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Earlier sources: Satellites
This space thread follows satellites through original research, public projects, and source reports. Read the evidence below to see which developments are represented in SYMTRI’s archive.
SYMTRI organizes observations from public sources into a living map. Connections reflect shared subject matter; they do not establish causation or endorse a source.
Open in the map ↗41 classified signals in the fourteen-day window. These counts include signals awaiting readable evidence.
Earlier sources
Up to ten sources with readable evidence, ordered by their feed timestamp. These archive sources can be older than the live fourteen-day window. This list is a sample, not a measure of total activity. Dates distinguish paper publication, repository creation, model/dataset activity, Hacker News posts, and KEV catalog additions. “First archived” records when SYMTRI first stored the signal.
- OpenAlex · Published · First archived
A Blind Architecture for Signal Combining in Distributed Satellite Communications ↗
To meet the increasing demand for high data rates in satellite communications (SATCOM), the requirements in terms of link quality and reliability are also increasing. Reception of SATCOM signals with multiple ground stations and combining them to increase the signal-to-noise ratio (SNR) provides a flexible and robust alternative to larger antenna dish sizes and higher transmit powers. In practical scenarios, the signals received at different ground stations may exhibit different time delays, phase/frequency offsets and noise powers. This might be due to movement of the satellite in low-earth o…
- arXiv · Published · First archived
Revisiting the Task of Building Damage Assessment by Satellite Imaging ↗
Natural disasters such as earthquakes, tropical storms, and floods cause extensive damage to buildings, and rapid, reliable damage maps are essential to guide emergency response. Automating this task, referred to as building damage assessment (BDA), from satellite imagery, has become an active research topic at the intersection of remote sensing, computer vision, and machine learning, particularly since supervised deep learning methods were shown to outperform earlier handcrafted approaches. Yet, despite a decade of intense activity and the release of several large-scale datasets, the field la…
- Hacker News · Posted on Hacker News · First archived
Applying NASA's satellite-imaging trick to ancient museum objects ↗
Hacker News discussion.
- arXiv · Published · First archived
Morphology-based retrieval of local wave parameters and phase shifts in satellite-observed atmospheric disturbances ↗
Currently available methods for processing atmospheric wave disturbances are often based on integral wavelet transform techniques, which efficiently estimate spectral data but are fundamentally limited by the uncertainty principle. To address this limitation, this work proposes a novel morphological approach based on partitioning spatial disturbance profiles into separate, well-defined wave segments. By focusing exclusively on the local waveform morphology of a central half-wave and its two adjacent out-of-phase counterparts, and taking the modified Morlet wavelet as a primary example of a mod…
- Hacker News · Posted on Hacker News · First archived
Amazon builds 1,000th satellite, will launch internet service by end of year ↗
Hacker News discussion.
- arXiv · Published · First archived
Size, Shape, and Geometric Albedo of Dwarf Planet Quaoar's Largest Satellite Weywot ↗
The small satellites of dwarf-planet size worlds in trans-Neptunian space are thought to be produced through giant impacts, and are typically observed to have bright water-ice-dominated surfaces. Here we focus on Quaoar's small primary satellite, Weywot. We build on previous work by re-analyzing the June 2023 stellar occultation by Weywot using results from 11 orbits of HST imaging with the Wide Field Camera 3. Weywot's rotational lightcurve was constrained along with its independent photometric phase curve, which we used to obtain more robust measurements of Weywot's size, shape, and geometri…
- OpenAlex · Published · First archived
Data-Driven Adjacency Correction from High-Contrast Satellite Imagery Using DeepWater as a Natural Reference Target ↗
The adjacency effect introduces spatial biases in high-resolution satellite imagery through atmospheric scattering of radiance from adjacent surfaces, particularly near sharp albedo contrasts such as ice-ocean boundaries. This study presents a data-driven approach for estimating the atmospheric point spread function directly from spaceborne observations over marine environments in both polar regions. Using optically deep ocean water as a natural reference target with known spatial homogeneity, an iterative inversion procedure minimizes reflectance variance to retrieve double Gaussian kernel pa…
- OpenAlex · Published · First archived
Scatter, bias, and chaos of satellite orbits in triaxial dark matter haloes ↗
Abstract The pericentric distances of satellite galaxies govern their tidal stripping, quenching, and survival, yet their orbits are almost universally computed in spherical host haloes, whereas dark matter haloes are generically triaxial. We quantify, orbit by orbit, the error this simplification incurs. We integrate 106 satellites, drawn from a cosmological infall distribution, in static NFW hosts of systematically varying triaxiality at fixed mass profile. Triaxiality leaves the population medians of pericentre, apocentre, and orbital period essentially unchanged. Instead, successive perice…
- arXiv · Published · First archived
Low-rank tensor structure of precipitation and its application to satellite-reference merging ↗
The intermittent and variable nature of precipitation makes its accurate estimation over extended domains difficult, yet its spatiotemporal structure suggests that a low-rank representation may be possible. This work represents daily precipitation over the contiguous United States (CONUS) as spatiotemporal tensors and applies CANDECOMP/PARAFAC factorization, showing that preserving the native spatial and temporal modes yields more accurate reconstruction than factorizing independent daily fields or unfolded space--time matrices. Building on this finding, this work presents TMerge, a tensor-bas…
- arXiv · Published · First archived
Systematic non-compliance of satellite megaconstellations with IAU brightness limits ↗
Satellite megaconstellations in low Earth orbit interfere with ground-based optical astronomy, but the scale of that interference has been hard to measure. Here we report an uncued photometric survey from a mid-northern latitude site in late 2024 which recorded some 25,000 tracks of 5,118 individual satellites to a limiting visual magnitude of +9.0. The observed population is systematically brighter than the altitude-adjusted limit of order seventh magnitude recommended by the International Astronomical Union Centre for the Protection of the Dark and Quiet Sky from Satellite Constellation Inte…
Live window recorded . This is the ingestion observation time, not the publication or discovery date of each source.
How to assess evidence about Satellites
Check each original source for its methods, release status, limitations, and supporting data. A repository announcement, a preprint, and a published study provide different kinds of evidence. SYMTRI’s subject classification helps discovery; it does not independently validate the source’s claims.
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