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Update docs for USNO field star catalogs (#33)

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dave-kaye 2021-11-03 15:06:51 -05:00 committed by Brandon Rhodes
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commit 85821c82bb
2 changed files with 28 additions and 34 deletions
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31
GUI/xephem/help/xephem.html
View File

@ -8102,39 +8102,36 @@ ideal companion and is automatically chosen as a convenience.
<span style="font-weight: bold;">Root directory</span><br>
<div style="margin-left: 40px;"> <br>
This choice of field stars supports the SA and the A series of
astrometric catalogs produced in recent years by the US Naval
Observatory. The SA2.0 for example, includes some 54 million stars,
astrometric catalogs produced by the US Naval Observatory. The SA2.0
for example, includes some 54 million stars, about a tenth of the parent A2.0,
spatially sampled so there is about 1,300 stars per square degree of
sky. Note that such a uniform distribution does not "look" much like
the real sky, but it is great for its intended use as an astrometric
mesh for comet hunters or such. To order these catalogs, see <a
href="http://psyche.usno.navy.mil/pmm" target="new">http://psyche.usno.navy.mil/pmm</a>.
If you have such a catalog, simply enter the name of its base directory
and toggle this switch on. The default assumes a symbolic link,
"catalogs/usno" off the shared directory. The suggested citation for
SA1.0 follows:<br>
mesh for comet hunters or such. If you have such a catalog, simply
enter the name of its base directory and toggle this switch on.
The default assumes a symbolic link, "catalogs/usno" off the shared
directory. Multiple versions of the catalogs can be stored, each in
its own directory, but only one may be active at a time.<br>
<br>
The suggested citation for SA2.0 follows:<br>
<br>
<div style="margin-left: 40px;"> Monet, D., Bird, A., Canzian, B.,
Harris, H., Reid, N., Rhodes, A., Sell, S., Ables, H., Dahn, C.,
Guetter, H., Henden, A., Leggett, S., Levison, H., Luginbuhl, C.,
Martini, J., Monet, A., Pier, J., Riepe, B., Stone, R., Vrba, F.,
Walker, R. 1996, USNO-SA1.0, (U.S. Naval Observatory, Washington
DC). </div>
Dahn, C., Guetter, H., Harris, H., Henden, A., Levine, S., Luginbuhl, C.,
Monet, A., Rhodes, A., Riepe, B., Sell, S., Stone, R., Vrba, F., Walker, R.,
1998, USNO-SA2.0, (U.S. Naval Observatory, Washington DC). </div>
<br>
This catalog has been included with permission of USNO as long as
we mention the following stipulations:<br>
<br>
<div style="margin-left: 40px;"> It may not be the latest version,
check
with http://ad.usno.navy.mil. </div>
check with http://www.usno.navy.mil. </div>
<br>
<div style="margin-left: 40px;"> If you paid for XEphem, you paid for
the software, not this catalog. The catalog is available free from
the USNO. </div>
<br>
<div style="margin-left: 40px;"> Inclusion of the SA2.0 catalog does
not
imply an endorsement of XEphem by USNO; nor did I have privileged
not imply an endorsement of XEphem by USNO; nor was there privileged
access to the catalog; nor does the US Government affirm or
guarantee that XEphem works properly in any way. </div>
</div>

31
Site/help/xephem.html
View File

@ -8102,39 +8102,36 @@ ideal companion and is automatically chosen as a convenience.
<span style="font-weight: bold;">Root directory</span><br>
<div style="margin-left: 40px;"> <br>
This choice of field stars supports the SA and the A series of
astrometric catalogs produced in recent years by the US Naval
Observatory. The SA2.0 for example, includes some 54 million stars,
astrometric catalogs produced by the US Naval Observatory. The SA2.0
for example, includes some 54 million stars, about a tenth of the parent A2.0,
spatially sampled so there is about 1,300 stars per square degree of
sky. Note that such a uniform distribution does not "look" much like
the real sky, but it is great for its intended use as an astrometric
mesh for comet hunters or such. To order these catalogs, see <a
href="http://psyche.usno.navy.mil/pmm" target="new">http://psyche.usno.navy.mil/pmm</a>.
If you have such a catalog, simply enter the name of its base directory
and toggle this switch on. The default assumes a symbolic link,
"catalogs/usno" off the shared directory. The suggested citation for
SA1.0 follows:<br>
mesh for comet hunters or such. If you have such a catalog, simply
enter the name of its base directory and toggle this switch on.
The default assumes a symbolic link, "catalogs/usno" off the shared
directory. Multiple versions of the catalogs can be stored, each in
its own directory, but only one may be active at a time.<br>
<br>
The suggested citation for SA2.0 follows:<br>
<br>
<div style="margin-left: 40px;"> Monet, D., Bird, A., Canzian, B.,
Harris, H., Reid, N., Rhodes, A., Sell, S., Ables, H., Dahn, C.,
Guetter, H., Henden, A., Leggett, S., Levison, H., Luginbuhl, C.,
Martini, J., Monet, A., Pier, J., Riepe, B., Stone, R., Vrba, F.,
Walker, R. 1996, USNO-SA1.0, (U.S. Naval Observatory, Washington
DC). </div>
Dahn, C., Guetter, H., Harris, H., Henden, A., Levine, S., Luginbuhl, C.,
Monet, A., Rhodes, A., Riepe, B., Sell, S., Stone, R., Vrba, F., Walker, R.,
1998, USNO-SA2.0, (U.S. Naval Observatory, Washington DC). </div>
<br>
This catalog has been included with permission of USNO as long as
we mention the following stipulations:<br>
<br>
<div style="margin-left: 40px;"> It may not be the latest version,
check
with http://ad.usno.navy.mil. </div>
check with http://www.usno.navy.mil. </div>
<br>
<div style="margin-left: 40px;"> If you paid for XEphem, you paid for
the software, not this catalog. The catalog is available free from
the USNO. </div>
<br>
<div style="margin-left: 40px;"> Inclusion of the SA2.0 catalog does
not
imply an endorsement of XEphem by USNO; nor did I have privileged
not imply an endorsement of XEphem by USNO; nor was there privileged
access to the catalog; nor does the US Government affirm or
guarantee that XEphem works properly in any way. </div>
</div>