An experimental investigation into the effects of shock/wake and shock/flame interaction on the base pressure of axisymmetric bodies at Mach 2 has been carried out. This investigation has determined the effects of various forms of shock generator (axisymmetric cowls, twodimensional wedges and 'delta' wings) on the base pressure. Shock waves generated by over-expanding the airflow in an open-jet wind tunnel have been used to determine the effect of shock strength on the base pressure of an axisymmetric fuel injector. Both peripheral bleed and axial bleed of hydrogen fuel have been examined and the effect of shock compression on the resulting flame has been determined. In the axial bleed case nitrogen and hydrogen bleed without combustion has also been examined. The effect of varying the airflow stagnation temperature has also beeninvestigated. It is demonstrated herein that there is a distinct shock/wake interaction position that maximises the base pressure, that with interaction at this optimal position the static pressure rise across the shock wave can be communicated in full to the base of the centrebody, and that favourable aerodynamic interference between the wake and a cowl of 50 convergent-divergent internal section can give rise to a net drag reduction. The shock/wake and shock/flame experiments demonstrate that a significant base thrust can be generated, however, the fuel efficiency decreases with increasing shock strength. It is shown that the fuel specific impulse is a function of shock strength, interaction position and bleed mode (peripheral or axial). The onset of boundary layer separation due to the adverse pressure gradient encountered when the base pressure is high appears to limit the useful addition of wake combustion. Finally, it is demonstrated that the base pressure, with and without combustion, is only a weak function of airflow stagnation temperature.

No description available.

ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Efforts are underway to develop Infrared countermeasure (IRCM) systems to defend aircraft against IR guided surface-to-air (SAM) and air-to-air (AAM) missiles. One such system is the Large Aircraft Infrared Counter Measure (LAIRCM) which employs temporal, spatial, and spectral missile warning techniques. There is no current technique however, for installed system flight testing of such countermeasures in a realistic temporal, spatial, and spectral environment. This paper is an introduction to the Towed Airborne Plume Simulator (TAPS), a system designed to address this test shortfall. The TAPS operational concept is described as well as techniques for simulating missile signatures.

International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Low cost, commercial off-the-shelf Global Positioning System (GPS) receivers can be used to provide real-time track of ground launched subsonic, sea-skimming missile targets when integrated with existing telemetry equipment and commercial radio modems. GPS reference stations can be deployed that are capable of generating, broadcasting and monitoring Differential GPS corrections that effectively eliminate the deliberate position errors imposed by the Department of Defense. Commercial GPS receivers are effective and provide contiguous position data even during the boost phase of flight when G forces exceed the receiver manufacturer’s published specifications.

ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / Currently most of the missile telemetry systems operate in the lower S-Band frequency range (2200-2290 MHz). Due to Federal Government plans to repurpose this frequency spectrum to commercial entities, missile telemetry systems will have to migrate to operate in the lower C-Band range (4400-4940 MHz) as well. This move in the operational frequency requires the upgrading of not only the Range ground receiving equipment, but the airborne transmitting units as well. This paper will detail the efforts required to augment a missile telemetry unit from operating in S-Band to C-Band.

No description available.

Approved for public release; distribution is unlimited / This thesis examines the decision to assign the Ballistic Missile Defense mission to units of the Colorado and Alaska National Guard. The history of the Nike Ajax, Nike Hercules, Sentinel and Safeguard programs are examined to identify the origins of support for this decision. First-hand sources provide evidence that the National Guard performance in the Nike air defense program is a record of parity and some superiority to equivalent active Army units. Previously documented records of Nike unit inspections and evaluations are included. Perhaps for the first time, the results of a declassified U.S. Army study accepting National Guard participation in the Sentinel/Safeguard missions is reported. Pressures, competing interests and election politics within the context of the American governmental institutions provide insights into the difficult path followed to reach President George W. Bush's 2004 operational declaration, and the uncertainties lying ahead for the Missile-Age Minutemen. The international relations area includes an over-view of the sources of the missile threat to the United States, its friends and allies. With the demise of the Anti-Ballistic Missile Treaty, this thesis gauges the impacts on diplomacy, and shifting priorities and resources within the U.S. Defense structure. The author concludes with personal observations and recommendations. / Major, Colorado Army National Guard

Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2004. / Thesis advisor(s): Javier Salmeron. Includes bibliographical references (p. 77-78). Also available online.

Thesis--School of Advanced Airpower Studies, Maxwell Air Force Base, Ala., 1997-98. / Title from title screen (viewed Oct. 28, 2003). "September 1999." Includes bibliographical references.

Thesis [M.H. Miklaski]-(M.S. in Systems Technology) and (M.S. in Software Engineering)--Naval Postgraduate School, December 2003. Thesis [J.D. Babbitt]-(M.S. in Computer Science)--Naval Postgraduate School, December 2003. / Thesis advisor(s): Man-Tak Shing, James Bret Michael. Includes bibliographical references (p. 287-289). Also available online.