Results 271 to 280 of about 222,732 (294)

Nonlinear Tracking Control for Satellite Formations

Journal of Guidance, Control, and Dynamics, 2002
A tracking control law using a sliding mode framework is derived to control a satellite formation. Hill's relative motion equations are used to model the follower satellite's motion relative to the leader. To minimize fuel required to maintain the formation, each satellite is constrained to reside near a natural orbit.
null Hsi-Han Yeh, E. Nelson, A. Sparks
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Satellite Tracking and ObservationModels

2000
Orbit determination of an artificial satellite requires as input measurements that are related to the satellite’s position or velocity. These data are collected by a satellite tracking system that measures the properties of electromagnetic wave propagation between the transmitter and the receiver. The transmitter as well as the receiver may either be a
Oliver Montenbruck, Eberhard Gill
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Orbit Determination Using Satellite-to-Satellite Tracking Data

Chinese Journal of Astronomy and Astrophysics, 2001
Satellite-to-Satellite Tracking (SST) data can be used to determine the orbits of spacecraft in two ways. One is combined orbit determination, which combines SST data with ground-based tracking data and exploits the enhanced tracking geometry. The other is the autonomous orbit determination, which uses only SST.
Ying-Chun Liu, Lin Liu
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Photographic tracking of artificial satellites

Space Science Reviews, 1970
A review of the development of photographic tracking techniques in different countries during the recent 5–6 yr is given. Main results of scientific investigations based on observations with Baker-Nunn cameras are considered. New large Soviet, English, French, German cameras are described.
A.G. Massevitch, A.M. Losinsky
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Segmentation-based orbiting satellite tracking

Proceedings of the 5th International Conference on Multimedia and Image Processing, 2020
To obtained the trajectory of an orbiting satellite is a fundamental and vital step for space rendezvous and manipulation by space robots. Due to the freely and rapidly motion of on-orbiting satellites, the sudden change in appearance, orbiting satellite tracking is difficult for traditional tracker, which usually relies on a single bounding box of the
Yunda Sun, Peizhuo Li, Xue Wan
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Dynamics of SLR tracked satellites

Reviews of Geophysics, 1995
This report summarizes recent progress in orbit determination and the role of Satellite Laser Ranging (SLR) in advancing the state of its art. In the past four years, major improvements in our ability to position a near‐Earth SLR satellite within a well understood and stable geocentric frame have occurred.
J. A. Marshall, S. M. Klosko, J. C. Ries
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Satellite tracking of Wandering albatrosses

Nature, 1990
ALTHOUGH the study of seabirds in their land-based breeding colonies has attracted much attention, an understanding of their ecology at sea, particularly their foraging range and the location of their feeding zones, remains a major challenge1. The foraging range of pelagic feeders nesting on a given colony or island is purely speculative2,3.
Pierre Jouventin, Henri Weimerskirch
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A new satellite tracking antenna

WESCON/57 Conference Record, 2005
Dual terminal linear arrays have very unusual and useful characteristics which have not previously received adequate attention. We have investigated analytically and experimentally the radiation patterns from such arrays considering both sum and difference patterns from the two terminals as functions of (1) wavelength, and (2) amplitude and phase ...
C. Sletten, F. Holt, P. Blacksmith, G. Forbes, L. Shodin, H. Henkel   +5 more
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Tracking Elephants by Satellite

Science, 1992
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Optical tracking of artificial satellites

Space Science Reviews, 1963
The paper outlines the principles of optical tracking of artificial satellites, with emphasis on high-accuracy techniques. Various methods for determining the apparent position of a satellite at a known time are discussed, for both visual and photographic tracking.
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