Update docs for USNO field star catalogs (#33)

GUI/xephem/help/xephem.html

@@ -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
+astrometric catalogs produced by the US Naval Observatory. The SA2.0
-Observatory. The SA2.0 for example, includes some 54 million stars,
+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
+mesh for comet hunters or such. If you have such a catalog, simply
- href="http://psyche.usno.navy.mil/pmm" target="new">http://psyche.usno.navy.mil/pmm</a>.
+enter the name of its base directory and toggle this switch on.
-If you have such a catalog, simply enter the name of its base directory
+The default assumes a symbolic link, "catalogs/usno" off the shared
-and toggle this switch on. The default assumes a symbolic link,
+directory. Multiple versions of the catalogs can be stored, each in
-"catalogs/usno" off the shared directory. The suggested citation for
+its own directory, but only one may be active at a time.<br>
-SA1.0 follows:<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.,
+Dahn, C., Guetter, H., Harris, H., Henden, A., Levine, S., Luginbuhl, C.,
-Guetter, H., Henden, A., Leggett, S., Levison, H., Luginbuhl, C.,
+Monet, A., Rhodes, A., Riepe, B., Sell, S., Stone, R., Vrba, F., Walker, R.,
-Martini, J., Monet, A., Pier, J., Riepe, B., Stone, R., Vrba, F.,
+1998, USNO-SA2.0, (U.S. Naval Observatory, Washington DC). </div>
-Walker, R. 1996, USNO-SA1.0, (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
+check with http://www.usno.navy.mil. </div>
-with http://ad.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
+not imply an endorsement of XEphem by USNO; nor was there privileged
-imply an endorsement of XEphem by USNO; nor did I have privileged
 access to the catalog; nor does the US Government affirm or
 guarantee that XEphem works properly in any way. </div>
 </div>

Site/help/xephem.html

@@ -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
+astrometric catalogs produced by the US Naval Observatory. The SA2.0
-Observatory. The SA2.0 for example, includes some 54 million stars,
+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
+mesh for comet hunters or such. If you have such a catalog, simply
- href="http://psyche.usno.navy.mil/pmm" target="new">http://psyche.usno.navy.mil/pmm</a>.
+enter the name of its base directory and toggle this switch on.
-If you have such a catalog, simply enter the name of its base directory
+The default assumes a symbolic link, "catalogs/usno" off the shared
-and toggle this switch on. The default assumes a symbolic link,
+directory. Multiple versions of the catalogs can be stored, each in
-"catalogs/usno" off the shared directory. The suggested citation for
+its own directory, but only one may be active at a time.<br>
-SA1.0 follows:<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.,
+Dahn, C., Guetter, H., Harris, H., Henden, A., Levine, S., Luginbuhl, C.,
-Guetter, H., Henden, A., Leggett, S., Levison, H., Luginbuhl, C.,
+Monet, A., Rhodes, A., Riepe, B., Sell, S., Stone, R., Vrba, F., Walker, R.,
-Martini, J., Monet, A., Pier, J., Riepe, B., Stone, R., Vrba, F.,
+1998, USNO-SA2.0, (U.S. Naval Observatory, Washington DC). </div>
-Walker, R. 1996, USNO-SA1.0, (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
+check with http://www.usno.navy.mil. </div>
-with http://ad.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
+not imply an endorsement of XEphem by USNO; nor was there privileged
-imply an endorsement of XEphem by USNO; nor did I have privileged
 access to the catalog; nor does the US Government affirm or
 guarantee that XEphem works properly in any way. </div>
 </div>