Skychart

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1. Download all torrent
2. extract every .rar (for example on Linux: ls -1 *.rar| xargs -n1 unrar e )
3. copy every .txt file to a single directory
4. rename the file 0896: mv 0896_nomad.tx 0896_nomad.txt
5. this result in 1800 .txt files for a total size of 152G.
6. ulimit -S -n 20000
7. skychart
8. Setup / Catalog / Catgen
9. Load Project → nomad.prj
10. Input catalog files → select the 1800 .txt files (be patient until it update the list)
11. Next button
12. Next button
13. Next button
14. Output directory → select where to put the catalog
15. Build catalog button
16. Wait a few hours …