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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:  Tue 17 Jun 04:53:24 UTC 2025

   Satellite     Days: 17   16   15   14   13   12   11   10   9    8    -30    TotalNP  p   Score

1306702  Swarma        0    13   0    23   22   61   31   0    31   37   977       218    2   19737
1306703  Swarmc        0    18   36   46   9    54   29   63   37   19   1090      311    2   30970
1807001  Icesat2       0    45   11   52   54   66   113  172  23   0    1237      536    2   51737
1804701  Gracefo1      0    59   48   80   151  154  56   76   99   78   1895      801    2   79475
1804702  Gracefo2      0    107  65   54   166  96   108  33   108  51   1398      788    2   84098
1306701  Swarmb        0    128  11   53   113  267  170  43   168  74   2397      1027   2   99257
1600201  Jason3        65   60   0    13   30   31   0    0    0    0    3320      199    2   100280
0702601  Terrasarx     0    47   36   93   76   83   77   54   52   76   1010      594    3   116330
1003001  Tandemx       0    83   28   80   122  88   77   89   60   48   1146      675    3   138986
1802001  Paz           0    96   28   50   123  121  131  128  156  57   1901      890    3   164221
1300901  Saral         0    48   86   113  79   55   49   101  78   78   1594      687    2   205174
1601101  Sentinel3a    0    68   49   18   120  171  82   104  92   69   1715      773    2   217595
1803901  Sentinel3b    0    38   89   43   113  182  55   93   60   86   1640      759    2   220520
9804305  Westpac       0    12   24   18   19   38   27   22   22   16   404       198    4   231764
1001301  Cryosat2      0    91   80   101  153  99   183  183  101  98   2716      1089   2   312316
1602101  Compassi6b    0    0    2    0    2    0    2    0    0    0    44        6      5   345644
2217301  Swot          11   75   125  138  205  195  168  148  160  141  3431      1366   2   395411
1808101  Hy2b          0    85   33   66   94   86   68   58   69   35   1512      594    3   746472
8900103  Etalon1       0    10   12   17   26   26   12   14   26   26   297       169    2   911097
2008601  Sentinel6a    76   207  339  381  480  439  333  294  424  123  4767      3096   2   980487
0304206  Larets        0    32   22   16   87   80   78   42   43   41   968       441    4   991208
2006601  Hy2c          0    70   88   85   161  147  27   40   105  74   2483      797    3   996563
1200601  Lares         21   120  164  181  200  287  213  208  218  108  3154      1720   2   1026034
8903903  Etalon2       0    12   24   22   38   33   37   14   20   10   298       210    2   1304698
7603901  Lageos1       0    115  101  77   223  197  182  146  117  126  2775      1284   1   1498215
2104301  Hy2d          20   124  86   153  224  216  126  133  124  108  2804      1314   3   1624724
1802902  Beidou3m10    0    3    3    5    0    4    9    3    8    4    67        39     5   1641667
9207002  Lageos2       11   143  111  119  224  185  215  102  159  108  2694      1377   1   1677654
9306102  Stella        0    64   59   73   124  111  97   135  133  72   1977      868    4   1916697
1802901  Beidou3m9     0    3    4    6    12   1    0    3    6    5    93        40     5   1958493
1801802  Beidou3m3     0    5    4    6    9    5    3    7    4    1    144       44     5   2304144
6503201  Beaconc       0    104  247  257  195  383  361  222  374  142  2983      2285   4   2594023
1706902  Beidou3m2     0    3    6    0    3    16   13   3    16   8    153       68     5   2630553
1603002  Galileo210    0    3    0    8    24   4    4    5    5    0    100       53     5   2764900
2208001  Lares2        0    100  103  100  191  158  212  100  105  99   2714      1168   2   2794874
7501001  Starlette     5    145  157  225  226  280  396  210  272  190  4415      2106   4   4751615
1507901  Galileo209    0    11   26   9    7    23   8    11   13   8    235       116    5   6009835
1405002  Galileo202    0    10   13   28   5    13   24   17   11   2    139       123    5   6297739
8606101  Ajisai        39   249  275  353  233  462  525  232  295  140  4856      2803   4   6982136
1106002  Galileo102    0    19   17   6    37   29   17   9    16   3    216       153    5   8121816