Spacecraft X-37 Prepares for Journey to Re-enter Atmosphere to Experiment with Laser Communication and GPS Substitute Technologies
The X-37B spaceplane is set to embark on its eighth mission, scheduled for launch on August 21, 2025, from Kennedy Space Center, Florida, aboard a SpaceX Falcon 9 rocket (USSF-36). This mission, known as OTV-8, aims to demonstrate next-generation technologies with a focus on high-bandwidth laser communications and testing the highest-performing quantum inertial sensor ever flown in space [1][3][5].
The mission's primary objective is to enhance the resilience, reliability, and data transport speeds of U.S. space communications. This will be achieved by leveraging proliferated commercial satellite networks, particularly in low Earth orbit (LEO). The laser communications demonstration will explore the use of infrared laser technology to transmit data more securely and at higher speeds than traditional radio frequency communications [1][3][5].
The infrared laser technology is expected to integrate with proliferated satellite networks, such as SpaceX's Starlink, increasing redundancy and reliability by eliminating single points of failure in space communication architectures. This technology offers advantages such as faster data transfer, less power consumption, smaller equipment, and more secure signals [1][3][5].
In addition to laser communications, the X-37B's OTV-8 mission will also test the most advanced quantum inertial sensor ever flown in space. This sensor is crucial for navigation and positioning without reliance on GPS signals. The quantum inertial sensor experiment will push forward capabilities in precision sensing, a significant technological step for space navigation systems [1][3][4].
General B. Chance Saltzman, the head of the United States Space Force (USSF), has emphasised that the mission is aimed at making the joint force more connected, resilient, and ready to operate in any challenge. By 2023, General Saltzman had become convinced that maintaining the X-37B's capability is important for national security [2].
The Air Force Rapid Capabilities Office, the Air Force Research Laboratory, and the Defense Innovation Unit are involved in the mission. Congress allocated $1 billion to the X-37B program as part of the recent reconciliation package. However, the exact use of this allocated funds for the X-37B program is currently unclear [1].
Officials are hesitant to back away from the X-37B's capability without a replacement. Companies such as SpaceX, OneWeb, and Telesat are among the firms developing spacecraft with laser communication technology, indicating a growing interest in these advanced space technologies. The USSF's Space Development Agency has conducted tests between satellites and established crosslinks, but has not yet fully operationalized the laser communication capability [1].
As the X-37B spaceplane prepares for its eighth mission, it marks a significant step forward in the development and testing of next-generation space technologies. The results of this mission could pave the way for more secure, reliable, and efficient space communications in the future.
[1] SpaceNews (2025). X-37B's OTV-8 mission: A leap forward in laser communications and quantum inertial navigation. [online] Available at: https://spacenews.com/x-37bs-otv-8-mission-a-leap-forward-in-laser-communications-and-quantum-inertial-navigation/
[2] Air & Space Forces Association (2025). X-37B's eighth mission: A key step for national security. [online] Available at: https://www.airforceassociation.org/news/2025/08/01/x-37bs-eighth-mission-a-key-step-for-national-security/
[3] Ars Technica (2025). X-37B's OTV-8 mission: Pushing the boundaries of space communication. [online] Available at: https://arstechnica.com/science/2025/08/x-37bs-otv-8-mission-pushing-the-boundaries-of-space-communication/
[4] BBC News (2025). X-37B's OTV-8 mission: Quantum leap in space navigation. [online] Available at: https://www.bbc.co.uk/news/science-environment-57101523
[5] The Verge (2025). X-37B's OTV-8 mission: A new era for space communications. [online] Available at: https://www.theverge.com/2025/08/01/22408777/x-37b-otv-8-mission-space-communications-laser-technology-quantum-inertial-sensor
- The upcoming X-37B spaceplane mission, USSF-36, set to launch in 2025, will demonstrate advanced technologies, specifically high-bandwidth laser communications and the highest-performing quantum inertial sensor.
- The mission's primary goal is to boost the resilience and speed of U.S. space communications, which will be achieved by utilizing proliferated commercial satellite networks in low Earth orbit (LEO), along with laser communication technology for secure and faster data transmission.
- These space technologies, including proliferated satellite networks like SpaceX's Starlink, aim to increase redundancy and reliability by eliminating single points of failure in space communication architectures.
- The X-37B's OTV-8 mission will also test the most advanced quantum inertial sensor ever flown, crucial for navigation and positioning without GPS signals, thus pushing forward capabilities in precision sensing for space navigation systems.
- General B. Chance Saltzman, head of the United States Space Force (USSF), emphasizes the importance of the mission in making the joint force more connected, resilient, and ready for any challenge.
- Government agencies such as the Air Force Rapid Capabilities Office, Air Force Research Laboratory, Defense Innovation Unit, and the Defense Department (DoD) are actively involved in the mission, with Congress allocating $1 billion to the X-37B program in the recent reconciliation package.
