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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 Apr 23 16:52:09 UTC 2017

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

1300301  Stsat2c       0    0    0    0    0    0    0    0    0    0         0      3   0    
1503701  Compassms2    0    0    0    0    0    0    0    0    0    0         0      5   0    
1504905  Pn1a          0    0    0    0    0    0    0    0    0    0         0      4   0    
1306703  Swarmc        32   43   35   55   104  106  78   34   85   66        638    2   63520
1306702  Swarma        22   41   41   52   97   137  81   46   95   75        687    2   65500
0201201  Gracea        48   51   40   45   134  137  91   52   98   115       811    2   77880
0201202  Graceb        44   63   43   71   213  161  54   37   68   71        825    2   89300
1306701  Swarmb        70   187  248  181  395  300  311  163  146  189       2190   2   234360
0702601  Terrasarx     61   99   156  145  148  117  127  50   127  137       1167   3   251440
1003001  Tandemx       53   166  177  190  113  144  80   43   129  92        1187   3   278680
1300901  Saral         52   111  199  245  147  261  127  52   242  227       1663   2   503280
1601101  Sentinel3a    43   111  187  219  234  222  257  112  194  136       1715   2   531600
0200901  Envisat       22   13   55   56   59   108  2    4    62   29        410    4   536640
1503702  Compassms1    0    0    0    7    0    0    0    3    3    0         13     5   614400
1001301  Cryosat2      103  139  248  285  296  305  180  105  219  166       2046   2   672000
1304201  Kompsat5      32   154  181  210  259  433  137  19   0    0         1425   4   715840
1200601  Lares         107  149  222  251  229  184  73   124  56   232       1627   2   1109520
8903903  Etalon2       3    23   32   27   17   10   16   9    26   5         168    2   1178400
1104301  Hy2a          23   124  100  181  114  148  91   28   60   113       982    3   1324320
1600201  Jason3        281  421  428  631  551  431  289  189  157  255       3633   2   1331580
0803201  Jason2        207  324  552  674  552  564  133  237  372  490       4105   2   1363740
8900103  Etalon1       25   29   12   20   45   35   0    9    16   30        221    2   1537200
0304206  Larets        39   64   65   110  129  67   79   41   39   131       764    4   1926240
9207002  Lageos2       88   141  149  232  247  236  136  138  148  234       1749   1   2187600
6503201  Beaconc       63   112  316  180  307  290  60   16   57   380       1781   4   2280000
7603901  Lageos1       113  196  209  257  202  292  141  130  161  285       1986   1   2543520
9306102  Stella        57   99   136  217  111  146  93   58   110  188       1215   4   3080640
1201801  Compassm3     0    14   14   7    13   11   1    0    9    12        81     5   4358400
1405001  Galileo201    0    14   7    5    8    18   17   3    16   28        116    5   4723200
1405002  Galileo202    6    18   8    22   6    10   5    9    9    6         99     5   5731200
7501001  Starlette     104  201  315  290  259  326  185  92   207  292       2271   4   5906400
8606101  Ajisai        162  403  416  555  451  566  324  231  343  434       3885   4   10130400