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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:  Mon 20 Jan 21:54:05 UTC 2025

   Satellite     Days: 20   19   18   17   16   15   14   13   12   11   -30    TotalNP  p   Score

1600201  Jason3        0    8    3    0    19   0    0    0    0    0    4791      30     2   17391
1306703  Swarmc        0    16   38   90   104  66   138  38   58   65   752       613    2   58332
1804702  Gracefo2      5    63   94   111  115  105  100  11   75   89   1277      768    2   81937
1306702  Swarma        0    30   69   119  232  43   179  75   67   92   779       906    2   89359
1804701  Gracefo1      5    112  103  123  67   121  182  0    156  74   1461      943    2   98741
1306701  Swarmb        124  56   84   72   158  143  298  123  94   0    2408      1152   2   129048
0702601  Terrasarx     24   26   84   94   98   119  147  86   48   68   1512      794    3   161392
1807001  Icesat2       17   18   48   31   217  125  105  11   13   0    681       585    2   201021
1003001  Tandemx       42   107  177  109  135  118  108  89   64   60   1581      1009   3   235541
1601101  Sentinel3a    33   24   118  34   134  99   150  143  138  77   1925      950    2   266465
1803901  Sentinel3b    0    89   114  57   158  120  173  74   105  80   1855      970    2   293695
9804305  Westpac       33   30   22   49   42   25   19   30   36   19   541       305    4   421261
1802001  Paz           31   113  306  210  347  218  171  329  235  111  2887      2071   3   429647
1001301  Cryosat2      120  113  130  137  200  154  201  148  97   52   2365      1352   2   463165
1300901  Saral         137  199  228  104  200  107  95   217  186  126  2447      1599   2   541067
2217301  Swot          193  191  202  184  360  158  133  247  265  166  3684      2099   2   692004
2008601  Sentinel6a    343  385  336  218  339  231  394  246  170  96   5106      2758   2   1027986
8900103  Etalon1       7    18   24   16   22   14   8    17   29   15   285       170    2   1073085
1200601  Lares         166  198  241  190  193  185  206  184  137  123  2423      1823   2   1269143
8903903  Etalon2       16   27   39   19   13   5    3    18   30   6    303       176    2   1299903
1808101  Hy2b          106  66   170  173  132  129  108  182  108  95   1729      1269   3   1669969
2104301  Hy2d          134  181  168  107  143  88   81   84   30   36   2033      1052   3   1689713
7603901  Lageos1       72   157  152  172  163  132  121  175  88   71   2240      1303   1   1789520
9207002  Lageos2       69   133  110  228  204  197  168  162  153  69   2453      1493   1   1947653
0304206  Larets        61   48   89   65   90   90   84   96   103  29   1074      755    4   1948914
1706902  Beidou3m2     0    3    3    9    8    3    0    5    10   5    100       46     5   2083300
2006601  Hy2c          162  262  236  144  219  127  113  144  215  107  2037      1729   3   2460597
1602101  Compassi6b    0    8    6    8    7    6    0    0    11   7    105       53     5   2659305
6503201  Beaconc       108  212  351  209  325  198  114  137  250  213  2475      2117   4   2829435
1802902  Beidou3m10    0    7    4    15   10   3    0    0    10   0    110       49     5   2832110
1507901  Galileo209    4    6    9    0    2    16   6    3    9    12   142       67     5   3081742
2208001  Lares2        49   189  101  174  149  123  208  80   72   86   1827      1231   2   3375267
9306102  Stella        76   146  149  124  150  150  118  139  125  135  2123      1312   4   3389963
1802901  Beidou3m9     0    0    17   15   24   7    0    0    5    10   127       78     5   4224127
1405002  Galileo202    0    3    12   25   12   5    3    24   26   10   268       120    5   5193868
1603002  Galileo210    2    14   10   11   22   16   6    5    10   14   192       110    5   5644992
1801802  Beidou3m3     11   16   8    9    12   13   20   0    9    11   123       109    5   6019323
1106002  Galileo102    0    21   10   2    34   17   3    20   24   15   307       146    5   6787507
7501001  Starlette     217  276  288  207  357  320  192  349  382  252  3896      2840   4   7194296
8606101  Ajisai        245  352  520  510  557  483  368  494  669  335  7428      4533   4   11398788