STGT

General Dynamics has completed initial integration and testing of Nasa space network ground segment sustainment (SGSS) programme’s command and control infrastructure in Arizona, US.

The Increment A3, the bearer network and basic ground terminal hardware and software were tested at General Dynamics’ SGSS development and test laboratory.

The increment will facilitate Nasa to receive and transmit mission data across the space network. It also includes telemetry and control for tracking and data relay satellite system (TDRSS) second-generation satellites.

Managed by Nasa’s Goddard Space Flight Center, SGSS is a digital ground system that will replace analogue radios and communications equipment.

The ground system architecture will ensure continuous global space-to-ground telecommunications and tracking coverage from space network over Earth orbit and near-Earth space flight missions.

General Dynamics Mission Systems president Chris Marzilli said: "The new SGSS lab provides Nasa with an extremely efficient and cost-effective path to Space Network ground system modernisation.

"Testing all of the SGSS ground system elements in the ‘real-life’ ground station environment will also streamline the integration of the new digital system as it replaces the legacy Space Network system that is decades old."

The next SGSS increment, Increment A4, is the functional ground terminal space network operations centre. It is on track to proceed into the system integration and testing phase at the Scottsdale lab.

With the Increment A4, tracking, telemetry and control for TDRSS generation one and three satellites will be completed, as well as high data rate communication relay modes and remaining capability for a fully functional ground terminal.

The new SGSS system will operate from the White Sands Complex in New Mexico, and TDRSS Ground Terminals in Guam and Blossom Point, Maryland.

It can be enhanced by accommodating larger quantities of data and higher data rates, which will support future space missions.

For the project, General Dynamics is working with Harris, MetiSpace Technologies, Rincon Research Corporation, a.i. Solutions, RT Logic and Qwaltec.

Image: The SGSS is designed to ensure continuous global space-to-ground telecommunications and tracking coverage from space network over Earth orbit and near-Earth space flight missions. Photo: courtesy of Nasa.