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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:  Thu May 25 19:52:56 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    7    12   0    0    1    26   53   27   8         134    3   58680
0201201  Gracea        27   82   79   51   62   12   46   76   91   75        601    2   61960
0201202  Graceb        25   68   69   103  34   18   72   57   86   43        575    2   62060
1306703  Swarmc        30   134  108  69   167  65   130  145  145  132       1125   2   111140
1306702  Swarma        52   151  85   48   72   110  189  147  184  160       1198   2   112040
0702601  Terrasarx     14   75   120  172  90   78   151  143  230  203       1276   3   224200
1003001  Tandemx       15   59   111  243  80   84   270  87   142  211       1302   3   240240
1306701  Swarmb        196  277  333  331  194  232  396  316  505  356       3136   2   313120
0200901  Envisat       9    10   30   56   79   34   83   62   0    22        385    4   479040
1300901  Saral         79   180  185  184  154  152  209  195  195  255       1788   2   535680
0803201  Jason2        70   103  244  112  217  177  387  411  513  756       2990   2   666780
1503702  Compassms1    0    0    0    0    0    6    5    4    3    3         21     5   681600
1601101  Sentinel3a    98   224  185  257  177  167  256  399  322  324       2409   2   681660
1304201  Kompsat5      120  176  257  27   42   85   342  268  391  284       1992   4   715520
1001301  Cryosat2      85   195  307  265  223  238  237  382  255  268       2455   2   738960
1503701  Compassms2    4    0    0    0    2    0    4    8    12   3         33     5   1142400
8900103  Etalon1       15   6    22   17   18   21   33   40   33   18        223    2   1257600
8903903  Etalon2       10   23   18   18   22   26   23   28   43   37        248    2   1365600
1104301  Hy2a          79   92   137  169  61   97   155  178  135  127       1230   3   1511760
1200601  Lares         152  256  248  282  273  249  284  419  337  357       2857   2   1690680
1600201  Jason3        316  654  592  676  475  549  660  777  701  866       6266   2   1880880
1201801  Compassm3     0    0    0    0    16   4    13   19   10   5         67     5   2400000
0304206  Larets        83   100  62   116  72   41   115  176  148  123       1036   4   2439360
7603901  Lageos1       167  174  193  261  133  123  244  309  290  350       2244   1   2604720
9207002  Lageos2       130  190  221  270  217  175  303  302  322  279       2409   1   2852640
9306102  Stella        110  94   198  162  73   50   129  202  207  136       1361   4   3371520
6503201  Beaconc       132  339  326  264  340  271  410  508  304  409       3303   4   3936720
7501001  Starlette     161  222  358  312  187  144  274  421  279  266       2624   4   6566880
1405001  Galileo201    13   8    11   23   15   7    16   15   4    11        123    5   6758400
1405002  Galileo202    0    16   11   16   19   11   8    42   15   22        160    5   6940800
8606101  Ajisai        213  299  456  442  168  148  405  493  525  390       3539   4   8568000