Status of CNES optical observations of space debris in geostationary orbit

Alby, F.; Boër, M.; Deguine, B.; Escane, Isabelle; Newland, Franz; Portmann, Christophe

doi:10.1016/j.asr.2003.01.016

Cited by 16 publications

(3 citation statements)

References 2 publications

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“…Optical observation is now widely used in space debris observation because it is unrestricted by the distance to observation objects and is cost-efficient compared to radar, and several countries and organizations have carried out optical space debris observation [4][5][6][7][8][9][10][11][12][13][14][15][16]. Electro-optical (EO) sensors are the primary instrument for optical observation systems.…”

Section: Introductionmentioning

confidence: 99%

A New Triangulation Algorithm for Positioning Space Debris

Chen

Liu

et al. 2021

Remote Sensing

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A single electro-optical (EO) sensor used in space debris observation provides angle-only information. However, space debris position can be derived using simultaneous optical measurements obtained from two EO sensors located at two separate observation sites, and this is commonly known as triangulation. In this paper, we propose a new triangulation algorithm to determine space debris position, and its analytical expression of Root-Mean-Square (RMS) position error is presented. The simulation of two-site observation is conducted to compare the RMS positioning error of the proposed triangulation algorithm with traditional triangulation algorithms. The results show that the maximum RMS position error of the proposed triangulation algorithm is not more than 200 m, the proposed triangulation algorithm has higher positioning accuracy than traditional triangulation algorithms, and the RMS position error obtained in the simulation is nearly consistent with the analytical expression of RMS position error. In addition, initial orbit determination (IOD) is carried out by using the triangulation positioning data, and the results show that the IOD accuracy of two-site observation is significantly higher than that of the single-site observation.

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Section: Introductionmentioning

confidence: 99%

A New Triangulation Algorithm for Positioning Space Debris

Chen

Liu

et al. 2021

Remote Sensing

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“…Telescope observations offer an effective solution to the problem of observing objects in geostationary orbit. Automated process of measurements similar to Canada's SQUID, CNES's TAROT and ROSACE is required not only for space debris measurements but also for monitoring of countries space assets especially for collision risk [1] [4].…”

Section: Discussionmentioning

confidence: 99%

Optical monitoring of inter satellite distance between Turksat-2A And Turksat-3A

Gürol

Gülgönül

Gökay

et al. 2011

Proceedings of 5th International Conference on Recent Advances in Space Technologies - RAST2011

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Geostationary satellites are objects, which revolve around the Earth where orbits are nearly circular and located on the equator plane with a period exactly equal to the rotation of the Earth. Most of such satellites are used for civil and military communication, television broadcasting and weather forecasting. Gravitational forces of the Sun, Moon and non-uniform mass distribution of the Earth perturb the geostationary orbits. Including these gravitational anomalies pressure of Solar winds is another source of perturbation. Because of these perturbations, orbits of geostationary satellites disturbed and some correction maneuvers must be performed. ITU radio regulation requires geostationary satellites have capability of maintaining their positions within ±0.1° of the longitude of their nominal positions [2]. Multiple numbers of colocated geostationary satellites can be operated within ±0.1° box with careful orbit determination and maneuver strategies. Most orbit determinations of the geostationary satellites are performed by tone ranging; measuring phase difference of RF signals sent to satellite and received from the satellite. Angular parameters of the satellites are obtained by azimuth and elevation of the control station antennas, which are following beacon signal of the satellite. Because of all geostationary satellites must be located on geostationary orbit, collision risk always exists. Telescope observation of geostationary satellites provides us to complimentary information to tone ranging systems, which can be used for correlation and calibration purposes.In this study, inter-satellite distances of co-located Turksat-2A and Turksat-3A satellites measured by telescope observations. This optical observation performed in 2011 at the Ankara University Observatory (AUO) using 20 cm (8-inch) optical telescope and with a CCD type detector. The inter-satellite distances are calculated by using the observed angular measurements between Turksat-2A and Turksat-3A and the radial distance measured with tone ranging. Results are compared with tone ranging orbit measurements performed by Turksat Satellite Control Center.

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“…Due to the fact that near-earth objects can be illuminated by the Sun during nighttime, optical observation is a feasible and realistic technique for space debris detection. To date, several countries and organizations have carried out optical space debris surveys and published their results (Schildknecht et al 2001(Schildknecht et al , 2004(Schildknecht et al , 2008Rykhlova et al 2001;Seitzer et al 2004;Molotov et al 2008;Porfilio et al 2004;Alby et al 2004;Musci et al 2004Musci et al , 2005Hebert et al 2001;Sun & Zhao 2012).…”

Section: Introductionmentioning

confidence: 99%

A new source extraction algorithm for optical space debris observation

Sun¹,

Zhao²

2013

Res. Astron. Astrophys.

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Specific challenges arise in the task of real-time automatic data reduction of optical space debris observations. Here we present an automatic technique that optimally detects and measures the sources from images of optical space debris observations. We show that highly reliable and accurate results can be obtained on most images produced by our specific sensors, and due to optimizations, the whole pipeline works fast and efficiently. Tests demonstrate that the technique performs better than SExtractor from the point of view of fast and accurate detection, therefore it is well suited for data reduction of optical space debris observations.

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Status of CNES optical observations of space debris in geostationary orbit

Cited by 16 publications

References 2 publications

A New Triangulation Algorithm for Positioning Space Debris

A New Triangulation Algorithm for Positioning Space Debris

Optical monitoring of inter satellite distance between Turksat-2A And Turksat-3A

A new source extraction algorithm for optical space debris observation

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