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en:news:ucac3_catalog [2009/10/03 12:29]
admin
en:news:ucac3_catalog [2015/11/06 20:43] (current)
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 ~~NOTOC~~ ~~NOTOC~~
 +
 ====== A new catalog ideal for star chart ====== ====== A new catalog ideal for star chart ======
  
 {{ en:​screenshot:​i036.jpg?​350|M 13 with UCAC3 catalog}} {{ en:​screenshot:​i036.jpg?​350|M 13 with UCAC3 catalog}}
-The **UCAC3** star catalog was published by USNO at the end of august.\\+The **UCAC3** star catalog was published by USNO at the end of august ​2009.\\
 Its main characteristics are:  Its main characteristics are: 
   * Full sky coverage   * Full sky coverage
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 To solve the problem with the missing bright stars it not include any star present in Tycho2 catalog or any star brighter than magnitude 10. This implies you must always activate the Tycho2 at the same time with this catalog. To solve the problem with the missing bright stars it not include any star present in Tycho2 catalog or any star brighter than magnitude 10. This implies you must always activate the Tycho2 at the same time with this catalog.
  
-To use this catalog start by getting the part you need from the [[en:​download ​catalogs]] page.\\+To use this catalog start by getting the part you need from the [[en:​download]] page.\\
 It is split in three part so you can get only the zone visible from your area. It is split in three part so you can get only the zone visible from your area.
   * ucac3-catalog-south.zip ​  : South zone -90 to -30   * ucac3-catalog-south.zip ​  : South zone -90 to -30
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 | Tycho 2 | 0 - 6 | 0 - 45 | | Tycho 2 | 0 - 6 | 0 - 45 |
 | 3UC | 0 - 3 | 0 - 5 | | 3UC | 0 - 3 | 0 - 5 |
 +
  
 ===== Build your own catalog ===== ===== Build your own catalog =====
  
-If you have a copy of the UCAC3 DVD you can use Catgen to build your own catalog from the original data files. This allow you to include more or less information for each star depending on your needs.+If you have a copy of the UCAC3 DVD, or if you can download the files from the [[ftp://​cdsarc.u-strasbg.fr/​pub/​cats/​I/​315/​|CDS]], ​you can use Catgen to build your own catalog from the original data files. This allow you to include more or less information for each star depending on your needs.
  
 You must first convert the binary data on the DVD to ASCII text files using the include u3read program or my u3conv program.\\ ​ You must first convert the binary data on the DVD to ASCII text files using the include u3read program or my u3conv program.\\ ​
 The advantage of u3conv is it process all the files at a time and add the star identifier and the color index after the other data. There is also a switch to filter or not the Tycho2 and bright stars.\\ The advantage of u3conv is it process all the files at a time and add the star identifier and the color index after the other data. There is also a switch to filter or not the Tycho2 and bright stars.\\
-You can download u3conv for [[http://​www.ap-i.net/​pub/​skychart/​ucac3/​u3conv.zip|Windows and Linux]] or get the [[http://​skychart.svn.sourceforge.net/​viewvc/​skychart/​trunk/​tools/​cat/​ucac3/​src/​|source code]]. Run the program in a console to show the syntax help.+You can download u3conv for [[http://​www.ap-i.net/​pub/​skychart/​ucac3/​u3conv.zip|Windows and Linux]] or get the [[https://​skychart.svn.sourceforge.net/​svnroot/​skychart/​trunk/​tools/​cat/​ucac3/​src/​|source code]]. Run the program in a console to show the syntax help.
  
-Then use [[en:​documentation:​catgen|Catgen]] to convert the text files to a binary catalog optimized for chart display. You can start by loading the [[http://​skychart.svn.sourceforge.net/​viewvc/​skychart/​trunk/​tools/​cat/​ucac3/​|project file]] used for the standard catalog.\\+Then use [[en:​documentation:​catgen|Catgen]] to convert the text files to a binary catalog optimized for chart display. You can start by loading the [[https://​skychart.svn.sourceforge.net/​svnroot/​skychart/​trunk/​tools/​cat/​ucac3/​ucac3_catalog.prj|project file]] used for the standard catalog.\\
 Use a snapshot more recent than skychart-3.1-1232 as I correct a few bug with Catgen. Use a snapshot more recent than skychart-3.1-1232 as I correct a few bug with Catgen.
  
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