National Security
Mission Systems for National Security Space
Sierra Space designs, integrates, and delivers spacecraft and mission systems for increasingly complex, contested, and high-consequence operating environments.

Approach
From mission need to mission-ready capability
Space companies now have a profound responsibility to help lead the way in an entirely new era for National Security Space. Sierra Space brings spacecraft platforms, mission integration, enabling technologies, operations experience, and production infrastructure to that responsibility.
Architectures
Mission-tailored architectures
Sierra Space is developing a next-generation product line of small, high-performance satellites designed for on-orbit servicing missions. Missions begin with an operational requirement; platform, payload interfaces, subsystems, and mission support must fit that requirement. The Sierra Space Eclipse™ portfolio includes the Horizon, Velocity and Titan classes.
- Configurable platforms
- Spacecraft buses configured around the mission environment rather than a fixed product specification
- Open payload interfaces
- Payload accommodation designed to carry customer sensors and mission equipment
- Multi-orbit support
- Mission designs that address different orbital regimes and operating conditions
- System integration
- Spacecraft, subsystem and payload integration handled inside one engineering organization
- Qualification
- Environmental testing and mission assurance carried through to delivery

Integration
Integration across the mission
An integrated approach provides continuity, with fewer handoffs between the spacecraft, the payload, and the operating environment.
Step 1
Architecture
Mission need, orbit, payload and concept definition
Step 2
Configuration
Platform, subsystem and interface selection
Step 3
Production
Manufacturing and assembly of flight hardware
Step 4
Qualification
Environmental test, verification and mission assurance
Step 5
Launch integration
Vehicle accommodation and pre-flight support
Step 6
Operations
Mission operations and on-orbit support
Resilience
Built for resilience
National security missions demand architectures that adapt as threats, timelines, and orbital conditions change.

Platforms
Eclipse satellite platforms
Horizon, Velocity, and Titan address distinct mission needs across warning and tracking, space control, orbital mobility, and logistics. The family structure gives customers a configurable foundation that keeps the mission and the spacecraft together.
Enabling technologies
The systems beneath the mission
Spacecraft performance depends on the hardware underneath it. Sierra Space develops power, pointing, motion control, propulsion, thermal, environmental, mechanical, and life-support technologies for demanding applications.

Questions
National Security FAQs
- What national security space capabilities does Sierra Space provide?
- Spacecraft platforms, mission integration, production, testing, mission operations and the enabling space technologies that support high-consequence national security missions.
- Does Sierra Space support multi-orbit missions?
- Yes. Sierra Space develops configurable spacecraft and supporting systems for missions across multiple orbital environments. The architecture and mission profile follow the customer requirement.
- Can Sierra Space integrate customer payloads?
- Yes. Payload accommodation and integration are part of mission-tailored spacecraft and mission planning. Program specifics are handled through direct engagement.
Program participation, contract detail, and mission specifics are handled through direct engagement with the Sierra Space national security team.