DOPPLER OPTICAL NAVIGATOR.
Abstract
The objective of this program is to determine the feasibility of techniques leading to a Doppler optical navigator for measuring instantaneous ground speed with 0.1 ft/sec accuracy for altitudes of 250 to 5000 feet. Present microwave Doppler radars are limited in short term accuracy due to the large relative bandwidth of the Doppler return signal which is caused by the large beamwidth (2 degrees). A Doppler optical sensor using a laser transmitter will generate a narrow beam (0.1 milliradian or less) which results in a Doppler return of narrow bandwidth. The approach chosen utilizes a CW laser as a transmitter and detects the Doppler shift in the carrier frequency using optical heterodyning techniques. The program includes laboratory experimentation, literature search and design analysis which shall result in a feasibility breadboard of an Optical Doppler Radar. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1964
- Accession Number
- AD0610737
Entities
People
- A. L. Pogoda
- J. T. Latourrette
- S. Jarrett
- S. Reich
- Steven A. Jacobs
Organizations
- Control Data Corporation