SPS Feasability Study SD76SA0239-2

Figure 2.1-13. Normalized Sections invoked throughout the structure, all joint requirements reduce to the three joints illustrated by Figure 2.1-7. Most importantly, these joints can be assembled by automatic beam-making machinery. 2.1.3 Microwave Antenna Structure Prior to initiation of this study, Rockwell had conducted a review of microwave antenna concepts developed by Grumman (Contract NAS 3-17835) and by Martin Marietta (Contract NAS9-14319) (Figure 2.1-14). Both concepts provided a 1-km diameter rigid structure of significant depth. The results of these