AAWSAP DIRD, Detection and High-Resolution Tracking of Vehicles at Hypersonic Velocities, November 2010

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Figures
Figure 1. Boundary Layer Development in Subsonic Flow about a Projectile........................ 4
Figure 2. Subsonic Flow Past a Projectile....................................................................... 5
Figure 3. Strauhal Frequency as a Function of Reynolds Number for Flow over a
Circular Cylinder .. .............. .............................. ............................................. 6
Figure 4. Supersonic Flow Past a Wedge-Shaped Body .................................................... 8
Figure 5. Supersonic Flow Past a Blunt Body (Spheroid) .................................................. 8
Figure 6. Ratios of Mach Number, Temperature, and Pressure Across a Normal Shock .... ... 10
Figure 7. Hypersonic Vehicle Detection Techniques ....................................................... 11
Figure 8. Laser-Based Chronograph ... ......... ............. ................................................... 12
Figure 9. Electromagnetic Spectrum as a Function of Wavelength ................................... 13
Figure 10. Schematic of a RADAR System................................................................... 14
Figure 11. Radio Reflection Detector................ .. ......................................................... 16
Figure 12. Energy Spectrum of the Sun at 5,778 K....................................................... 19
Figure 13. Hypersonic Flow Past a Sphere... ................................................................ 20
Figure 14. Infrared Energy Spectra for Mach 3 and Mach 3.5 ......................................... 21
Figure 15. Peak Wavelength of the Infrared Radiation Emitted by Hypersonic Objects ........ 22
Figure 16. Peak Shock Layer Temperature for Hypersonic Objects .................................. 22
Figure 17. Schematic of a Pulsed LIDAR System ........................................................... 24
Figure 18. Mach Cone Generated by a Supersonic Object .............................................. 26
Figure 19. Comparison of Detection Technology for Hypersonic Objects ........................... 32
Tables
Table 1: Normal Shock Values for Mach 3 Flow ...............................................................9
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