Physics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2460...73n&link_type=abstract
In its Upper and Middle Atmospheric Density Modeling Requirements for Spacecraft Design and Operations p 73-87 (SEE N87-20665 1
Physics
Geomagnetism, Hubble Space Telescope, Magnetic Control, Orbital Maneuvers, Torque, Aeromaneuvering, Angular Momentum, Atmospheric Density, Reaction Wheels, Spacecraft Orbits
Scientific paper
The Hubble Space Telescope will employ magnetic torque controllers, which make use of the Earth's magnetic field augmented by four reaction wheels. DC torques are easily allowed for, but variations, orbit by orbit, can result in excessive wheel speeds which can excite vibratory modes in the telescope structure. If the angular momentum from aerodynamic sources exceeds its allocation of 100 Nms, the excess has to come out of the maneuvering budget since the total capacity of the momentum storage system is fixed at 500 Nms. This would mean that maneuvers could not be made as quickly, and this would reduce the amount of science return. In summary, there is a definite need for a model that accurately portrays short term (within orbit) variations in density for use in angular momentum management analyses. It would be desirable to have a simplified model that could be used for planning purposes; perhaps applicable only over a limited altitude range (400 to 700 km) and limited latitude band.
No associations
LandOfFree
Hubble Space Telescope does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hubble Space Telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hubble Space Telescope will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1013651