Results 111 to 120 of about 11,650 (287)

Precise near-earth navigation with GPS: A survey of techniques [PDF]

open access: yes
The tracking accuracy of the low earth orbiters (below about 3000 km altitude) can be brought below 10 cm with a variety of differential techniques that exploit the Global Positioning System (GPS). All of these techniques require a precisely known global
Wu, J., Wu, S. C., Yunck, T. P.
core   +1 more source

Incremental solution of LTMGA transfers transcribed with an advanced shaping approach [PDF]

open access: yes, 2010
In the last decade the global optimisation of low-thrust multi-gravity assist transfers (LTMGA) has been tackled with different approaches. Some authors proposed to generate a first guess solution by building a multi-gravity assist transfer with ...
Novac, Daniel, Vasile, Massimiliano
core  

Relative Orbit Control Algorithms and Scenarios for the Inertial Alignment Hold Demonstration Mission by CubeSat Formation Flying

open access: yesAerospace
CANYVAL-C is a formation-flying mission that demonstrates a coronagraph utilizing two CubeSats. The coronagraph is a space telescope that blocks sunlight to examine the overcast regions around the sun. It is composed of optical and occult segments.
Soobin Jeon   +2 more
doaj   +1 more source

Orbiter-orbiter and orbiter-lander tracking using same-beam interferometry [PDF]

open access: yes, 1992
Two spacecraft orbiting Mars will subtend a small angle as viewed from Earth. This angle will usually be smaller than the beam width of a single radio antenna. Thus the two spacecraft may be tracked simultaneously by a single Earth-based antenna.
Border, J. S., Folkner, W. M.
core   +1 more source

Solving Coplanar Power-Limited Orbit Transfer Problem by Primer Vector Approximation Method

open access: yesInternational Journal of Aerospace Engineering, 2012
The coplanar orbit transfer problem has been an important topic in astrodynamics since the beginning of the space era. Though many approximate solutions for power-limited orbit transfer problem have been developed, most of them rely on simplifications of
Weijun Huang
doaj   +1 more source

Orbital Dynamics of an Oscillating Sail in the Earth-Moon System [PDF]

open access: yes, 2017
The oscillating sail is a novel solar sail configuration where a triangular sail is released at a deflected angle with respect to the Sun-direction. As a result, the sail will conduct an undamped oscillating motion around the Sun-line due to the offset ...
Ceriotti, Matteo, Heiligers, Jeannette
core  

Liquid Apogee Engine Burn Plans for The KOREASAT-3 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1998
The apogee manoeuvre of is basic elliptical orbit transfer converting orbit plane. The KOREASAT-3 is planed for multi-burn manoeuvres using the liquid apogee engine while the used the apogee kick motor that executes a single burn in the apogee of ...
Jae-Cheol Yoon   +4 more
doaj  

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