The U.S. Missile Defense Agency (MDA) on April 9 will hold an industry day to unveil details about its planned operational missile-tracking satellite constellation, according to an April 1 posting on the Federal Business Opportunities Web site.

The MDA announced plans to build the Precision Tracking Space System (PTSS) more than a year ago, but details have been scant. Congress for several years rebuffed the MDAโ€™s requests to begin building an operational constellation before two demonstration satellites built under a program called Space Tracking and Surveillance System were launched. Those satellites were launched last fall.

U.S. Army Lt. Gen. Patrick Oโ€™Reilly, the MDAโ€™s director, has said the agency will hold an open competition to build PTSS, and the satellites will be smaller than the 1,125-kilogram Space Tracking and Surveillance System craft that were built by Northrop Grumman.

The industry day will be held at the National Conference Center in Lansdowne, Va.