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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:  Thu 10 Jul 04:53:50 UTC 2025

   Satellite     Days: 10   9    8    7    6    5    4    3    2    1    -30    TotalNP  p   Score

1306702  Swarma        0    16   17   0    0    5    32   27   24   23   532       144    2   12232
1306703  Swarmc        0    12   18   14   0    0    29   13   50   22   619       158    2   13159
1807001  Icesat2       0    122  142  23   0    46   47   24   24   59   1075      487    2   60915
1804702  Gracefo2      15   55   50   95   37   89   59   104  83   121  2234      708    2   66474
1804701  Gracefo1      16   154  89   86   37   72   90   88   106  175  2335      913    2   91395
1306701  Swarmb        0    157  152  61   42   100  129  216  98   132  2855      1087   2   108855
1003001  Tandemx       0    101  24   27   18   78   108  50   161  28   1489      595    3   110289
0702601  Terrasarx     0    91   132  40   23   49   92   57   79   62   1239      625    3   133119
1601101  Sentinel3a    7    62   57   75   4    42   55   145  85   86   1904      618    2   167144
1602101  Compassi6b    0    0    0    0    2    0    2    0    0    0    20        4      5   192020
1802001  Paz           0    128  146  130  16   59   88   145  163  76   2543      951    3   194943
1803901  Sentinel3b    0    70   102  66   32   36   66   186  56   123  2069      737    2   202289
1001301  Cryosat2      18   86   78   27   28   84   103  153  154  128  2477      859    2   222197
1300901  Saral         0    126  119  49   14   56   100  128  119  114  1950      825    2   237690
9804305  Westpac       0    30   26   11   5    38   24   11   39   27   459       211    4   242619
2217301  Swot          0    108  107  56   97   120  130  115  164  136  3545      1033   2   287405
1600201  Jason3        0    261  289  142  110  196  378  418  342  503  4704      2639   2   679584
8903903  Etalon2       0    12   16   6    0    11   30   18   29   46   464       168    2   733664
1200601  Lares         0    116  137  99   65   201  216  196  216  124  4176      1370   2   752496
2008601  Sentinel6a    0    271  283  181  180  254  396  529  403  283  8923      2780   2   763723
2006601  Hy2c          0    75   92   34   25   44   82   142  107  194  2290      795    3   765730
1808101  Hy2b          0    88   110  43   28   54   85   82   102  100  1738      692    3   793978
8900103  Etalon1       0    20   13   11   0    15   27   17   18   32   353       153    2   795953
0304206  Larets        0    53   64   21   20   60   43   61   73   55   1097      450    4   1014857
2104301  Hy2d          8    56   110  109  60   91   178  141  128  234  3430      1115   3   1123510
9207002  Lageos2       0    82   120  84   32   148  274  181  226  191  3626      1338   1   1323626
9306102  Stella        15   74   92   56   48   64   60   96   85   200  2266      790    4   1658266
6503201  Beaconc       0    114  134  178  74   105  299  323  190  340  5923      1757   4   1733443
1802901  Beidou3m9     1    0    3    0    4    10   11   7    2    6    116       44     5   1756916
7603901  Lageos1       0    168  183  118  80   172  237  222  199  337  4183      1716   1   1802023
2208001  Lares2        0    58   151  86   45   115  211  175  144  214  3442      1199   2   2426482
1507901  Galileo209    0    3    0    6    8    4    7    21   20   4    270       73     5   2611470
1802902  Beidou3m10    0    0    6    17   6    7    0    8    3    13   70        60     5   2697670
7501001  Starlette     10   147  108  106  43   103  179  224  172  238  4403      1330   4   2774963
1706902  Beidou3m2     0    2    9    8    3    7    8    18   2    11   116       68     5   2880116
1801802  Beidou3m3     0    6    15   0    0    7    8    11   9    15   156       71     5   2947356
1603002  Galileo210    0    7    0    7    16   5    13   18   6    2    167       74     5   3388967
1106002  Galileo102    0    14   11   0    2    28   6    10   31   10   397       112    5   4723597
1405002  Galileo202    0    5    21   11   11   16   7    10   7    9    316       97     5   4963516
8606101  Ajisai        0    284  307  260  93   268  416  305  417  353  7397      2703   4   6005477