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Simplified interplanetary guidance procedures using onboard optical measurements
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hamer, H. A. Johnson, K. G. |
| Copyright Year | 1972 |
| Description | Simplified guidance procedures have been developed which are based on preflight determination of the characteristics of perturbed trajectories. The results are devoted primarily to planetary approach guidance; however, some considerations for midcourse guidance are included. The methods are studied for an Earth-to-Mars trajectory but would be applicable to Grand Tour and other types of missions. Generally requiring only a single onboard optical angular measurement, the approach procedure predicts guidance corrections for the control of periapsis radius as well as orbital plane orientation. An error analysis has shown that the periapsis radius at Mars can be controlled to a 1 sigma accuracy of about 20 km if the guidance is performed 1/2 day before periapsis passage. If the guidance is performed at the Martian sphere of influence (2.2 days before periapsis), the error doubles because of the increased effect of measurement and maneuvering errors. |
| File Size | 1339160 |
| Page Count | 31 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19720016015 |
| Archival Resource Key | ark:/13960/t6n05wz30 |
| Language | English |
| Publisher Date | 1972-05-01 |
| Access Restriction | Open |
| Subject Keyword | Navigation Orbital Mechanics Space Missions Grand Tours Spacecraft Control Mission Planning Trajectory Analysis Space Navigation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
