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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:  Sat 13 Sep 02:58:00 UTC 2025

   Satellite     Days: 13   12   11   10   9    8    7    6    5    4    -30    TotalNP  p   Score

1306702  Swarma        0    20   2    0    41   59   0    13   29   58   1064      222    2   18904
1306703  Swarmc        0    16   6    17   32   59   26   10   14   82   1070      262    2   21910
1602101  Compassi6b    0    0    0    0    0    0    0    1    0    1    12        2      5   38412
1807001  Icesat2       0    29   37   34   104  63   0    0    53   54   1521      374    2   39401
1804702  Gracefo2      0    58   19   25   115  101  48   26   66   97   1728      555    2   52588
1804701  Gracefo1      0    56   51   51   84   59   95   28   58   53   1990      535    2   56010
1306701  Swarmb        0    93   16   29   226  99   16   59   63   157  3411      758    2   74271
0702601  Terrasarx     0    37   60   0    82   84   30   48   63   85   1539      489    3   89539
1003001  Tandemx       0    30   69   17   143  136  5    82   60   77   1761      619    3   119441
1802001  Paz           0    166  61   20   158  148  0    97   45   178  2735      873    3   177495
1803901  Sentinel3b    0    48   15   51   118  172  51   100  115  228  2269      898    2   208609
1601101  Sentinel3a    0    56   56   42   88   129  76   112  93   260  2255      912    2   212555
9804305  Westpac       0    7    19   4    10   63   44   4    24   42   715       217    4   215755
1300901  Saral         0    86   142  7    113  216  59   88   58   149  2523      918    2   271443
2217301  Swot          0    109  52   45   134  208  129  57   54   135  3517      923    2   272677
1001301  Cryosat2      0    90   56   55   152  211  137  87   64   149  3341      1001   2   285101
1200601  Lares         0    78   61   17   173  174  47   173  117  172  3471      1012   2   523071
1600201  Jason3        0    163  141  45   460  558  308  203  109  418  6539      2405   2   662759
2008601  Sentinel6a    0    180  71   19   449  596  284  327  196  458  7487      2580   2   665207
8903903  Etalon2       0    9    15   12   13   10   6    41   16   38   449       160    2   756449
0304206  Larets        0    31   27   18   40   63   48   26   42   66   1567      361    4   767647
1808101  Hy2b          0    98   60   8    86   148  53   62   64   64   1118      643    3   784478
8900103  Etalon1       0    25   5    3    15   28   12   14   23   34   351       159    2   823551
2006601  Hy2c          0    44   93   8    33   118  134  160  107  212  4564      909    3   826804
9207002  Lageos2       0    111  69   41   106  223  31   100  125  168  3084      974    1   1066524
1802902  Beidou3m10    0    0    0    0    6    6    2    11   0    6    208       31     5   1085008
2104301  Hy2d          0    98   157  95   152  209  150  191  125  177  3487      1354   3   1529887
7603901  Lageos1       0    113  133  75   155  227  162  246  165  258  4600      1534   1   1599400
1802901  Beidou3m9     0    5    0    0    4    10   7    5    0    8    163       39     5   1632163
6503201  Beaconc       0    147  210  57   170  178  139  274  278  515  8423      1968   4   1871063
9306102  Stella        0    64   77   65   104  169  119  115  101  158  2915      972    4   2065475
1106002  Galileo102    0    0    0    2    0    20   8    2    22   23   311       77     5   2102711
1706902  Beidou3m2     0    7    2    0    13   11   0    3    7    11   196       54     5   2361796
1801802  Beidou3m3     0    16   5    0    2    3    2    5    7    3    144       43     5   2409744
2208001  Lares2        0    112  70   34   181  191  94   148  170  171  2946      1171   2   2488386
1603002  Galileo210    0    11   0    5    7    8    3    21   15   13   306       83     5   3206706
7501001  Starlette     0    101  211  51   151  281  92   218  251  271  5995      1627   4   3394795
1507901  Galileo209    0    8    12   5    11   21   8    3    8    18   240       94     5   4310640
1405002  Galileo202    0    16   7    0    9    19   19   12   30   19   415       131    5   5184415
8606101  Ajisai        0    186  221  130  289  498  205  382  249  335  6837      2495   4   5466837