The GPS provides positioning, navigation, and timing (PNT) data to users worldwide. The U.S. Air Force (AF) is in the process of modernizing the system. But, it is uncertain whether the AF could acquire new satellites in time to maintain GPS service without interruption. This report assesses: (1) the status of AF efforts to deliver new GPS satellites, the avail. of the GPS constellation, and the potential impacts on users if the constellation avail. diminishes below its committed level of performance; (2) efforts to acquire the GPS ground control and user equipment necessary to leverage GPS satellite capabilities; (3) the GPS interagency requirements process; and (4) coord. of GPS efforts with the internat. PNT community. Illus. This is a print on demand report.
The Global Positioning System (GPS), which provides position, navigation, and timing data to users worldwide, has become essential to U.S. national security and a key tool in an expanding array of public service and commercial applications. The Air Force is in the process of modernizing GPS. In light of the importance of GPS, the modernization effort, and international efforts to develop new systems, the auditor undertook a broad review of GPS. Specifically, she assessed progress in: (1) acquiring GPS satellites; (2) acquiring the ground control and user equipment necessary to leverage GPS satellite capabilities; and (3) evaluated coordination among fed. agencies and other org. to ensure GPS missions can be accomplished. Illus.
Air Force Space Command (AFSPC) needs quantitative tools to assist it in making decisions on how changes in the dollars invested in maintenance and sustainment of the ground segment of space systems affect the operational performance of those systems. This monograph outlines criteria for analyzing how sustainment investments affect the operational performance of space systems, focusing on the Global Positioning System. The authors offer a framework for such analyses and recommend steps to implement that framework. The authors describe the Global Positioning System at a level of detail needed for the analysis; discuss how to approach modeling the relationships between sustainment activities and overall system performance, and describe a pilot model for such analysis; and the authors examine the results of this model and how they might be used in policy analysis, and discuss the implications for developing such models in GPS and other programs. The authors selected a metric of performance that reflects the overall system performance, and not one that focuses on the performance of a specific subsystem.
The majority of large-scale acquisition programs in the DoD space portfolio have experienced problems during the past two decades that have driven up costs by billions of dollars, stretched schedules by years, and increased technical risks. To address the cost increases, DoD altered its acquisitions by reducing the number of satellites it intended to buy, reducing the capabilities of the satellites, or terminating major space systems acquisitions. Many space acquisitions are experiencing significant schedule delays resulting in potential capability gaps in areas such as missile warning, military commun., and weather monitoring. This testimony focuses on: the status of space acquisitions; factors of acquisition problems; and efforts to improve acquisitions. Illus.
The DoD has had long-standing difficulties developing and delivering space systems on time and within budget. Attempts to reform DoD space acquisitions in the past have sought to leverage commercial approaches or rely more on the commercial sector to meet DoD needs. This report examined the following questions: (1) What are the differences between commercial and national security space system missions, requirements, and technology development? (2) What acquisition practices adopted by commercial co¿s. could be used for national security space system acquisitions? (3) Which acquisition practices adopted by commercial co¿s. may not be readily adaptable for national security space system acquisitions? Charts and tables.
The majority of large-scale acquisition programs in the DoD space portfolio have experienced problems during the past two decades that have driven up cost and schedules and increased technical risks. The cost resulting from acquisition problems has resulted in cancellations of programs that were expected to require investments of tens of billions of dollars. Many programs are experiencing significant schedule delays resulting in potential capability gaps in areas such as positioning, navigation, and timing; missile warning; and weather monitoring. This testimony focuses on: (1) the condition of space acquisitions; (2) causal factors; and (3) recommend. for better positioning programs and industry for success. Charts and tables.
The DoD plans to spend $27 billion acquiring launch services through the Evolved Expendable Launch Vehicle (EELV) program over the next 12 years. It uses 2 families of commercially owned and operated vehicles to launch satellites. The EELV program has undergone significant changes, including: adoption of a new acquisition strategy that sought to ensure the viability of the two EELV launch vehicle providers, Boeing and Lockheed Martin; the subsequent decision by those two co. to form a joint venture, the ULA; and a 10-year increase in the life of the program. This report: determines what uncertainties DoD faces in the EELV program and in the transition to ULA; and assesses how DoD is positioned to manage and oversee the effort. Illustrations.
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