USSCR Rack Credit: NASA
SN, TDRS, NSN, ACCESS 

Space Network Completes CDR of USS-CR

January 20, 2017

This blog post was written prior to a reorganization of ESC’s projects and networks in support of the agency’s commercialization effort. Though accurate at the time of publication, it is no longer being updated and may contain broken links or outdated information. For more information about the reorganization, click here.

GREENBELT, MD --- NASA's Space Network recently completed the Critical Design Review (CDR) of the User Service Subsystem Component Replacement (USSCR) Project, bringing focus to the progress of one of the longest development activities of the product. The CDR presentation provided a detailed description that displayed the maturity of functional and interface designs.

"My opinion of the CDR is that it was very successful.  The team has overcome significant challenges in working together and making the system work." says Pat Boldosser, USSCR Deputy Product Manager at NASA's Goddard Space Flight Center, Greenbelt, Md. "Successfully completing a two day review with only five action items shows the depth and breadth of the team's understanding of the system design and the work ahead."

USSCR's main focus deals with the replacement of key USSCR Rackcomponents that process user signals within the TDRS ground terminals at the White Sands Complex in New Mexico.  New modems, frequency converters, switchgear, and a monitor and control system are being provided to update Space Ground Link Terminals currently in use at White Sands.   Since the CDR, testing and installation has begun and training for contractors has been scheduled.

Based at Goddard Space Flight Center, the Space Network provides geosynchronous communication services and management of the Tracking and Data Relay Satellites (TDRS) and associated ground terminal stations.  Three new TDRS spacecraft (K, L, and M) will be added to the fleet over the new few years.

In addition, the Space Network Ground Segment Sustainment (SGSS) project will provide an upgrade of all existing ground system technology to maintain long-term operations. The goal of USSCR is to modernize equipment that is currently active and then provide backups so that hardware can stay functional until SGSS is complete.

NASA's Space Network is the responsibility of the Space Communications and Navigation (SCaN) office within the Human Exploration and Operations (HEO) Mission Directorate at NASA Headquarters in Washington D.C.