Apparent magnitude calculation method for complex shaped space objects

Wang, Yang; Du, Xiaoping; Zhao, Jinhua; Gou, Ruixin

doi:10.1016/j.asr.2018.07.033

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Optical models of resolved objects are described in the literature, but present limitations. Yang Wang et al [14] and Hongyuan Wang et al [15] for example use simplified rendering techniques linked to real-time constraints, which do not allow complex reflections to be represented. Global illumination rendering methods are the most realistic to date.…”

Section: Previous Workmentioning

confidence: 99%

Hyperspectral optical modeling of resident space objects at high spatial resolution

Coiro,

Tricoli,

Margall

et al. 2024

Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imaging XXX

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The proliferation of objects in space is a growing concern, and it is becoming crucial to have reliable information about these objects in order to be able to locate and identify them. The aim of this paper is to present SIRIUS (Simulateur tool dedicated to optical modeling of resident space objects (RSO) in order to design or configure ground-based or space-based future observation systems. This tool presents an innovative feature as it generates hyperspectral highly spatially resolved images, at low computation time. Images are physically realistic thanks to the use of a global illumination method implemented through optimized rendering methods on GPU. The optical signature of a RSO is calculated in the visible range, with a possible extension to infrared. The radiative environment consists of the Sun and the Earth (ground, and possibly atmosphere and clouds), and the reflectivity of the RSO is described by Spectral Bidirectional Reflectance Distribution Function (sBRDF) for each material with physical modelling of geometry wrinkling for MLI materials. The orbit, orientation and mobile parts rotation (solar panels of satellite) are taken into account dynamically over time. The result of the simulation consists of a series of spectral images at the sensor of turbulence and the sensor may be modeled using a Point Spread Function (PSF). In this paper, we propose a validation of the SIRIUS tool based on a comparison of a simulated light curve obtained from ENVISAT images taken with the MeO telescope at the OCA (Côte d'Azur Observatory, France) during 2019, and an evaluation of the MLI wrinkling on the signature. The comparison between the simulated and experimental data of this uncontrolled satellite highlights the performance of this new predictive tool.

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Section: Previous Workmentioning

confidence: 99%

Hyperspectral optical modeling of resident space objects at high spatial resolution

Coiro,

Tricoli,

Margall

et al. 2024

Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imaging XXX

View full text Add to dashboard Cite

show abstract

“…Apparent magnitude is a measure of brightness of different objects (stars, satellites, etc.) observed from Earth, where the brighter the object is, the apparent magnitude of it is lower [55], [56]. ≈ 2.512 also known as Pogson's Ratio [55]- [58].…”

Section: Iv: Low-albedo Coatingmentioning

confidence: 99%

Darkening Low-Earth Orbit Satellite Constellations: A Review

et al. 2022

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The proliferation of low-earth orbit (LEO) satellites and the LEO satellite internet will be a game-changer for the low-latency high-speed global internet. While this new generation of the satellite internet in conjunction with fifth generation network (5G) and sixth generation network (6G) enabled emerging technologies, such as precision farming and smart cities, it will bring new challenges, such as satellite collision, limited satellite lifespan, security concerns, and satellite brightness. This article discusses the satellite brightness caused by LEO constellations that potentially affect the ongoing astronomical studies. It reviews the underlying contributors to the satellite brightness as well as the state-of-the-art technologies proposed to mitigate this emerging challenge.

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What causes the abrupt changes in the light curve of a GEO satellite?

Wang

Zhao

et al. 2018

Acta Astronautica

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Apparent magnitude calculation method for complex shaped space objects

Cited by 3 publications

References 16 publications

Hyperspectral optical modeling of resident space objects at high spatial resolution

Hyperspectral optical modeling of resident space objects at high spatial resolution

Darkening Low-Earth Orbit Satellite Constellations: A Review

What causes the abrupt changes in the light curve of a GEO satellite?

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