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Hybrid Velocity Data for the Velocity Measuring System of the Supersonic Naval Ordnance Research Track

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2 Author(s)
Stirton, R.J. ; U. S. Naval Ordnance Test Station, China Lake, Calif. ; Glatt, B.

A system is described for measuring the velocity of test sleds on the Supersonic Naval Ordnance Research Track (SNORT) with an rms error of less than 0.1 ft/second over a velocity range of 200 to 2000 ft/second and a bandwidth of 50 cps. Instrumentation consists of two data sources: sled-position vs time is measured with a magnetic-pickup track-coil system, and sled acceleration vs time is measured with a sled-borne accelerometer and PDM telemetry system. The tape-recorded data are converted to digital form and entered into the IBM-704 computer by automatic assessment equipment. The two different sets of data are combined by a near-optimum digital filtering technique to provide a set of hybrid wide-bandwidth data.

Published in:

Proceedings of the IRE  (Volume:47 ,  Issue: 5 )