astro/NOTICE

本文件是第三方数据与条款声明。代码与文档采用 Apache-2.0；下列数据文件**不适用** Apache-2.0，各自遵循其来源条款。分发内嵌了这些数据的二进制（含 c-shared DLL/SO）时，须一并附上对应署名。
This file is the per-component licence and attribution notice. The code and documentation are Apache-2.0; the data files listed below are not, and each follows the terms of its own source. Distributing a binary that embeds them — including the c-shared DLL/SO build — requires carrying the corresponding attribution.

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1. SELENE (KAGUYA) lunar limb profile — moon/limb/kaguya_lalt.bin
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Source data
  SELENE Global Grid Topographic Data of the Moon (LALT_GGT_NUM), dataset
  sln-l-lalt-5-topo-ggt-num-v2.0, version 2.0, published 2017.
  Origin of the data: ISAS/JAXA.
  Provided by the SELENE (KAGUYA) Data Archive (DARTS), ISAS/JAXA:
    https://darts.isas.jaxa.jp/datasets/darts:sln-l-lalt-5-topo-ggt-num-v2.0
    https://data.darts.isas.jaxa.jp/pub/pds3/sln-l-lalt-5-topo-ggt-num-v2.0/

Acknowledgement, as requested by the SELENE Data Archive
  "We thank the SELENE(KAGUYA) LALT team and the SELENE Data Archive for
   providing the SELENE(KAGUYA) data. SELENE is a Japanese mission developed
   and operated by JAXA."

Modifications
  The original PDS3 fixed-width table (1/16 degree global grid, 2880 x 5760
  samples) was converted to a float32 elevation grid and then resampled into a
  limb-radius profile table: the limb height is tabulated on a 1 degree grid of
  selenographic (libration) longitude and latitude and on a 0.1 degree grid of
  position angle, taking max (R + h) cos(alpha) over a +/-9 degree arc for each
  direction. Values are quantized to 4 m, delta-encoded along longitude and
  latitude, and then stored in this project's own zlib-compressed LLB1
  container. No other changes were made.

Licence
  The source data are provided under the ISAS Data Policy,
    https://www.isas.jaxa.jp/en/researchers/data-policy/
  which states that its rules are compatible with Creative Commons Attribution
  4.0 International, https://creativecommons.org/licenses/by/4.0/
  This file is redistributed under the ISAS Data Policy. It is provided "as
  is", without warranties of any kind. ISAS/JAXA is not responsible for the
  actions of data users and does not endorse this project.

Embedding
  Compiled into the moon/limb package with //go:embed, and linked only when
  that package is imported. A copy of this section ships as moon/limb/NOTICE
  so that vendored copies of the package keep the attribution.

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2. Planetary and lunar theories — planet/internal/semianalytic/**/*.bin
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Upstream theories and authors
  VSOP2013 — planetary theory, Simon, Francou, Fienga & Manche (2013),
  distributed by IMCCE at https://ftp.imcce.fr/pub/ephem/planets/vsop2013/
  TOP2013 — planetary theory for the outer planets, IMCCE, distributed at
  https://ftp.imcce.fr/pub/ephem/planets/top2013/
  ELP/MPP02 — lunar theory, J. Chapront, M. Chapront & G. Francou, 2003,
  distributed by SYRTE, Observatoire de Paris (not through IMCCE's ftp server)
  at ftp://cyrano-se.obspm.fr/pub/2_lunar_solutions/2_elpmpp02/
  Its distribution README.TXT (December 2002) is purely scientific — authors,
  description, file list and references — and states no licence and no terms
  of use.
  Used by the legacy model as well:
  ELP2000-82B — earlier lunar solution, Chapront-Touzé & Chapront, distributed
  by IMCCE at https://ftp.imcce.fr/pub/ephem/moon/elp82b/
  VSOP87 — earlier planetary series, Bretagnon & Francou (1988).

What this project distributes
  Its own numerical refits of those theories' argument structure to the JPL
  DE440/DE441 ephemerides. The amplitudes in the *.bin tables are produced by
  this project's fitting pipeline; the upstream coefficient files are not
  redistributed here. Relative to the upstream theories the tables are
  modified in two ways: (1) the argument structure is truncated to the terms
  the fit retains, and (2) every amplitude is re-fitted to DE440/DE441 instead
  of being taken from the published series.

Published constants
  The argument phases and frequencies (the VSOP2013 "ll(1..17)" set) and the
  GM constants used by the generator are published in the VSOP2013 README.pdf
  distributed by IMCCE and in Simon, Francou, Fienga & Manche, A&A 557, A49
  (2013); for the Moon, in Chapront & Francou, A&A 404, 735 (2003).

Rights in the underlying theories
  This project can neither allow nor forbid the use of the VSOP2013, TOP2013,
  ELP/MPP02, ELP2000-82B or VSOP87 theories. Apache-2.0 covers only this
  project's own work — its code, and its compilation and rearrangement of the
  published series — and not the theories themselves. Downstream users who
  need to rely on the terms of the underlying theories should consult the IMCCE
  legal notice,
    https://www.imcce.fr/mentions-legales
  which restricts reproduction and makes commercial or professional use
  subject to IMCCE authorisation.

ELP/MPP02 terms
  The official ELP/MPP02 distribution ships README.TXT (December 2002) and the
  explanatory note elpmpp02.pdf; neither states a licence or terms of use, and
  no separate terms file is included. This project therefore treats ELP/MPP02
  as carrying no stated terms and relies on the disclaimer under "Rights in
  the underlying theories" above. Note also that IMCCE's ftp server carries
  only ELP2000-82B, not ELP/MPP02. Downstream users who need a formal position
  should consult SYRTE, https://syrte.obspm.fr/, and the IMCCE legal notice.

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3. JPL ephemerides — DE440 / DE441 and Horizons kernels
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Files
  basic/testdata/semianalytic/planet_apparent_de441.csv
  planet/internal/semianalytic/testdata/de441-states.csv
  planet/spk/testdata/de441_ref.csv
  planet/spk/testdata/ceres.bsp

Source
  JPL DE440/DE441 planetary ephemerides via NAIF,
    https://naif.jpl.nasa.gov/pub/naif/generic_kernels/spk/planets/
  and JPL Horizons, https://ssd.jpl.nasa.gov/horizons/
  The DE440/DE441 data are also the fitting target of the tables in section 2.

Terms
  Produced by the United States Government (NASA/JPL); not subject to
  copyright protection in the United States. NAIF and PDS ask that the source
  be credited, as done here.

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4. Natural Earth land polygons — internal/svgmap/land_*.path
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Source
  Natural Earth 1:50m physical land, without administrative boundaries,
    https://www.naturalearthdata.com/

Terms
  Public domain. Natural Earth states that the data may be used for any
  purpose without permission. Credit is given here as good practice, and the
  rendered charts carry the "Natural Earth 1:50m physical land" label.

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5. Star catalogue data — basic/star_catalog.dat
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Astrometry
  The built-in catalogue carries Bright Star Catalogue / Harvard (HR) numbers
  1..9110 with J2000 positions, proper motions and magnitudes. Its astrometric
  content derives from the Yale Bright Star Catalogue (Hoffleit & Warren),
  distributed by CDS as V/50,
    https://cdsarc.cds.unistra.fr/viz-bin/cat/V/50
  Catalogue data from CDS is distributed free of charge subject to the CDS
  general terms of use and to citation of the source.

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References
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  ISAS Data Policy ...... https://www.isas.jaxa.jp/en/researchers/data-policy/
  CC BY 4.0 ............. https://creativecommons.org/licenses/by/4.0/
  SELENE Data Archive ... https://darts.isas.jaxa.jp/
  IMCCE legal notice .... https://www.imcce.fr/mentions-legales
  Natural Earth ......... https://www.naturalearthdata.com/
  NAIF SPK kernels ...... https://naif.jpl.nasa.gov/pub/naif/generic_kernels/
  JPL Horizons .......... https://ssd.jpl.nasa.gov/horizons/
  CDS VizieR V/50 ....... https://cdsarc.cds.unistra.fr/viz-bin/cat/V/50
  SYRTE (Observatoire de Paris) ... https://syrte.obspm.fr/
  ELP/MPP02 distribution .......... ftp://cyrano-se.obspm.fr/pub/2_lunar_solutions/2_elpmpp02/