Pulsed optimal reorientation of the orbit of a spacecraft by means of jet thrust, orthogonal to the osculating orbit plane

2018 ◽  
pp. 70-89
Author(s):  
Ya. Sapunkov ◽  
Keyword(s):  
Orbit Plane

scholarly journals SUPERLUMINAL SYNCHROTRON RADIATION

2018 ◽  
pp. 19-25
Author(s):  
M.A. Aginian ◽  
S.G. Arutunian ◽  
E.G. Lazareva ◽  
A.V. Margaryan
Keyword(s):  
Electromagnetic Field ◽  
Synchrotron Radiation ◽  
Vertical Direction ◽  
Outer Wall ◽  
Lorentz Factor ◽  
Electric Force ◽  
Orbit Plane ◽  
Radiation Emission ◽  
Beam Dynamic ◽  
Emission Point

To avoid complex computations based on wide Fourier expansions, the electromagnetic field of synchrotron radiation (SR) was analyzed using Lienard–Wiechert potentials in this work. The retardation equation was solved for ultrarelativistic movement of rotating charge at distances up to the trajectory radius. The radiation field was determined to be constricted into a narrow extended region with transverse sizes approximately the radius of trajectory divided by the particle Lorentz factor (characteristic SR length) cubed in the plane of trajectory and the distance between the observation and radiation emission point divided by the Lorentz factor in the vertical direction. The Lienard–Wiechert field of rotating charge was visualized using a parametric form to derive electric force lines rather than solving a retardation equation. The electromagnetic field of a charging point rotating at superluminal speeds was also investigated. This field, dubbed a superluminal synchrotron radiation (SSR) field by analogy with the case of a circulating relativistic charge, was also presented using a system of electric force lines. It is shown that SSR can arise in accelerators from “spot” of SR runs faster than light by outer wall of circular accelerator vacuum chamber. Furthermore, the mentioned characteristic lengths of SR in orbit plane and in vertical direction are less than the interparticle distances in real bunches in ultrarelativistic accelerators. It is indicating that this phenomenon should be taken into account when calculating bunch fields and involved at least into the beam dynamic consideration.

scholarly journals Foundations of a theory of the motion of the orbit plane of Hyperion

1996 ◽  
Vol 172 ◽  
pp. 127-136
Author(s):  
P.J. Message
Keyword(s):  
Observational Data ◽  
Orbit Plane ◽  
Long Period

The principles are set out for the construction of a theory of the motion of the orbit plane of Hyperion, using the mixed set of angle parameters, using different reference planes for different angles, which it has proved convenient to use. It is found that this leads to additional terms, which have not been shown in previous published theories. The theory is developed in general principles exactly, and in detail as far as is needed to enable comparison to be made with the observational data at present available, and, from parameters which have been derived from opposition means from the period 1875 to 1922, the co-efficients of some of the larger long-period terms are computed.

scholarly journals The Use of Lie Series in The Construction of a Perturbation Theory and some Recent Results in The Theory of The Motion ofd Hyperion

1999 ◽  
Vol 172 ◽  
pp. 349-358
Author(s):  
P.J. Message
Keyword(s):  
Perturbation Theory ◽  
Generating Function ◽  
Orbital Elements ◽  
Lie Series ◽  
Orbit Plane ◽  
Long Period ◽  
Short Period ◽  
First Results ◽  
Series Transformation

AbstractThis paper begins with a brief review of a form of the Lie series transformation, and then reports some new results in the study, using Lie series methods, of the orbit of Saturn’s satellite Hyperion. In particular, improved expressions are given for the long-period perturbations of the orbital elements which describe the motion in the orbit plane, and also first results for expressions for the short-period perturbations in the apse longitude, derived from the Lie series generating function.

scholarly journals The OSIRIS instrument on the Odin spacecraft

2004 ◽  
Vol 82 (6) ◽  
pp. 411-422 ◽  
Author(s):  
E J Llewellyn ◽  
N D Lloyd ◽  
D A Degenstein ◽  
R L Gattinger ◽  
S V Petelina ◽  
...  
Keyword(s):  
Lower Thermosphere ◽  
Solar Spectrum ◽  
Orbit Plane ◽  
Vertical Field ◽  
Array Detectors ◽  
Infrared Imager ◽  
Airglow Emissions ◽  
Dimensional Distribution ◽  
Mesosphere And Lower Thermosphere ◽  
Absorption Features

The optical spectrograph and infrared imager system (OSIRIS) on board the Odin spacecraft is designed to retrieve altitude profiles of terrestrial atmospheric minor species by observing limb-radiance profiles. The grating optical spectrograph (OS) obtains spectra of scattered sunlight over the range 280–800 nm with a spectral resolution of approximately 1 nm. The Odin spacecraft performs a repetitive vertical limb scan to sweep the OS 1 km vertical field of view over selected altitude ranges from approximately 10 to 100 km. The terrestrial absorption features that are superimposed on the scattered solar spectrum are monitored to derive the minor species altitude profiles. The spectrograph also detects the airglow, which can be used to study the mesosphere and lower thermosphere. The other part of OSIRIS is a three-channel infrared imager (IRI) that uses linear array detectors to image the vertical limb radiance over an altitude range of approximately 100 km. The IRI observes both scattered sunlight and the airglow emissions from the oxygen infrared atmospheric band at 1.27 µm and the OH (3-1) Meinel band at 1.53 µm. A tomographic inversion technique is used with a series of these vertical images to derive the two-dimensional distribution of the emissions within the orbit plane. PACS Nos.: 07.05.Pj, 07.60.Dq, 07.60.Rd, 07.87, 94.10.Dy, 94.10.Fa, 94.10.Gb, 94.10.Rk

Gravity Field Estimation from GRACE Follow-On Data: Results from CSR Analyses

2020 ◽  
Author(s):  
Srinivas Bettadpur ◽  
Himanshu Save ◽  
Peter Nagel ◽  
Nadège Pie ◽  
Steven Poole ◽  
...  
Keyword(s):  
Gravity Field ◽  
Lessons Learned ◽  
System Component ◽  
Science Data ◽  
Orbit Plane ◽  
Flight Data ◽  
University Of Texas ◽  
Earth Gravity ◽  
Grace Data ◽  
Gravity Field Models

<p>At the time of presentation, nearly two years of flight data from the joint NASA/GFZ GRACE Folllow-On mission will have been collected. In this time, gravity field models have been produced using two independent inter-satellite tracking systems - the MWI and the LRI using radio and optical interferometry, respectively. The data have been analyzed over more than two complete cycles of the sun relative to the orbit plane, allowing a characterization of the environmental impacts on the flight data. Extended duration of analyses have also permitted an assessment of the GRACE-FO data relative to the corresponding GRACE data.</p><p>This poster presents the status and lessons learned from two years of estimation of Earth gravity field models from the GRACE-FO data at the science data system component at the University of Texas Center for Space Research.</p>

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