RADAR STUDY OF SPHERE WAKES
Technical rept. Jan-Dec 1965
ARO INC ARNOLD AFS TN
Pagination or Media Count:
A series of firings was executed in the 100-ft Range K of the VKF for the purpose of determining the causes of radar reflections from the wakes of hypervelocity spheres. A 35-kmc, focused, oblique radar was employed as the primary instrumentation. In addition, receiving and parasite antennas were used to measure transmission and specular reflection. The results of these experiments indicate that, when using the 35-kmc microwave equipment described here, a detectable radar reflection in most cases was obtained from the wake of a hypervelocity sphere 10,000 to 27,000 ftsec in these experiments only if the sphere ablated. Measurements of turbulent wake velocity were shown to agree with the predicted values. The region of transition from laminar to turbulent flow was also defined.
- Active and Passive Radar Detection and Equipment