| # Data sources and acknowledgments |
|
|
| ## Cassini ISS / NASA |
|
|
| The Cassini-derived `real` branch uses observations from the **Imaging Science |
| Subsystem (ISS)** of the **Cassini-Huygens mission**. Cassini ISS comprises |
| narrow-angle and wide-angle imaging cameras. The underlying spacecraft |
| observations are credited to **NASA / JPL-Caltech / Space Science Institute**. |
|
|
| Official source and archive references: |
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|
| - [NASA: Cassini-Huygens mission](https://science.nasa.gov/mission/cassini/) |
| - [NASA Planetary Data System (PDS)](https://pds.nasa.gov/) |
| - [PDS Ring-Moon Systems Node: Cassini ISS data archive](https://pds-rings.seti.org/cassini/iss/) |
| - [PDS OPUS archive search](https://opus.pds-rings.seti.org/) |
| - [JPL image-use policy](https://www.jpl.nasa.gov/jpl-image-use-policy/) |
|
|
| These are the upstream mission and archive references, not a claim that NASA |
| produced or endorsed the ASTRA-SR benchmark. Retain any additional credit |
| specified for individual source products. |
|
|
| ## ASTRA-SR processing |
|
|
| The ASTRA-SR authors curated and preprocessed the clean-source images, formed |
| the 512x512 / 256x256 resampled pairs, and synthesized spatially varying blur |
| and Gaussian noise under the frozen protocol. The release contains float32 |
| FITS arrays, source-ID split assignments and per-sample protocol/PSF hashes. |
| It is a processed research dataset, not an unmodified mirror of NASA raw |
| products. Source names remain in `dataset_index.jsonl` and the historical |
| `source_manifest_strict_v2_x2_v1.jsonl`. |
|
|
| Suggested credit when using this release: |
|
|
| > ASTRA-SR dataset and processing: Xining Ge, Ziteng Cui and Shuhong Liu. |
| > Cassini ISS source observations: NASA / JPL-Caltech / Space Science Institute. |
| > Archive reference: NASA Planetary Data System, Ring-Moon Systems Node. |
|
|
| Also cite [ASTRA-SR, arXiv:2609.26731](https://arxiv.org/abs/2609.26731), link |
| the dataset and [CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/), |
| and describe any further modifications you make. |
|
|
| ## Other inputs and scope |
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|
| The auxiliary `png` branch is a separate historical source collection; this |
| notice does **not** label every `png` sample as NASA/Cassini imagery. Its full |
| upstream source/license mapping is still pending maintainer verification. |
| The MASS atmospheric-observation CSV and the full PSF-bank population are |
| also not bundled here. Exact archive-product/download-version mappings are |
| not reconstructed merely from the processed FITS filenames. |
|
|
| The noncommercial project license applies only to the authors' licensable |
| contributions. Original NASA/Cassini and other third-party material retain |
| their applicable source terms; see [LICENSE_SCOPE.md](LICENSE_SCOPE.md). |
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|
