Engineering topics
Publications and source records attributed to Ellis, J. M..
Report discusses proposed low cost very-long-baseline interferometric (VLBI) system for use with Tracking and Data Relay Satellite System (TDRSS) in determining orbits of user satellites. Theoretical accuracies of orbits to be measured by new system compared with similar orbital determinations by other satellite-navigation system, based on anticipated state of VLBI art in year 1990.
Two-part tool reconfigured for variety of jobs. Tool performs several functions useful in layout. Lines, curves, and angles made visible as either bright scribe marks or as dark pencil (or ink) marks. Multipurpose tool speeds up laying out of patterns on sheet metal, wood, plastic, or paper. Tool is carried in pocket, then quickly assembled for service as height gauge, pair of dividers, protractor, surface gauge, or square.
Deep metal boxes and other parts easily fabricated. Adjustable tooling jig for bending brake accommodates spacing blocks and either standard male press-brake die or bar die. Holds spacer blocks, press-brake die, bar window die, or combination of three. Typical bending operations include bending of cut metal sheet into box and bending of metal strip into bracket with multiple inward 90 degree bends. By increasing free space available for bending sheet-metal parts jig makes it easier to fabricate such items as deep metal boxes or brackets with right-angle bends.
System analysis to determine orbital parameters influence on mission scientific objectives under engineering constraints, using value function
System analysis to determine orbital parameters influence on mission scientific objectives under engineering constraints, using value function