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Sierra Nevada Corporation’s STPSat-5 satellite completes ground compatibility testing

(24 January 2018 - Sierra Nevada Corporation) Sierra Nevada Corporation’s (SNC) Space Test Program Mission 5 (STPSat-5) satellite moved another step closer to launch, successfully completing its Factory Compatibility Test (FCT) with NASA’s Near-Earth Network and the NASA Ames Multi-Mission Operations Center.

STPSat-5 hosts five Department of Defense (DoD) experiments to test emerging space technologies and is expected to launch in 2018. SNC completed mechanical integration in September, stacking three functional modules (propulsion, bus and payload deck) to form the complete space vehicle.

Completion of FCT demonstrates both radio frequency (RF) interfaces and end-to-end compatibility of the STPSat-5 space vehicle with the ground systems used for command and control once the vehicle is on-orbit.

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STPSat-5 satellite in SNC's Louisville, CO facility. (courtesy: Sierra Nevada Corporation)

“Completing FCT is an important milestone for the STPSat-5 program. This test demonstrated the ability of NASA’s ground systems to communicate with the spacecraft, command it and receive telemetry – verifying critical mission interfaces,” said Pat Remias, senior director of programs for SNC’s Space Systems business area. “We look forward to the next steps to get STPSat-5 into space and provide important data to the DoD,”

With successful completion of the FCT, the space vehicle is proceeding into final system-level functional and environmental testing, including random vibration and thermal vacuum, prior to its shipment to the launch site.

The STPSat-5 payloads are provided by Space and Naval Warfare Systems Command, the U.S. Air Force Academy, the Naval Research Laboratory, and the Air Force Research Laboratory. As the prime contractor, SNC designed and built the STPSat-5 spacecraft and integrated the government payloads.

STPSat-5 is the first mission to fly SNC’s versatile SN-50 bus, which has both Low-Earth Orbit and Geosynchronous-Earth Orbit capabilities. The vehicle is fully compatible with the standard Evolved Expendable Launch Vehicle (EELV) Secondary Payload Adapter and is an ideal choice for a variety of operational, technology demonstration, and science missions.

About Sierra Nevada Corporation

Sierra Nevada Corporation (SNC) is a trusted leader in solving the world’s toughest challenges through advanced engineering technologies in Space Systems, Commercial Solutions, and Defense and National Security. Honored as one of the most innovative U.S. companies in space, SNC’s Space Systems business area designs and manufactures advanced spacecraft and satellite solutions, space habitats and environmental systems, propulsion systems, precision space mechanisms and subsystems, and SNC’s celebrated Dream Chaser spacecraft. With more than 25 years of space heritage working with the U.S. government, commercial customers, and the international market, SNC has participated in more than 450 successful space missions and delivered 4,000+ systems, subsystems and components around the world.