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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:  Sun Jun 25 23:52:35 UTC 2017

   Satellite     Days: 25   24   23   22   21   20   19   18   17   16       TotalNP  p   Score

1504905  Pn1a          0    0    0    0    0    0    0    0    0    0         0      4   0    
1300301  Stsat2c       0    0    0    7    0    0    0    0    0    0         7      3   5880 
0201201  Gracea        57   25   14   53   39   86   23   24   46   58        425    2   45120
1306703  Swarmc        15   58   25   56   65   110  77   142  98   89        735    2   64460
0201202  Graceb        79   51   51   61   56   51   82   35   59   64        589    2   65800
1306702  Swarma        14   55   39   78   56   135  69   100  76   67        689    2   65980
1003001  Tandemx       52   98   140  105  137  158  135  82   99   128       1134   3   239240
0702601  Terrasarx     42   79   110  165  139  159  146  41   199  135       1215   3   241400
1306701  Swarmb        199  234  137  216  395  555  568  524  335  312       3475   2   333500
0200901  Envisat       8    11   8    20   46   60   70   71   4    58        356    4   364320
0803201  Jason2        70   128  127  97   160  247  171  428  241  218       1887   2   504600
1300901  Saral         45   102  132  223  233  311  153  218  178  163       1758   2   523380
1001301  Cryosat2      38   167  127  241  186  227  230  272  159  234       1881   2   547500
1601101  Sentinel3a    146  138  109  177  183  362  383  333  217  205       2253   2   653460
1503701  Compassms2    0    4    0    5    0    0    0    0    0    3         12     5   710400
1304201  Kompsat5      42   93   105  343  286  292  307  353  85   75        1981   4   816480
8903903  Etalon2       17   14   4    19   23   24   32   15   29   25        202    2   1170000
1503702  Compassms1    4    7    0    0    0    0    6    0    0    5         22     5   1267200
8900103  Etalon1       26   23   6    5    19   29   32   41   37   23        241    2   1388400
1104301  Hy2a          40   78   110  130  151  185  167  61   104  83        1109   3   1407600
1200601  Lares         134  215  138  238  268  320  357  319  337  232       2558   2   1505280
1600201  Jason3        349  402  415  434  734  820  822  845  641  460       5922   2   1772100
1201801  Compassm3     0    2    1    0    4    10   7    13   13   6         56     5   1910400
0304206  Larets        73   74   40   118  83   145  143  56   124  95        951    4   2327040
6503201  Beaconc       29   104  143  241  342  375  281  109  156  182       1962   4   2382960
9207002  Lageos2       111  191  146  311  228  229  338  258  257  246       2315   1   2777520
7603901  Lageos1       100  200  157  246  327  293  309  234  239  183       2288   1   2832960
9306102  Stella        70   123  98   107  128  215  172  99   161  95        1268   4   3160800
1405001  Galileo201    0    7    8    8    4    5    25   19   7    17        100    5   4032000
1405002  Galileo202    13   16   0    1    11   19   20   12   8    5         105    5   5558400
7501001  Starlette     136  279  228  168  215  348  371  390  350  289       2774   4   6501120
8606101  Ajisai        275  390  425  546  565  491  515  477  550  437       4671   4   11690400