional spacecraft typically carry two distinct propulsion systems: a chemical system for rapid movements such as entering orbit, and an electric system for slow, highly efficient maneuvers like maintaining position. This dual-system approach requires multiple fuel tanks and extensive plumbing, which consumes valuable mass and volume on the vehicle. The ASCENT mission seeks to eliminate this redundancy by using a single non-toxic propellant to power both engine types, thereby freeing up space for additional scientific instruments or enabling launches on smaller, less expensive rockets.
The development of this technology required a collaborative effort across several institutions. While NASA’s Marshall Space Flight Center in Huntsville, Alabama, manages the mission, the spacecraft incorporates components from multiple partners. The Massachusetts Institute of Technology developed the electrospray thrusters, Plasma Processes built the chemical propulsion module, and the Georgia Institute of Technology integrated the spacecraft bus. This distributed model highlights the complexity of ensuring functionality across different teams while maintaining a unified design.
Before deployment, the flight hardware underwent rigorous testing at Marshall’s Small Spacecraft Servicing and Integration Lab to verify its integrity in the harsh conditions of low Earth orbit. Engineers conducted extensive leak tests using pressurized helium inside a vacuum chamber to ensure that all seals on the shared fuel lines and valves were secure. Because the system relies on a single tank feeding two different thruster types, preventing leaks is vital for both mission success and safety.
The spacecraft also faced thermal vacuum testing to simulate the extreme temperature swings and lack of air found in space. This process confirmed that the electronics, thrusters, and mechanical systems would operate normally once deployed. Additionally, a spin test was performed to measure the spacecraft’s mass properties and center of gravity. Ensuring the vehicle is perfectly balanced is essential for stable flight, allowing antennas to maintain communication with Earth and solar panels to accurately capture sunlight.
With these environmental and physical checks now complete, the mission is entering its final preparation phase. The engineering team will conduct final system checkouts and integrate the spacecraft’s solar arrays before shipping the hardware to its launch site. Nehemiah Williams, the project manager at NASA Marshall, noted that while there are many small challenges in coordinating such a complex system, ensuring the functionality of the propulsion unit across all partner teams is key to the mission's success.
The ASCENT Propulsion Dual Mode mission is manifested to launch no earlier than October 1 aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base in California. Once deployed into an orbit approximately 325 miles above Earth, the spacecraft will begin a nine-month operational period. After an initial checkout phase, the operations team will execute short maneuvers using both chemical and electric engines to validate the dual-mode concept.
If the initial tests prove successful, the spacecraft will spend several months performing multiple orbit-raising and lowering maneuvers. These activities will alternate between the high-thrust and low-thrust engines, providing real-world data on the viability of unified propulsion systems. The mission is managed and funded by NASA’s Small Spacecraft & Distributed Systems division within the Research and Technology Mission Directorate, based at Ames Research Center in California.
This demonstration marks a significant step toward modernizing spacecraft design. By reducing the mass and volume dedicated to propulsion, future missions could achieve greater efficiency and flexibility. The success of the ASCENT mission could influence how subsequent satellites are built, potentially lowering costs and expanding the capabilities of small spacecraft in low Earth orbit.
Sources behind this briefing
Go to the original reporting
- NASA↗NASA Tests Dual Mode Propulsion CubeSat Ahead of Launch
