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Continuous prediction of spartan visibility from orbiter over modeled free-flight mission
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | King, J. C. |
| Copyright Year | 1985 |
| Description | Orbital operations in the neighborhood of other satellites or free-flying objects need the ability to see and detect such objects optically. This ability depends primarily on the brightness of the object relative to other sources present. The present analysis and computational procedure provides a means for predicting the visual brightness of a satellite when viewed from a nearby satellite in the same orbit. It is designed specifically for estimating the brightness of Spartan free-flyers from the STS Orbiters which release and later retrieve them, but the basic methods are applicable to other satellite-to-satellite visibility prediction problems. The Spartan reflector model defined herein is illuminated both by direct solar radiation and by the earth (albedo), producing a model source of defined directional intensity. The intensity in the Orbiter direction (along orbit) yields the desired maximum range directly. The required geometric and photometric calculations involve a number of angles in space, which are readily computed from the basic directions defining their sides. The time-dependent directions are determined by straightforward calculation from fundamental relationships and constants. |
| File Size | 736873 |
| Page Count | 23 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870002392 |
| Archival Resource Key | ark:/13960/t0rr6qr4z |
| Language | English |
| Publisher Date | 1985-01-01 |
| Access Restriction | Open |
| Subject Keyword | Space Communications, Spacecraft Communications, Command And Tracking Optical Tracking Satellite-to-satellite Tracking Spartan Satellites Brightness Earth Albedo Angles Geometry Visibility Solar Radiation Space Shuttle Orbiters Photometry Spacecraft Tracking Reflectance 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 |
