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GAO-13-747R 1 (2013-07-25)

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GAOU.S. GOVERNMENT ACCOUNTABILITY OFFICE
441 G St. N.W.
Washington, DC 20548


July 25, 2013

Congressional Committees

Missile Defense: Precision Tracking Space System Evaluation of Alternatives

The Missile Defense Agency's Precision Tracking Space System (PTSS) is intended to be a
satellite system equipped with infrared sensors that track ballistic missiles through their emitted
heat. The planned satellite system includes a constellation of nine satellites in orbit at the same
time around the earth's equator. In April 2013, the Department of Defense (DOD) officially
proposed canceling the PTSS program because of concerns with the program's high-risk
acquisition strategy and long-term affordability.

The National Defense Authorization Act for Fiscal Year 2013 (NDAA), signed into law on
January 2, 2013, mandated, among other things, that DOD's Director of Cost Assessment and
Program Evaluation (CAPE) conduct an evaluation of PTSS alternatives and report it to the
congressional defense committees no later than April 30, 2013.1 The act also limited the use of
funds made available for fiscal year 2013 for PTSS until (1) DOD submitted to the congressional
defense committees a formal plan for the evaluation of PTSS alternatives-called a terms of
reference-that had been approved by the Missile Defense Executive Board in coordination with
the Defense Space Council,2 and (2) CAPE completed the evaluation of alternatives.

Additionally, the act mandated that GAO assess the PTSS terms of reference and evaluation of
alternatives, and then both brief and report our assessment to the defense committees.3 To
meet the requirements of the mandate, we assessed the extent to which (1) the terms of
reference submitted by DOD addressed an evaluation of alternatives, and (2) the PTSS report
submitted by DOD included an evaluation of alternatives. We offered to brief the defense
committees in early June 2013, and we are now issuing this final report.

To conduct this work, we reviewed both the terms of reference and the PTSS report to
determine whether they provided for and assessed alternative systems and concepts, as well as
to determine whether internal agency coordination occurred consistent with the restrictions and
requirements for the PTSS program in the Fiscal Year 2013 NDAA. We also interviewed DOD
officials from CAPE; Office of the Under Secretary of Defense for Acquisition, Technology and
Logistics; Missile Defense Agency; U.S. Strategic Command; and Joint Staff.

We conducted this performance audit from May 2013 through July 2013 in accordance with
generally accepted government auditing standards. Those standards require that we plan and

1Pub. L. No. 112-239, § 224.
2Both the Missile Defense Executive Board and Defense Space Council are senior-level DOD advisory groups for,
respectively, missile defense and space matters.
3Specifically, the act mandated GAO to brief the defense committees on the terms of reference and their
conformance with best practices for analyses of alternatives as well as GAO's views of the evaluation itself. Final
reports were to be completed as soon as practicable after the briefing. As DOD did not address an evaluation of
alternatives in the terms of reference, we did not assess their conformance with best practices.


GAO-13-747R Precision Tracking Space System

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