Estimation of thruster plumes for resident space object optical observation

2020 ◽  
Author(s):  
Keith F. Prussing ◽  
Anissa Zacharias ◽  
John Corker
Keyword(s):  
Optical Observation ◽  
Space Object

Ground Photometric Measurements Inversion Methods for Space Object Characteristics Based on Nonlinear Filtering: A Short Review

2021 ◽  
Vol 14 ◽  
Author(s):  
Yang Wang ◽  
Xiaoping Du ◽  
Can Xu ◽  
Zhihao Ma ◽  
Zhiyong Yin
Keyword(s):  
Optical Observation ◽  
Observation System ◽  
Inversion Method ◽  
Linear Filtering ◽  
Space Object ◽  
Time Duration ◽  
Inversion Methods ◽  
Non Linear ◽  
Space Objects ◽  
Photometric Measurements

: The ground space optical observation system considered as one of the main measurement methods to observe space object in Medium Earth Orbit (MEO), Highly Elliptical Orbit (HEO), and Geostationary Orbit (GEO) experiences difficulties in forming high-solution images for objects located in GEO that only appear as several light spots with limited pixels due to the impacts of observing distance, resolution ratio, and other atmospheric conditions. The light curve is the time duration of an object’s observed brightness. Through light curves, right ascension, and declination of space objects obtained from the ground-based optical observation system, the characteristic of space objects such as position, velocity, size, shape, and material can be inverted. This paper has analyzed the principles, applications, merits, and demerits of several non-linear filtering methods in detail. Besides, the scientific description of inversion for characteristics of a non-resolved space object from ground photometric measurements and the essence of the non-linear filtering inversion method have also been clarified. A selection principle of the non-linear filtering inversion method for different space object characteristics is then proposed, and the developing direction of such inversion methods is also described in the end.

First optical observation of Kossel diagrams in chiral smectic phases

1990 ◽  
Vol 51 (18) ◽  
pp. 2087-2099 ◽  
Author(s):  
H.-S. Kitzerow ◽  
G. Heppke ◽  
H. Schmid ◽  
B. Jérôme ◽  
P. Pieranski
Keyword(s):  
Optical Observation ◽  
Smectic Phases

Space Object Temperature Determination from Multi-Band Infrared Measurements

2008 ◽  
Author(s):  
Charles Paxson ◽  
Hilary E. Snell ◽  
James M. Griffin ◽  
Kathleen Kraemer ◽  
Steve Price ◽  
...  
Keyword(s):  
Space Object ◽  
Temperature Determination ◽  
Object Temperature ◽  
Infrared Measurements ◽  
Multi Band

METHOD FOR ESTIMATING PARAMETERS OF GENERALIZED MODEL OF LUMINOSITY OF SPACE OBJECTS BASED ON DATA FROM DIFFERENT RANGES

2018 ◽  
pp. 57-62
Author(s):  
E. I. Gundrova ◽  
A. P. Lukyanov ◽  
A. V. Pruglo ◽  
S. S. Ravdin
Keyword(s):  
Phase Angle ◽  
Real Data ◽  
Model Data ◽  
Space Object ◽  
Distribution Law ◽  
Generalized Model ◽  
Measurement Results ◽  
Space Objects ◽  
Reference Distance

Previously, the authors have proposed a generalized model for estimating the distribution law parameters of luminosity of space objects, assuming that not only successful but also unsuccessful measurement results are taken into account. Estimation was done on the data of observations under similar conditions: phase angle, range, sensibility of the telescope. The algorithm under such limitations was tested on model data and real measurements. Therefore, obtained results showed that algorithm did not fit for cases of changing range of space objects. In this work, the new algorithm, that allows to merge information from different ranges to the observed space object, is proposed. In this case, luminosity values are reduced to the ones at a reference distance of 1000 km considering sensibility of the telescope. To obtain estimates of the parameters the Cramer-Mises-Smirnov criterion is used. This algorithm was tested on model data and results of its work on real data were obtained. The data showed correct work of the algorithm and also confirmed the practicability of organization the registration of unsuccessful measurements.

scholarly journals Space, object, and task selection

2009 ◽  
Vol 71 (5) ◽  
pp. 995-1014 ◽  
Author(s):  
Joel Lachter ◽  
Roger W. Remington ◽  
Eric Ruthruff
Keyword(s):  
Space Object ◽  
Task Selection ◽  
And Task
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