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Latest Satellite Tracking Priorities

SLR satellites are listed in order of highest priority to enable best coverage by the ILRS network.


The table below shows the number of normal points submitted to the EDC data centre by the ILRS network over the last 10 days. A priority is assigned to each satellite depending on its requirements for tracking. A priority setting of 1 is twice the priority of a setting of 2 which is twice as high in priority as a setting of 3.

A weighting is applied according to the number of Normal Points collected in the previous 10 days with the most recent data having a higher weighting, reducing its priority. This weighting is scaled by the satellite normal point bin length.

The satellites are tabled in decreasing order of their immediate priority for tracking. This table is updated every hour.

Click here to see a Herstmonceux only dynamic priority table
Updated:  Fri 28 Feb 10:53:54 UTC 2025

   Satellite     Days: 28   27   26   25   24   23   22   21   20   19   -30    TotalNP  p   Score

1306703  Swarmc        0    0    15   67   92   66   80   48   41   46   1362      455    2   42622
1306702  Swarma        7    23   68   73   119  55   84   71   15   39   1642      554    2   60422
1804702  Gracefo2      43   94   166  160  103  144  117  168  110  163  1587      1268   2   129927
1804701  Gracefo1      74   166  101  135  113  164  78   214  171  175  2306      1391   2   141426
1306701  Swarmb        46   66   144  197  146  164  158  231  187  234  3446      1573   2   147726
0702601  Terrasarx     49   45   58   142  49   95   156  105  151  77   1718      927    3   179318
1003001  Tandemx       34   58   87   103  63   104  144  215  210  122  1923      1140   3   199523
1807001  Icesat2       0    69   35   104  69   107  120  175  196  102  1289      977    2   245909
1601101  Sentinel3a    54   98   57   110  149  96   144  124  159  157  2109      1148   2   328809
9804305  Westpac       18   28   8    27   26   7    13   69   87   69   621       352    4   331341
1803901  Sentinel3b    29   87   119  91   85   124  185  173  138  209  2207      1240   2   334367
1802001  Paz           77   167  184  131  122  109  300  252  169  394  3359      1905   3   348439
1001301  Cryosat2      23   156  133  144  106  79   183  311  231  208  3018      1574   2   427338
1300901  Saral         44   138  111  213  162  69   203  162  151  210  2867      1463   2   434147
2217301  Swot          44   156  165  189  227  142  245  383  236  330  4021      2117   2   573421
8900103  Etalon1       0    18   8    21   16   11   9    42   23   28   290       176    2   912290
2008601  Sentinel6a    93   208  253  274  278  343  587  595  448  729  7096      3808   2   960196
1600201  Jason3        47   248  365  492  506  422  495  501  390  506  5494      3972   2   1144354
9207002  Lageos2       34   119  82   88   102  76   144  107  126  203  2838      1081   1   1209318
8903903  Etalon2       4    37   16   26   20   9    4    21   29   26   286       192    2   1213486
0304206  Larets        22   47   44   42   61   49   81   143  92   96   1290      677    4   1409130
1808101  Hy2b          46   154  124  68   95   71   178  191  136  133  2179      1196   3   1425139
1200601  Lares         75   210  201  197  247  218  381  375  363  295  4859      2562   2   1429139
7603901  Lageos1       48   146  137  105  146  73   175  176  145  196  3022      1347   1   1582222
6503201  Beaconc       32   117  111  120  164  50   220  456  275  371  6476      1916   4   1807436
2006601  Hy2c          22   172  202  177  181  154  149  349  278  280  3609      1964   3   2153529
1802902  Beidou3m10    0    2    4    1    4    7    18   12   2    8    169       58     5   2265769
2104301  Hy2d          44   127  197  242  217  194  241  361  170  149  3462      1942   3   2322102
1602101  Compassi6b    0    6    8    5    2    4    8    8    3    5    81        49     5   2419281
9306102  Stella        24   127  145  146  176  83   137  187  177  177  2560      1379   4   3207040
1603002  Galileo210    6    6    8    4    5    7    13   0    10   9    143       68     5   3379343
1801802  Beidou3m3     4    4    10   9    7    0    3    20   7    10   121       74     5   3427321
1802901  Beidou3m9     0    5    10   7    1    6    24   15   6    7    150       81     5   3552150
1507901  Galileo209    0    10   6    10   7    4    7    19   11   12   185       86     5   3734585
1706902  Beidou3m2     0    5    9    9    13   4    18   11   4    5    217       78     5   3801817
2208001  Lares2        65   174  191  133  175  87   170  245  161  269  2876      1670   2   3922556
7501001  Starlette     73   233  191  166  195  95   194  254  351  304  4447      2056   4   4663327
1106002  Galileo102    0    7    14   13   5    4    29   14   13   39   290       138    5   5174690
8606101  Ajisai        107  324  275  231  237  158  170  314  367  315  6072      2498   4   6095352
1405002  Galileo202    0    23   13   4    5    15   28   22   23   19   351       152    5   6595551