Free Access
Table 1
Input catalogs.
| Center | Software | Time Span month/year | N. delay | N. sources |
|
|
||||
| JPL | MODEST | 10/1978 01/2005 | 3 575 847 | 734(2) |
| USNO | Calc/Solve | 09/1979 01/2005 | 4 252 684 | 943(207) |
Notes. The last column shows the number of sources in the catalog and the number of reference sources used to tie the orientation of the catalog to the ICRF.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.