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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 16 Sep 23:53:25 UTC 2021

   Satellite     Days: 16   15   14   13   12   11   10   9    8    7        TotalNP  p   Score

1801410  Snet1         0    0    0    0    0    0    0    0    0    0         0      3   0    
1801409  Snet4         0    0    0    0    0    0    0    0    0    415       415    3   16600
1304201  Kompsat5      0    0    0    0    0    17   0    0    0    580       597    4   53200
1306703  Swarmc        32   80   120  144  34   63   77   14   97   1312      1973   2   107660
1306702  Swarma        54   113  187  211  42   100  106  62   102  1593      2570   2   153780
1804701  Gracefo1      127  91   173  197  130  123  50   113  240  2683      3927   2   198980
1804702  Gracefo2      126  169  227  123  124  145  127  169  121  2672      4003   2   217120
2102213  Elsadchs      148  56   106  0    45   55   37   89   304  1270      2110   3   226800
0702601  Terrasarx     53   86   228  115  110  113  80   93   104  1992      2974   3   318280
1003001  Tandemx       57   65   203  131  134  134  62   189  86   2242      3303   3   335960
1807001  Icesat2       64   163  144  105  0    15   95   28   118  1134      1866   2   354180
1704205  Technosat     33   44   40   58   33   19   78   32   77   806       1220   3   373560
1306701  Swarmb        93   260  376  496  232  252  511  309  379  4564      7472   2   413900
1802001  Paz           162  121  201  203  123  226  207  190  411  3925      5769   3   550040
1602101  Compassi6b    0    4    0    0    0    0    0    0    0    26        30     5   595200
1001301  Cryosat2      82   126  247  183  111  133  213  162  274  3364      4895   2   707520
1803901  Sentinel3b    86   161  250  261  95   134  299  65   383  3665      5399   2   791880
1601101  Sentinel3a    97   147  249  279  111  143  282  113  173  4024      5618   2   807360
1300901  Saral         129  101  379  175  171  204  279  134  282  3236      5090   2   829200
2008601  Sentinel6a    130  229  422  405  207  211  356  325  481  5698      8464   2   1255680
1600201  Jason3        199  200  365  320  299  301  371  299  467  5506      8327   2   1264200
8900103  Etalon1       5    11   41   23   13   11   14   25   23   386       552    2   1600800
1200601  Lares         85   160  298  287  145  155  229  207  382  3402      5350   2   1683720
1808101  Hy2b          73   103  202  144  94   109  141  44   30   2372      3312   3   2044320
8903903  Etalon2       0    18   33   53   21   22   32   28   37   404       648    2   2067600
2104301  Hy2d          101  150  239  220  150  165  147  98   325  2954      4549   3   2885520
0304206  Larets        62   60   158  103  84   59   102  70   146  1325      2169   4   2965920
2006601  Hy2c          66   129  341  208  139  159  213  253  371  3356      5235   3   3202320
7603901  Lageos1       105  152  277  268  162  143  220  179  236  3513      5255   1   3263760
9207002  Lageos2       68   194  270  224  168  229  252  184  279  3384      5252   1   3314160
1802901  Beidou3m9     8    0    0    3    2    13   7    10   7    99        149    5   3350400
9306102  Stella        85   99   154  105  87   134  109  120  157  2191      3241   4   3936480
1802902  Beidou3m10    2    0    0    8    14   11   14   6    2    122       179    5   3984000
1801802  Beidou3m3     5    5    0    6    3    3    8    8    20   170       228    5   4185600
1706902  Beidou3m2     6    1    0    0    7    29   12   4    24   167       250    5   5097600
1603401  Geoik2        72   133  231  178  183  171  165  211  234  3019      4597   4   5637120
1405002  Galileo202    6    4    9    10   13   4    18   12   15   159       250    5   6076800
6503201  Beaconc       110  322  585  485  368  341  699  385  747  5374      9416   4   6433200
1507901  Galileo209    10   3    10   15   16   29   9    8    6    196       302    5   7881600
7501001  Starlette     101  163  317  210  189  321  299  261  318  4694      6873   4   7934880
1603002  Galileo210    3    9    33   13   13   15   18   10   9    273       396    5   9715200
8606101  Ajisai        200  232  494  369  300  284  293  348  484  7250      10254  4   11652960
1106002  Galileo102    13   11   18   33   38   29   24   30   22   392       610    5   15350400
1407501  Glonass134    20   23   50   23   15   17   44   16   32   310       550    5   16713600
1805301  Glonass138    7    10   48   50   24   22   18   23   14   450       666    5   16963200
1301901  Glonass131    10   12   33   32   18   43   65   10   22   422       667    5   17040000
1808601  Glonass139    16   20   61   27   24   45   34   32   45   506       810    5   21254400