STUDY OF ELECTROMAGNETIC TECHNIQUES FOR SPACE NAVIGATION.
Abstract
A series of experiments was conducted to investigate the application of template bpectroscopy techniques to the problem of measuring the velocity of space vehicles with respect to natural sources of radiation. A Bausch and Lomb spectrograph was first used with the sun as a source and a template vibrating at 10 cps to provide ac detection of the match point. It was found that hand engraved templates with narrow lines 20 microns in width gave best results because of the extreme contrast obtainable. The measurement uncertainty of this instrument, which was noise limited, averaged 164 meters/ sec. A second spectrograph, designed to be used with a 24 inch telescope for similar work with stellar sources, was also constructed during this period. This instrument uses a 500 cps template vibrator in an attempt to eliminate atmobpheric noise. The noise level with the stellar spectrograph using the sun as the source is reduced to approximately 60 meters/sec. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1963
- Accession Number
- AD0422552
Entities
People
- D. L. Birx
- R. G. Franklin
- R. H. Field
- W. C. Reisener Jr.
Organizations
- Franklin Institute