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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:  Wed Aug 23 03:52:29 UTC 2017

   Satellite     Days: 23   22   21   20   19   18   17   16   15   14       TotalNP  p   Score

1504905  Pn1a          0    0    0    0    0    0    0    0    0    0         0      4   0    
1704205  Technosat     0    0    0    0    0    0    0    0    0    0         0      3   0    
1300301  Stsat2c       0    0    0    0    0    0    2    0    0    0         2      3   960  
0201202  Graceb        0    33   0    0    0    10   0    36   33   47        159    2   11360
1306702  Swarma        0    105  77   21   15   30   183  138  65   166       800    2   67800
0201201  Gracea        0    117  121  100  15   177  38   21   53   70        712    2   81740
1306703  Swarmc        0    192  55   24   54   71   172  97   40   169       874    2   84860
1306701  Swarmb        0    219  226  315  193  156  315  153  291  249       2117   2   209440
0702601  Terrasarx     2    120  120  121  69   111  250  116  136  89        1134   3   223400
1003001  Tandemx       5    150  215  134  23   102  211  121  82   72        1115   3   245960
1503701  Compassms2    0    0    0    0    0    0    0    10   0    4         14     5   326400
1300901  Saral         7    174  153  100  138  210  170  141  119  139       1351   2   415080
1001301  Cryosat2      8    173  131  176  142  189  212  172  149  94        1446   2   448200
0200901  Envisat       0    7    50   75   12   73   57   44   86   50        454    4   481680
1601101  Sentinel3a    0    227  247  176  121  347  348  203  233  227       2129   2   624360
1503702  Compassms1    0    4    0    3    0    3    0    3    0    4         17     5   816000
8903903  Etalon2       0    13   11   13   15   26   28   26   18   6         156    2   897600
1304201  Kompsat5      4    418  224  167  205  373  417  143  46   41        2038   4   967040
0803201  Jason2        0    340  454  140  281  548  537  332  325  385       3342   2   976620
1200601  Lares         0    231  161  182  105  305  278  191  128  178       1759   2   1069800
1600201  Jason3        0    619  488  432  286  705  629  533  317  518       4527   2   1380420
1104301  Hy2a          9    161  109  118  71   154  174  105  129  76        1106   3   1386720
8900103  Etalon1       0    24   19   21   26   55   31   36   23   43        278    2   1520400
1201801  Compassm3     0    0    2    0    10   4    17   3    5    3         44     5   1785600
0304206  Larets        0    105  63   58   57   92   120  144  64   139       842    4   1841280
9207002  Lageos2       18   206  244  159  123  256  265  248  250  280       2049   1   2328240
7603901  Lageos1       0    205  197  238  116  284  332  227  227  227       2053   1   2374320
9306102  Stella        0    92   121  83   99   134  185  128  91   167       1100   4   2454720
6503201  Beaconc       45   345  235  91   134  258  254  243  139  301       2045   4   2517600
1405001  Galileo201    0    10   0    9    5    0    4    16   7    22        73     5   2716800
1405002  Galileo202    0    3    0    2    10   16   21   6    7    8         73     5   2928000
7501001  Starlette     40   220  344  312  192  467  329  457  440  433       3234   4   7105440
8606101  Ajisai        0    371  440  312  291  526  415  363  277  220       3215   4   8132160