TAROT: A Network supporting Space Surveillance and Tracking Operations

Richard, Pascal; Boër, M.; Klotz, A.; Eymar, Loïc; Pérez, Juan Carlos Dolado; Verzeni, Agnès; Nicolin, Jérôme; Théron, Sébastien; Gallego, Ángel; Lluva, David Jimenez

doi:10.2514/6.2018-2718

Cited by 3 publications

(5 citation statements)

References 1 publication

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“…• TAROT (Télescopes à Action Rapide pour les Objets Transitoires) 8 : It is a French-led network which consist of 2 × 0.25-m (FOV 1.8°× 1.8°), 1 × 0.18-m (4°× 4°) telescopes at three sites worldwide in addition to the 1-m Zadko telescope (FOV 20" ×20") at Gingin Observatory. They can be used to take photometric images with Sloan filters for multiple science goals, such as resident space objects, GRBs (Boer et al, 2017). • TAT (Taiwan Automated Telescope) Network: This network is planned to install several robotic telescopes worldwide.…”

Section: Robotic Telescope Network Worldwidementioning

confidence: 99%

The burst observer and optical transient exploring system in the multi-messenger astronomy era

Fernández-García

Caballero‐García

et al. 2023

Front. Astron. Space Sci.

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The Burst Observer and Optical Transient Exploring System (BOOTES) was first designed as an asset of autonomous telescopes that started to be deployed in 1998, taking 24 years to be fully developed around the earth. Nowadays BOOTES has became a global network of robotic telescopes, being the first one present in all continents, as of 2022. Here we present the details of the network and review its achievements over the last 2 decades regarding follow-up observations of high-energy transient events. Moreover, considering the recent operations of neutrino and gravitational wave detectors, some hot-topic expectations related to robotic astronomy are discussed within the framework of multi-wavelength astrophysics.

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Section: Robotic Telescope Network Worldwidementioning

confidence: 99%

The burst observer and optical transient exploring system in the multi-messenger astronomy era

Fernández-García

Caballero‐García

et al. 2023

Front. Astron. Space Sci.

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“…The selected object is the rocket body of an Ariane 44L launched in 2002 and catalogued with NORAD ID 27402. This object is on a geostationary transfer orbit (GTO) with semi-major axis of about 23 000 km and inclination of 3.9°, and is regularly tracked by the optical telescopes of the TAROT network [27]. Two analyses are conducted to highlight different aspects of the proposed tool.…”

Section: Numerical Applicationmentioning

confidence: 99%

A Multifidelity Approach to Robust Orbit Determination

Fossà¹,

Armellín²,

Delande³

et al. 2023

Preprint

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This paper presents an algorithm for the preprocessing of observation data aimed at improving the robustness of orbit determination tools. Two objectives are fulfilled: obtain a refined solution to the initial orbit determination problem and detect possible outliers in the processed measurements. The uncertainty on the initial estimate is propagated forward in time and progressively reduced by exploiting sensor data available in said propagation window. Differential algebra techniques and a novel automatic domain splitting algorithm for second-order Taylor expansions are used to efficiently propagate uncertainties over time. A multifidelity approach is employed to minimize the computational effort while retaining the accuracy of the propagated estimate. At each observation epoch, a polynomial map is obtained by projecting the propagated states onto the observable space. Domains that do no overlap with the actual measurement are pruned thus reducing the uncertainty to be further propagated. Measurement outliers are also detected in this step. The refined estimate and pruned observations are then used to improve the robustness of batch orbit determination tools. The effectiveness of the algorithm is demonstrated for a geostationary transfer orbit object using synthetic and real observation data from the TAROT network.

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“…A network of passive telescopes dedicated to the Space Surveillance and Tracking operations called TAROT (Télescope à Action Rapide pour les Objets Transitoires) was developed for France's space sector starting in 2000 [13]. The network is composed of three small telescopes (two of them have a 25 cm aperture and one has an 18 cm aperture) and a large telescope (1 m aperture), distributed in France, Chile, Réunion Island, and Australia.…”

Section: Related Workmentioning

confidence: 99%

“…To overcome the first challenge, we have to take into consideration the time between the calibration and the observation. Denoting the time of the observation point i as ti, the time of the calibration c as tc, and the angular coordinates provided by wcs-xy2rd as RAc and DECc, the angular coordinates for the point i will be computed as: 𝑅𝐴 , = 𝑅𝐴 + 15 (𝑡 − 𝑡 ) 1.0027379093 (12) 𝐷𝐸𝐶 𝑖,𝑐 = 𝐷𝐸𝐶 𝑐 (13) In Equation (12), the times are expressed in hours, and the angles in degrees. The equation will compensate for the Earth's rotation during the time difference, with a speed of 15 degrees for every sidereal hour.…”

Section: Computing the Angular Coordinates Of The Trackletsmentioning

confidence: 99%

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SST Anywhere—A Portable Solution for Wide Field Low Earth Orbit Surveillance

et al. 2022

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The low-Earth orbit (LEO) is filled with active satellites, but also with space debris, which need constant observation. The orbiting objects may be affected by collisions or by atmospheric drag, and therefore they can change their orbit or even fall to the ground, a process known as reentry. The low altitude of these objects (below 2000 km, usually even below 1000 km) means that at given time they can be observed from a limited range of locations on the Earths’ surface, and therefore having multiple, easy to set up observation stations can be extremely useful. This paper presents a portable hardware solution for on-demand wide-field surveillance of the LEO region, the image processing algorithms for detecting the satellite streaks and for joining these streaks into tracklets, and the solution for astrometrical reduction and generating the result file for each tracklet. An automatic validation solution that is able to automatically identify the detected satellites and compute the measurement angular errors is also presented. The acquisition and processing system is built with commercially available items of low and moderate costs and is capable of on-site acquisition and real-time processing of images. The acquired images are processed by background subtraction, analysis of the difference between frames, extraction of elongated objects corresponding to the satellite streaks, and forming trajectories (tracklets) from consecutive detections. The pixel coordinates of the tracklets are converted to angular coordinates using the tools from Astrometry.net, subsequently filtered for improving the accuracy. The results are validated by using daily updated orbital parameters (TLEs), which are used to predict the angular positions that are subsequently matched with the detection results.

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TAROT: A Network supporting Space Surveillance and Tracking Operations

Cited by 3 publications

References 1 publication

The burst observer and optical transient exploring system in the multi-messenger astronomy era

The burst observer and optical transient exploring system in the multi-messenger astronomy era

A Multifidelity Approach to Robust Orbit Determination

SST Anywhere—A Portable Solution for Wide Field Low Earth Orbit Surveillance

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