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[automated site update]
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github-actions committed Dec 17, 2024
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2 changes: 1 addition & 1 deletion apidoc/html/index.html
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Expand Up @@ -294,7 +294,7 @@ <h3><a class="anchor" id="autotoc_md48"></a>
<td class="markdownTableBodyNone">Fixed Earth System </td><td class="markdownTableBodyNone">WGS84 </td><td class="markdownTableBodyNone">International Terrestrial Reference System (ITRS) </td></tr>
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<p>See the various enums and constants defined in <code><a class="el" href="novas_8h.html">novas.h</a></code>, as well as the descriptions on the various NOVAS routines on how they are appropriate for the old and new methodologies respectively. Figure 1 also shows the relation of the various old and new coordinate systems and the (Super)NOVAS functions for converting among them.</p>
<p>In NOVAS, the barycentric BCRS and the geocentric GCRS systems are effectively synonymous to ICRS, since the origin for positions and for velocities, in any reference system, is determined by the <code>observer</code> location.</p>
<p>In NOVAS, the barycentric BCRS and the geocentric GCRS systems are effectively synonymous to ICRS, since the origin for positions and for velocities, in any reference system, is determined by the <code>observer</code> location, while aberration and gravitational deflection is included for apparent places only (as seen from the observer location).</p>
<p>TIRS (Intermediate Terrestrial Reference System) is not explicitly referenced in SuperNOVAS. But it can be thought of as a special case of ITRS (International Terrestrial Reference System) with DUT1 (= UT1-UTC), the polar offsets (<em>dx</em>, <em>dy</em>) all set to zero.</p>
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3 changes: 2 additions & 1 deletion doc/README.md
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Expand Up @@ -382,7 +382,8 @@ on how they are appropriate for the old and new methodologies respectively. Figu
various old and new coordinate systems and the (Super)NOVAS functions for converting among them.
In NOVAS, the barycentric BCRS and the geocentric GCRS systems are effectively synonymous to ICRS, since the origin
for positions and for velocities, in any reference system, is determined by the `observer` location.
for positions and for velocities, in any reference system, is determined by the `observer` location, while aberration
and gravitational deflection is included for apparent places only (as seen from the observer location).
TIRS (Intermediate Terrestrial Reference System) is not explicitly referenced in SuperNOVAS. But it can be thought
of as a special case of ITRS (International Terrestrial Reference System) with DUT1 (= UT1-UTC), the polar offsets
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