Publications associées à Constellation de satellites

Semantic Perturbations with Normalizing Flows for Improved Generalization

Martin Jaggi, Sebastian Urban Stich, Tatjana Chavdarova

Data augmentation is a widely adopted technique for avoiding overfitting when training deep neural networks. However, this approach requires domain-specific knowledge and is often limited to a fixed set of hard-coded transformations. Recently, several work ...

IEEE2021

Re-entry survival analysis and ground risk assessment of space debris considering by-products generation

Pénélope Leyland, Stefano Mischler, Seong-Hyeon Park

Space debris that re-enter the Earth's atmosphere can be partially or fully ablated along the trajectory path after hitting the atmosphere layers, once these become denser (approximately below 82 km). This paper combines re-entry survival analysis to by-pr ...

2020

QUIC: Opportunities and threats in SATCOM

Emmanuel Qays Dubois, Ludovic Bernard Gérard Thomas

This article proposes a discussion on the strengths, weaknesses, opportunities and threats related to the deployment of QUIC end-to-end from a satellite-operator point-of-view. The deployment of QUIC is an opportunity for improving the quality of experienc ...

IEEE2020

X-ray pulsar-based GNC system for formation flying in high Earth orbits

Volker Gass, Camille Sébastien Pirat

In this paper, comprehensive pulsar-based Guidance, Navigation and Control (GNC) system is designed and applied to satellites formation flying. The complete autonomy of the X-ray pulsar navigation technology provides both absolute and relative positioning ...

PERGAMON-ELSEVIER SCIENCE LTD2020

LDPC Coded Multiuser Shaping for the Gaussian Multiple Access Channel

Alexios Konstantinos Balatsoukas Stimming

The joint design of input constellation and low-density parity-check (LDPC) codes to approach the symmetric capacity of the two-user Gaussian multiple access channel is studied. More specifically, multilevel coding is employed at each user to construct a h ...

IEEE2019

Four-Port Broadband Orthomode Transducer Enabling Arbitrary Interelement Spacing

Juan Ramon Mosig, Anja Skrivervik, Emile Jacques de Rijk, Tomislav Debogovic, Maria Garcia Vigueras, Santiago Capdevila Cascante, Esteban Menargues Gomez

This paper reports a novel methodology to design broadband orthomode transducers with two arbitrarily spaced ports carrying orthogonal linear polarizations. The component is based on a combination of two Boifot junctions through a series of power dividers ...

2018

Compact Orthomode Transducer with Broadband Beamforming Capability

Juan Ramon Mosig, Anja Skrivervik, Emile Jacques de Rijk

A compact and broadband orthomode transducer (OMT) with two dual linearly polarized ports is reported here for the first time. The component is based on a combination of two ridged Boifot junctions through a series of power dividers that act as an embedded ...

IEEE2018

Cost-effective dual-polarised leaky-wave antennas enabled by three-dimensional printing

Juan Ramon Mosig, Emile Jacques de Rijk, Tomislav Debogovic, Maria Garcia Vigueras, Esteban Menargues Gomez

This study proposes a compact dual-polarised directive radiator whose complex prototyping is enabled by additive manufacturing. In addition to monolithic implementation, stereolitography followed by metal coating, it also provides high radio-frequency perf ...

Inst Engineering Technology-Iet2017

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Constellation de satellites

The imprint of galaxy mergers on satellite planes in a cosmological context

Semantic Perturbations with Normalizing Flows for Improved Generalization

Re-entry survival analysis and ground risk assessment of space debris considering by-products generation

Doppler-based positioning using LEO augmented satellite constellation - Simulations of perspectives

QUIC: Opportunities and threats in SATCOM

X-ray pulsar-based GNC system for formation flying in high Earth orbits

LDPC Coded Multiuser Shaping for the Gaussian Multiple Access Channel

Four-Port Broadband Orthomode Transducer Enabling Arbitrary Interelement Spacing

Compact Orthomode Transducer with Broadband Beamforming Capability

Cost-effective dual-polarised leaky-wave antennas enabled by three-dimensional printing

Graph Chatbot

Chattez avec Graph Search

The imprint of galaxy mergers on satellite planes in a cosmological context

X-ray pulsar-based GNC system for formation flying in high Earth orbits

Compact Orthomode Transducer with Broadband Beamforming Capability

Re-entry survival analysis and ground risk assessment of space debris considering by-products generation

Doppler-based positioning using LEO augmented satellite constellation - Simulations of perspectives

Cost-effective dual-polarised leaky-wave antennas enabled by three-dimensional printing

Semantic Perturbations with Normalizing Flows for Improved Generalization

QUIC: Opportunities and threats in SATCOM

Four-Port Broadband Orthomode Transducer Enabling Arbitrary Interelement Spacing

LDPC Coded Multiuser Shaping for the Gaussian Multiple Access Channel