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Design of RIS-UAV-Assisted LEO Satellite Constellation Communication
Wenfei Yao, Xiaoming Chen, Qi Wang, Xingyu Peng
https://arxiv.org/abs/2509.04136 https://

Design of RIS-UAV-Assisted LEO Satellite Constellation Communication
Low Earth orbit (LEO) satellite constellations play a pivotal role in sixth-generation (6G) wireless networks by providing global coverage, massive connections, and huge capacity. In this paper, we present a novel LEO satellite constellation communication framework, where a reconfigurable intelligent surface-mounted unmanned aerial vehicle (RIS-UAV) is deployed to improve the communication quality of multiple terrestrial user equipments (UEs) under the condition of long distance between satelli…

Using Deep Learning to Identify Artificial Satellite Trails in Multi-band Photometric Astronomical Images
Hua-Jian Yu, Jia-Lei Zheng, Yuan Fang
https://arxiv.org/abs/2509.04081 …

Using Deep Learning to Identify Artificial Satellite Trails in Multi-band Photometric Astronomical Images
This research addresses the growing challenge of artificial satellite trail interference in ground-based astronomical observations by developing an efficient deep learning identification method. With the proliferation of satellite constellations in low Earth orbit, accurate detection of satellite trails has become crucial for preserving astronomical data quality. Using multi-band photometric survey observational data from the $Multi-channel$ $Photometric$ $Survey$ $Telescope$ (Mephisto) of Yunn…

Homophily-induced Emergence of Biased Structures in LLM-based Multi-Agent AI Systems
Aliakbar Mehdizadeh, Martin Hilbert
https://arxiv.org/abs/2510.02637 https://

Homophily-induced Emergence of Biased Structures in LLM-based Multi-Agent AI Systems
This study examines how interactions among artificially intelligent (AI) agents, guided by large language models (LLMs), drive the evolution of collective network structures. We ask LLM-driven agents to grow a network by informing them about current link constellations. Our observations confirm that agents consistently apply a preferential attachment mechanism, favoring connections to nodes with higher degrees. We systematically solicited more than a million decisions from four different LLMs, …

Continuing the #ag2025goerlitz coverage with a picture from #Euclid towel for solving the @… conference #puzzler https://www.g-vo.org/puzzlerweb/puzzler2025-solution.pdf - we had actually just stared at the constellation boundaries in https://iauarchive.eso.org/public/themes/constellations/ for a while and guessed correctly. ;-)

Graph Theory Meets Federated Learning over Satellite Constellations: Spanning Aggregations, Network Formation, and Performance Optimization
Fardis Nadimi, Payam Abdisarabshali, Jacob Chakareski, Nicholas Mastronarde, Seyyedali Hosseinalipour
https://arxiv.org/abs/2509.24932

Graph Theory Meets Federated Learning over Satellite Constellations: Spanning Aggregations, Network Formation, and Performance Optimization
We introduce Fed-Span, a novel federated/distributed learning framework designed for low Earth orbit satellite constellations. By leveraging graph-theoretic principles, Fed-Span addresses critical challenges inherent to distributed learning in dynamic satellite networks, including intermittent satellite connectivity, heterogeneous computational capabilities of satellites, and time-varying satellites' datasets. At its core, Fed-Span builds upon minimum spanning tree (MST) and minimum spanning fo…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
New Constellations:
🎵 Hot Blooded
#NewConstellations
https://open.spotify.com/track/2FdHXMMJuJVpfw3nIToLRI

Fault-tolerant Model Predictive Control for Spacecraft
Raphael St\"ockner, Pedro Roque, Maria Charitidou, Dimos V. Dimarogonas
https://arxiv.org/abs/2509.02527 https://

Fault-tolerant Model Predictive Control for Spacecraft
Given the cost and critical functions of satellite constellations, ensuring mission longevity and safe decommissioning is essential for space sustainability. This article presents a Model Predictive Control for spacecraft trajectory and setpoint stabilization under multiple actuation failures. The proposed solution allows us to efficiently control the faulty spacecraft enabling safe navigation towards servicing or collision-free trajectories. The proposed scheme ensures closed-loop asymptotic s…

MegaCacheX: Towards Cost-Effective Hierarchical Collaborative Content Caching in Emerging Mega-Constellations
Haoyang Shi, Xing Zhang, Sitong Li, Minghang Li, Xinming Lu, Shaoxiang Xu, Guoquan Wang
https://arxiv.org/abs/2508.20433

MegaCacheX: Towards Cost-Effective Hierarchical Collaborative Content Caching in Emerging Mega-Constellations
Significant latency in global content delivery primarily arises from insufficient terrestrial infrastructure. Deploying space-based content delivery networks within emerging mega-constellations provides an effective means to bridge the digital divide. However, space-based caching faces constraints from physical-layer dynamics, including dynamic topologies, time-varying inter-satellite link conditions, and limited onboard energy. In addition, existing mechanisms often lack fine-grained content c…

Leveraging Orbital Dynamics with RF Signal Features for Satellite Multi-Orbit Proximity Threat Detection
Anouar Boumeftah, Gunes Karabulut Kurt
https://arxiv.org/abs/2509.01802 …

Leveraging Orbital Dynamics with RF Signal Features for Satellite Multi-Orbit Proximity Threat Detection
Proximity-based interference is a growing threat to satellite communications, driven by dense multi-orbit constellations and increasingly agile adversarial maneuvers. We propose a hybrid simulation framework that integrates orbital maneuver modeling with RF signal degradation analysis to detect and classify suspicious proximity operations. Using the open-source Maneuver Detection Data Generation (MaDDG) library from MIT Lincoln Laboratory, we generate labeled datasets combining impulsive maneuv…

🔊 #NowPlaying on #BBCRadio3:
#NewMusicShow
- Constellations at BCMG
Tom Service presents world premieres by Zubin Kanga and Anne Castex from the Constellations concert, given by Zubin, the Birmingham Contemporary Music Group and L'Instant Donné.
Relisten now 👇
https://www.bbc.co.uk/programmes/m002g1gz

Cultural Constellations: A Journal of Literature and Art https://call-for-papers.sas.upenn.edu/cfp/2025/08/20/cultural-constellations-a-journal-of-literature-and-art

Green Traffic Engineering for Satellite Networks Using Segment Routing Flexible Algorithm
Jintao Liang, Pablo G. Madoery, Chung-Horng Lung, Halim Yanikomeroglu, Gunes Karabulut Kurt
https://arxiv.org/abs/2509.02149

Green Traffic Engineering for Satellite Networks Using Segment Routing Flexible Algorithm
Large-scale low-Earth-orbit (LEO) constellations demand routing that simultaneously minimizes energy, guarantees delivery under congestion, and meets latency requirements for time-critical flows. We present a segment routing over IPv6 (SRv6) flexible algorithm (Flex-Algo) framework that consists of three logical slices: an energy-efficient slice (Algo 130), a high-reliability slice (Algo 129), and a latency-sensitive slice (Algo 128). The framework provides a unified mixed-integer linear progra…

Replaced article(s) found for cs.IT. https://arxiv.org/list/cs.IT/new
[1/1]:
- Stochastic Geometry and Dynamical System Analysis of Walker Satellite Constellations
Chang-Sik Choi, Francois Baccelli

"Don’t look up: how Trump’s deregulation drive could obscure the stars and threaten our access to space"
https://www.theguardian.com/science/2025/sep/26/trump-rocket-launches-executive-order-threatens-sta…

Bitcoin as an Interplanetary Monetary Standard with Proof-of-Transit Timestamping
Jose E. Puente, Carlos Puente
https://arxiv.org/abs/2508.20591 https://ar…

Bitcoin as an Interplanetary Monetary Standard with Proof-of-Transit Timestamping
We explore the feasibility of deploying Bitcoin as the shared monetary standard between Earth and Mars, accounting for physical constraints of interplanetary communication. We introduce a novel primitive, Proof-of-Transit Timestamping (PoTT), to provide cryptographic, tamper-evident audit trails for Bitcoin data across high-latency, intermittently-connected links. Leveraging Delay/Disruption-Tolerant Networking (DTN) and optical low-Earth-orbit (LEO) mesh constellations, we propose an architect…

Intelligent Spectrum Management in Satellite Communications
Rakshitha De Silva, Shiva Raj Pokhrel, Jonathan Kua, Sithamparanathan Kandeepan
https://arxiv.org/abs/2509.00286 http…

Intelligent Spectrum Management in Satellite Communications
Satellite Communication (SatCom) networks represent a fundamental pillar in modern global connectivity, facilitating reliable service and extensive coverage across a plethora of applications. The expanding demand for high-bandwidth services and the proliferation of mega satellite constellations highlight the limitations of traditional exclusive satellite spectrum allocation approaches. Cognitive Radio (CR) leading to Cognitive Satellite (CogSat) networks through Dynamic Spectrum Management (DSM…

Robust Live Streaming over LEO Satellite Constellations: Measurement, Analysis, and Handover-Aware Adaptation
Hao Fang, Haoyuan Zhao, Jianxin Shi, Miao Zhang, Guanzhen Wu, Yi Ching Chou, Feng Wang, Jiangchuan Liu
https://arxiv.org/abs/2508.13402

Robust Live Streaming over LEO Satellite Constellations: Measurement, Analysis, and Handover-Aware Adaptation
Live streaming has experienced significant growth recently. Yet this rise in popularity contrasts with the reality that a substantial segment of the global population still lacks Internet access. The emergence of Low Earth orbit Satellite Networks (LSNs), such as SpaceX's Starlink and Amazon's Project Kuiper, presents a promising solution to fill this gap. Nevertheless, our measurement study reveals that existing live streaming platforms may not be able to deliver a smooth viewing experience on…

Data Transmission over a Bosonic Arbitrarily Varying Quantum Channel
Janis N\"otzel, Florian Seitz
https://arxiv.org/abs/2507.18259 https://arxiv.org/…

Data Transmission over a Bosonic Arbitrarily Varying Quantum Channel
Arbitrarily varying channels offer a powerful framework for analyzing the robustness of quantum communication systems, especially for classical-quantum models, where the analysis displays strengths or weaknesses of specific signal constellations under generic attacks. In this work, we provide a coding theorem for a large class of practically relevant arbitrarily varying channel models. Namely, we give an explicit capacity formula for the lossy bosonic channel subject to semi-classical attacks, …

Stochastic Channel Models for Satellite Mega-Constellations
Brendon McBain, Yi Hong, Emanuele Viterbo
https://arxiv.org/abs/2507.20255 https://arxiv.org/pd…

Stochastic Channel Models for Satellite Mega-Constellations
A general satellite channel model is proposed for communications between a rapidly moving low Earth orbit (LEO) satellite in a mega-constellation and a stationary user on Earth. The channel uses a non-homogeneous binomial point process (NBPP) for modelling the satellite positions, marked with an ascending/descending binary random variable for modelling the satellite directions. Using the marked NBPP, we derive the probability distributions of power gain, propagation delay, and Doppler shift, re…

Constellations are just old-school hallucinations.

Distributed Integrated Sensing, Localization, and Communications over LEO Satellite Constellations
Yuchen Zhang, Francis Soualle, Musa Furkan Keskin, Yuan Liu, Linlong Wu, Jos\'e A. del Peral-Rosado, Bhavani Shankar M. R., Gonzalo Seco-Granados, Henk Wymeersch, Tareq Y. Al-Naffouri
https://arxiv.org/abs/2508.11029

Distributed Integrated Sensing, Localization, and Communications over LEO Satellite Constellations
Low Earth orbit (LEO) satellite constellations are rapidly becoming essential enablers of next-generation wireless systems, offering global broadband access, high-precision localization, and reliable sensing beyond terrestrial coverage. However, the inherent limitations of individual LEO satellites, including restricted power, limited antenna aperture, and constrained onboard processing, hinder their ability to meet the growing demands of 6G applications. To address these challenges, this artic…

Shapes of Cognition for Computational Cognitive Modeling
Marjorie McShane, Sergei Nirenburg, Sanjay Oruganti, Jesse English
https://arxiv.org/abs/2509.13288 https://

Shapes of Cognition for Computational Cognitive Modeling
Shapes of cognition is a new conceptual paradigm for the computational cognitive modeling of Language-Endowed Intelligent Agents (LEIAs). Shapes are remembered constellations of sensory, linguistic, conceptual, episodic, and procedural knowledge that allow agents to cut through the complexity of real life the same way as people do: by expecting things to be typical, recognizing patterns, acting by habit, reasoning by analogy, satisficing, and generally minimizing cognitive load to the degree si…

Dynamic Activation and Assignment of SDN Controllers in LEO Satellite Constellations
Wafa Hasanain, Pablo G. Madoery, Halim Yanikomeroglu, Gunes Karabulut Kurt, Sameera Siddiqui, Stephane Martel, Khaled Ahmed, Colin Bellinger
https://arxiv.org/abs/2507.16774

Dynamic Activation and Assignment of SDN Controllers in LEO Satellite Constellations
Software-defined networking (SDN) has emerged as a promising approach for managing traditional satellite communication. This enhances opportunities for future services, including integrating satellite and terrestrial networks. In this paper, we have developed an SDN-enabled framework for Low Earth Orbit (LEO) satellite networks, incorporating the OpenFlow protocol, all within an OMNeT++ simulation environment. Dynamic controller assignment is one of the most significant challenges for large LEO…

Centralized vs. Decentralized Security for Space AI Systems? A New Look
Noam Schmitt (IP Paris, TSP, ENS Paris Saclay), Marc Antoine Lacoste
https://arxiv.org/abs/2509.20395 htt…

Centralized vs. Decentralized Security for Space AI Systems? A New Look
This paper investigates the trade-off between centralized and decentralized security management in constellations of satellites to balance security and performance. We highlight three key AI architectures for automated security management: (a) centralized, (b) distributed and (c) federated. The centralized architecture is the best option short term, providing fast training, despite the hard challenge of the communication latency overhead across space. Decentralized architectures are better alte…

need to relentlessly travel around the entire world till my spirit ascends and becomes embodied in constellations used for spiritual practices by the dene peoples of alaska and northwest canada

The Small-World Beneath LEO Satellite Coverage: Ground Hubs in Multi-Shell Constellations
Hailong Su, Jinshu Su, Yusheng Xia, Haibin Li
https://arxiv.org/abs/2508.14335 https://…

The Small-World Beneath LEO Satellite Coverage: Ground Hubs in Multi-Shell Constellations
In recent years, the emergence of large-scale Low-Earth-Orbit (LEO) satellite constellations has introduced unprecedented opportunities for global connectivity. However, routing efficiency and inter-shell communication remain key challenges in multi-shell architectures. This paper investigates the structural properties and network dynamics of a representative six-shell mega-constellation composed of 10,956 satellites and 198 gateway stations (GSs). Leveraging tools from complex network analysis…

🇺🇦 #NowPlaying on KEXP's #MiddayShow
Suzzallo:
🎵 Constellations
#Suzzallo
https://suzzallo.bandcamp.com/track/constellations-2
https://open.spotify.com/track/2lS6JUfgIjxtx4kJKxJz0n

Analysis and Design of Spare Strategy for Large-Scale Satellite Constellation Using Markov Chain
Seungyeop Han, Zachary Grieser, Shoji Yoshikawa, Takumi Noro, Takumi Suda, Koki Ho
https://arxiv.org/abs/2509.09957

Analysis and Design of Spare Strategy for Large-Scale Satellite Constellation Using Markov Chain
This paper presents a method for analyzing and designing an optimal spare-management policy in large-scale satellite constellations using a Markov chain model. To capture the stochastic nature of satellite failures and launch vehicle lead times, we adopt Markov chains to model both failure and replenishment processes. We reinvestigate an indirect spare strategy, modeled as a multi-echelon periodic-review reorder-point/order-quantity policy, in which spares are first delivered to parking orbits …

Onboard Neuromorphic Split Computing via Optical Links for LEO Remote Sensing
Zihang Song, Petar Popovski
https://arxiv.org/abs/2507.08490 https://

Onboard Neuromorphic Split Computing via Optical Links for LEO Remote Sensing
Low Earth orbit (LEO) satellite constellations increasingly require onboard intelligence under strict power and communication constraints. This paper proposes a neuromorphic split computing framework tailored for hierarchical LEO systems, where edge satellites perform event-driven sensing using dynamic vision sensors (DVS) and lightweight spiking neural network (SNN) encoders, while core satellites conduct inference using a powerful SNN decoder. A learned spike mapping scheme enables direct tra…

Cultural Constellations: A Journal of Literature and Art
https://ift.tt/MRYhuCv
updated: Saturday, August 23, 2025 - 8:01amfull name / name of organization: University of Maryland…
via Input 4 RELCFP

sat-QFL: Secure Quantum Federated Learning for Low Orbit Satellites
Dev Gurung, Shiva Raj Pokhrel
https://arxiv.org/abs/2509.16504 https://arxiv.org/pdf/25…

sat-QFL: Secure Quantum Federated Learning for Low Orbit Satellites
Low Earth orbit (LEO) constellations violate core assumptions of standard (quantum) federated learning (FL): client-server connectivity is intermittent, participation is time varying, and latency budgets are strict. We present sat-QFL, a hierarchical, access aware quantum federated learning (QFL) framework that partitions satellites into primary (ground connected) and secondary as inter-satellite links (ISL-only) roles, and schedules sequential, simultaneous, or asynchronous edge training align…

Learning Zero Constellations for Binary MOCZ in Fading Channels
Anthony Joseph Perre, Parker Huggins, Alphan Sahin
https://arxiv.org/abs/2508.08571 https://

Learning Zero Constellations for Binary MOCZ in Fading Channels
In this work, we propose two methods to design zero constellations for binary modulation on conjugate-reciprocal zeros (BMOCZ). In the first approach, we treat constellation design as a multi-label binary classification problem and learn the zero locations for a direct zero-testing (DiZeT) decoder. In the second approach, we introduce a neural network (NN)-based decoder and jointly learn the decoder and zero constellation parameters. We show that the NN-based decoder can directly generalize to …

Sustainability or Survivability? Eliminating the Need to Choose in LEO Satellite Constellations
Chris Misa, Ramakrishnan Durairajan
https://arxiv.org/abs/2508.17763 https://

Sustainability or Survivability? Eliminating the Need to Choose in LEO Satellite Constellations
LEO Satellite Networks (LSNs) are revolutionizing global connectivity, but their reliance on tens of thousands of satellites raises pressing concerns over sustainability and survivability. In this work, we argue that the inefficiencies in LSN designs stem from ignoring the strong spatiotemporal structure of Internet traffic demand (which impacts sustainability) and the physical realities of the near-Earth space environment (which affects survivability). We propose a novel design approach based …

Recoil-Constrained Scheduling of Non-Propulsive Payload Deployment for Mega-Constellations
Li Zhengrui, Li wenhao, Feng Guanhua, Yue Yuxian
https://arxiv.org/abs/2507.08251

Recoil-Constrained Scheduling of Non-Propulsive Payload Deployment for Mega-Constellations
This paper addresses the significant challenge of recoil momentum accumulation during non-propulsive payload deployment for low-Earth-orbit mega-constellations. An efficient phase-based approximation algorithm is introduced, leading to over 90% faster computation while maintaining maximum ejection velocity errors below 1%. The analysis highlights that cumulative recoil velocity is the primary factor governing deployment capability, with excess velocity being approximately half of the cumulative…

Joint Contact Planning for Navigation and Communication in GNSS-Libration Point Systems
Huan Yan, Juan A. Fraire, Ziqi Yang, Kanglian Zhao, Wenfeng Li, Xiyun Hou, Haohan Li, Yuxuan Miao, Jinjun Zheng, Chengbin Kang, Huichao Zhou, Xinuo Chang, Lu Wang, Linshan Xue
https://arxiv.org/abs/2508.20479

Joint Contact Planning for Navigation and Communication in GNSS-Libration Point Systems
Deploying satellites at Earth-Moon Libration Points (LPs) addresses the inherent deep-space coverage gaps of low-altitude GNSS constellations. Integrating LP satellites with GNSS into a joint constellation enables a more robust and comprehensive Positioning, Navigation, and Timing (PNT) system, while also extending navigation and communication services to spacecraft operating in cislunar space (i.e., users). However, the long propagation delays between LP satellites, users, and GNSS satellites …

Report on LEO satellite impacts on ground-based optical astronomy for the Rubin Observatory LSST
Phanindra Kandula, Lee Kelvin, Erfan Nourbakhsh, Daniel Polin, Tom Prince, Meredith Rawls, Adam Snyder, Brianna Smart, Christopher Stubbs, Anthony Tyson, Zeljko Ivezic, Craig Lage, Clare Saunders
https://arxiv.org/abs/2509.19758

Report on LEO satellite impacts on ground-based optical astronomy for the Rubin Observatory LSST
In August 2025 a workshop was convened to bring together experts to better understand steps that can be taken to mitigate the impact of satellite constellations on astronomical observations. At the time, just over 12,000 operational satellites were in low-Earth orbit (LEO). Although reflected sunlight and emissions all across the electromagnetic spectrum from artificial satellites impact scientific observations and the sky, the workshop focused on reflected sunlight in the wavelength range 330 …

High-Capacity and Low-PAPR BICM-OFDM Systems Using Non-Equiprobable and Non-Uniform Constellation Shaping With Clipping and Filtering
Eito Kurihara, Hideki Ochiai
https://arxiv.org/abs/2508.15639

High-Capacity and Low-PAPR BICM-OFDM Systems Using Non-Equiprobable and Non-Uniform Constellation Shaping With Clipping and Filtering
We address a design of high-capacity and low-peak-to-average power ratio (PAPR) orthogonal frequency-division multiplexing (OFDM) systems based on bit-interleaved coded modulation (BICM) utilizing non-equiprobable and non-uniform (NENU) constellations as well as clipping and filtering (CAF). The proposed constellations are generated using a truncated Gaussian distribution, and the merging of constellation points, where the former creates a non-uniform constellation (NUC), and the latter decreas…

Ground-Based Verification Method for Pointing and Acquisition Performance of Space Optical Communication System with Sub-Second Acquisition Time
Jianmin Wang, Zhiqian Su, Bin Li, Weiran Zheng, Haochun Gao
https://arxiv.org/abs/2508.08950

Ground-Based Verification Method for Pointing and Acquisition Performance of Space Optical Communication System with Sub-Second Acquisition Time
To meet the urgent need for sub-second link establishment in inter-satellite and satellite-to-ground free space optical communication, this paper presents a periscope-type optical communication terminal and a ground-based verification scheme for its pointing accuracy and acquisition performance, thereby avoiding costly in-orbit tests. This ground-based measurement method takes the positions of stellar constellations in inertial space as its reference. By establishing a theoretical attitude dete…

Enhancing Mega-Satellite Networks with Generative Semantic Communication: A Networking Perspective
Binquan Guo, Wanting Yang, Zehui Xiong, Zhou Zhang, Baosheng Li, Zhu Han, Rahim Tafazolli, Tony Q. S. Quek
https://arxiv.org/abs/2508.07573

Enhancing Mega-Satellite Networks with Generative Semantic Communication: A Networking Perspective
The advance of direct satellite-to-device communication has positioned mega-satellite constellations as a cornerstone of 6G wireless communication, enabling seamless global connectivity even in remote and underserved areas. However, spectrum scarcity and capacity constraints imposed by the Shannon's classical information theory remain significant challenges for supporting the massive data demands of multimedia-rich wireless applications. Generative Semantic Communication (GSC), powered by artif…

Towards In-Air Ultrasonic QR Codes: Deep Learning for Classification of Passive Reflector Constellations
Wouter Jansen, Jan Steckel
https://arxiv.org/abs/2509.06615 https://

Towards In-Air Ultrasonic QR Codes: Deep Learning for Classification of Passive Reflector Constellations
In environments where visual sensors falter, in-air sonar provides a reliable alternative for autonomous systems. While previous research has successfully classified individual acoustic landmarks, this paper takes a step towards increasing information capacity by introducing reflector constellations as encoded tags. Our primary contribution is a multi-label Convolutional Neural Network (CNN) designed to simultaneously identify multiple, closely spaced reflectors from a single in-air 3D sonar me…

orb-QFL: Orbital Quantum Federated Learning
Dev Gurung, Shiva Raj Pokhrel
https://arxiv.org/abs/2509.16505 https://arxiv.org/pdf/2509.16505

orb-QFL: Orbital Quantum Federated Learning
Recent breakthroughs in quantum computing present transformative opportunities for advancing Federated Learning (FL), particularly in non-terrestrial environments characterized by stringent communication and coordination constraints. In this study, we propose orbital QFL, termed orb-QFL, a novel quantum-assisted Federated Learning framework tailored for Low Earth Orbit (LEO) satellite constellations. Distinct from conventional FL paradigms, termed orb-QFL operates without centralized servers or…

Global Optimization of Multi-Flyby Trajectories for Multi-Orbital-Plane Constellations Inspection
An-Yi Huang, Hong-Xin Shen, Zhao Li, Cong Sun, Chao Sheng, Zheng-Zhong Kuai
https://arxiv.org/abs/2507.02943

Global Optimization of Multi-Flyby Trajectories for Multi-Orbital-Plane Constellations Inspection
The rapid expansion of mega-constellations in low Earth orbits has posed significant challenges to space traffic management, necessitating periodic inspections of satellites to ensure the sustainability of the space environment when economically feasible. This study addresses the orbital design challenge associated with inspecting numerous satellites distributed across multiple orbital planes through flybys by proposing an innovative orbital-plane-based inspection strategy. The proposed methodo…

🇺🇦 #NowPlaying on KEXP's #AfternoonShow
New Constellations:
🎵 Hot Blooded
#NewConstellations
https://open.spotify.com/track/2FdHXMMJuJVpfw3nIToLRI

Cultural Constellations: A Journal of Literature and Art
https://ift.tt/wqFEoti
updated: Saturday, August 23, 2025 - 8:01amfull name / name of organization: University of Maryland…
via Input 4 RELCFP

DSROQ: Dynamic Scheduling and Routing for QoE Management in LEO Satellite Networks
Dhiraj Bhattacharjee, Pablo G. Madoery, Abhishek Naik, Halim Yanikomeroglu, Gunes Karabulut Kurt, Stephane Martel, Khaled Ahmed
https://arxiv.org/abs/2508.21047

DSROQ: Dynamic Scheduling and Routing for QoE Management in LEO Satellite Networks
The modern Internet supports diverse applications with heterogeneous quality of service (QoS) requirements. Low Earth orbit (LEO) satellite constellations offer a promising solution to meet these needs, enhancing coverage in rural areas and complementing terrestrial networks in urban regions. Ensuring QoS in such networks requires joint optimization of routing, bandwidth allocation, and dynamic queue scheduling, as traffic handling is critical for maintaining service performance. This paper for…

Space Environment and Debris: A Review of Micro-Meteoroids and Orbital Debris Impact Protection
Binkal Kumar Sharma, Harshitha Baskar
https://arxiv.org/abs/2508.03957 https://…

Space Environment and Debris: A Review of Micro-Meteoroids and Orbital Debris Impact Protection
The threat posed by MMOD to spacecraft has escalated with the growing density of orbital objects, driven by the proliferation of satellite constellations such as Starlink and OneWeb. This paper reviews the current challenges and advancements in MMOD impact protection, emphasizing innovations in shielding technologies. The synthesis of recent developments highlights the role of hybrid materials, additive manufacturing, and international collaboration in ensuring spacecraft resilience while promo…

Insights into Xona Pulsar LEO PNT: Constellation, Signals, and Receiver Design
J\'er\^ome Lecl\`ere, Thyagaraja Marathe, Tyler G. R. Reid
https://arxiv.org/abs/2509.19551 ht…

Insights into Xona Pulsar LEO PNT: Constellation, Signals, and Receiver Design
The landscape of global navigation satellite systems (GNSS) is expanding with the emergence of low Earth orbit (LEO) constellations such as Pulsar, which are expected to play a key role in the future of positioning, navigation, and timing (PNT). LEO-based systems provide advantages including stronger signals for greater robustness, faster dynamics that aid convergence and multipath mitigation, and shorter time to first fix (TTFF) enabled by high data rates. These benefits, however, come with ch…

Resilience of Mega-Satellite Constellations: How Node Failures Impact Inter-Satellite Networking Over Time?
Binquan Guo, Zehui Xiong, Zhou Zhang, Baosheng Li, Dusit Niyato, Chau Yuen, Zhu Han
https://arxiv.org/abs/2509.06766

Resilience of Mega-Satellite Constellations: How Node Failures Impact Inter-Satellite Networking Over Time?
Mega-satellite constellations have the potential to leverage inter-satellite links to deliver low-latency end-to-end communication services globally, thereby extending connectivity to underserved regions. However, harsh space environments make satellites vulnerable to failures, leading to node removals that disrupt inter-satellite networking. With the high risk of satellite node failures, understanding their impact on end-to-end services is essential. This study investigates the importance of i…

Space Shift Keying-Enabled ISAC for Efficient Debris Detection and Communication in LEO Satellite Networks
Gedeon Ghislain Nkwewo Ngoufo, Khaled Humadi, Elham Baladi, Gunes Karabulut Kurt
https://arxiv.org/abs/2507.13526

Space Shift Keying-Enabled ISAC for Efficient Debris Detection and Communication in LEO Satellite Networks
The proliferation of space debris in low Earth orbit (LEO) presents critical challenges for orbital safety, particularly for satellite constellations. Integrated sensing and communication (ISAC) systems provide a promising dual function solution by enabling both environmental sensing and data communication. This study explores the use of space shift keying (SSK) modulation within ISAC frameworks, evaluating its performance when combined with sinusoidal and chirp radar waveforms. SSK is particul…

Analysis and Design of Spare Strategy for Large-Scale Satellite Constellation Using Direct Insertion under (r,q) Policy
Seungyeop Han, Zachary Grieser, Shoji Yoshikawa, Takumi Noro, Takumi Suda, Koki Ho
https://arxiv.org/abs/2509.10585

Analysis and Design of Spare Strategy for Large-Scale Satellite Constellation Using Direct Insertion under (r,q) Policy
This paper introduces a Markov chain-based approach for the analysis and optimization of spare-management policies in large-scale satellite constellations. Focusing on the direct strategy, we model spare replenishment as a periodic-review reorder-point/order-quantity policy, where spares are deployed directly to constellation planes. The stochastic behavior of satellite failures and launch vehicle lead times is captured through Markov representations of both failure and replenishment dynamics. …

Dora: A Controller Provisioning Strategy in Hierarchical Domain-based Satellite Networks
Qiyuan Peng, Qi Zhang, Yue Gao, Kun Qiu
https://arxiv.org/abs/2507.14512

Dora: A Controller Provisioning Strategy in Hierarchical Domain-based Satellite Networks
The rapid proliferation of satellite constellations in Space-Air-Ground Integrated Networks (SAGIN) presents significant challenges for network management. Conventional flat network architectures struggle with synchronization and data transmission across massive distributed nodes. In response, hierarchical domain-based satellite network architectures have emerged as a scalable solution, highlighting the critical importance of controller provisioning strategies. However, existing network managem…

Hybrid Table-Assisted and RL-Based Dynamic Routing for NGSO Satellite Networks
Flor Ortiz, Eva Lagunas
https://arxiv.org/abs/2509.14909 https://arxiv.org/p…

Hybrid Table-Assisted and RL-Based Dynamic Routing for NGSO Satellite Networks
This letter investigates dynamic routing in Next-Generation Satellite Orbit (NGSO) constellations and proposes a hybrid strategy that combines precomputed routing tables with a Deep Q-Learning (DQL) fallback mechanism. While fully RL-based schemes offer adaptability to topology dynamics, they often suffer from high complexity, long convergence times, and unstable performance under heavy traffic. In contrast, the proposed framework exploits deterministic table lookups under nominal conditions an…

CountingStars: Low-overhead Network-wide Measurement in LEO Mega-constellation Networks
Xiyuan Liu, Guano Liu, Xiucheng Tian, Wenting Wei
https://arxiv.org/abs/2508.13512 https:…

CountingStars: Low-overhead Network-wide Measurement in LEO Mega-constellation Networks
The high mobility of satellites in Low Earth Orbit (LEO) mega-constellations induces a highly dynamic network topology, leading to many problems like frequent service disruptions. To mitigate this, Packet-based Load Balancing (PBLB) is employed. However, this paradigm shift introduces two critical challenges for network measurement stemming from the requirement for port-level granularity: memory inflation and severe hash collisions. To tackle these challenges, we propose CountingStars, a low-ov…

A General Nonlinear Model for Arbitrary Modulation Formats in the Presence of Inter-Channel Simulated Raman Scattering
Zhiwei Liang, Bin Chen, Jiwei Xu, Yi Lei, Qingqing Hu, Fan Zhang, Gabriele Liga
https://arxiv.org/abs/2509.10009

A General Nonlinear Model for Arbitrary Modulation Formats in the Presence of Inter-Channel Simulated Raman Scattering
The four-dimensional nonlinear model is extended to include the inter-channel stimulated Raman scattering, enabling accurate prediction of dual-polarization four-dimensional modulation formats and probabilistically shaped constellations in high-dispersion regimes. The proposed model is validated via comparisons with the split-step Fourier method and enhanced Gaussian noise model.

Joint AoI and Handover Optimization in Space-Air-Ground Integrated Network
Zifan Lang, Guixia Liu, Geng Sun, Jiahui Li, Jiacheng Wang, Weijie Yuan, Dusit Niyato, Dong In Kim
https://arxiv.org/abs/2509.12716

Joint AoI and Handover Optimization in Space-Air-Ground Integrated Network
Despite the widespread deployment of terrestrial networks, providing reliable communication services to remote areas and maintaining connectivity during emergencies remains challenging. Low Earth orbit (LEO) satellite constellations offer promising solutions with their global coverage capabilities and reduced latency, yet struggle with intermittent coverage and limited communication windows due to orbital dynamics. This paper introduces an age of information (AoI)-aware space-air-ground integra…

Satellites are closer than you think: A near field MIMO approach for Ground stations
Rohith Reddy Vennam, Luke Wilson, Ish Kumar Jain, Dinesh Bharadia
https://arxiv.org/abs/2508.09374

Satellites are closer than you think: A near field MIMO approach for Ground stations
The rapid growth of low Earth orbit (LEO) satellite constellations has revolutionized broadband access, earth observation, and direct-to-device connectivity. However, the expansion of ground station infrastructure has not kept pace, creating a critical bottleneck in satellite-to-ground backhaul capacity. Traditional parabolic dish antennas, though effective for geostationary (GEO) satellites, are ill-suited for dense, fastmoving LEO networks due to mechanical steering delays and their inability…

Near-realtime Earth Observation Via Starlink LEO Satellite Constellation
Bo Wu (University of Pittsburgh), Pengfei Zhou (University of Pittsburgh)
https://arxiv.org/abs/2508.10338

Near-realtime Earth Observation Via Starlink LEO Satellite Constellation
Earth observation (EO) satellites in Low Earth Orbit (LEO) are collecting vast amounts of data, which are invaluable for applications such as monitoring forest fires. However, data downloading from EO satellites faces significant challenges due to the limited number of ground stations and the brief communication windows with them. Conversely, emerging LEO constellations like Starlink have enabled continuous connectivity and revolutionized access for ordinary users globally, who can connect via …

PHandover: Parallel Handover in Mobile Satellite Network
Jiasheng Wu, Shaojie Su, Wenjun Zhu, Xiong Wang, Jingjing Zhang, Xingqiu He, Yue Gao
https://arxiv.org/abs/2507.07437

PHandover: Parallel Handover in Mobile Satellite Network
The construction of Low Earth Orbit (LEO) satellite constellations has recently attracted tremendous attention from both academia and industry. The 5G and 6G standards have identified LEO satellite networks as a key component of future mobile networks. However, due to the high-speed movement of satellites, ground terminals often experience frequent and high-latency handovers, which significantly deteriorate the performance of latency-sensitive applications. To address this challenge, we propose…

Industrial Viewpoints on RAN Technologies for 6G
Mansoor Shafi, Erik G. Larsson, Xingqin Lin, Dorin Panaitopol, Stefan Parkvall, Flavien Ronteix-Jacquet, Antti Toskala
https://arxiv.org/abs/2508.08225 …

Industrial Viewpoints on RAN Technologies for 6G
6G standardization is to start imminently, with commercial deployments expected before 2030. Its technical components and performance requirements are the focus of this article. Our emphasis is on the 6G radio access, especially MIMO, AI, waveforms, coding, signal constellations and integration with non-terrestrial networks. Whilst standardization has not yet formally started, the scope of the 6G study items has been defined. Our predictions in this paper are speculative as there are no results…

OpenSN: An Open Source Library for Emulating LEO Satellite Networks
Wenhao Lu, Zhiyuan Wang, Hefan Zhang, Shan Zhang, Hongbin Luo
https://arxiv.org/abs/2507.03248

OpenSN: An Open Source Library for Emulating LEO Satellite Networks
Low-earth-orbit (LEO) satellite constellations (e.g., Starlink) are becoming a necessary component of future Internet. There have been increasing studies on LEO satellite networking. It is a crucial problem how to evaluate these studies in a systematic and reproducible manner. In this paper, we present OpenSN, i.e., an open source library for emulating large-scale satellite network (SN). Different from Mininet-based SN emulators (e.g., LeoEM), OpenSN adopts container-based virtualization, thus …