The International DORIS Service July 2003 – December 2005 report
The International DORIS Service July 2003 – December 2005 report
The International DORIS Service July 2003 – December 2005 report
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IDS Report <strong>–</strong> <strong>July</strong> <strong>2003</strong> to <strong>December</strong> <strong>2005</strong> 18<br />
Figure 6. <strong>DORIS</strong> permanent network renovation<br />
At the end of <strong>2005</strong>, 47 out of 56 stations (in the permanent orbitography network) are<br />
considered to have good or excellent stability.<br />
5.3 THIRD GENERATION BEACONS DEPLOYMENT STATUS<br />
<strong>The</strong> deployment of the third generation beacons, which are intended to replace the first and<br />
second generation beacons still operating at many <strong>DORIS</strong> sites, has been interrupted for<br />
several months, after a serial failure on the 2 GHz channel was identified. Half of the beacons<br />
have been affected by this failure, and all units had to be sent back to the manufacturer in order<br />
to be retrofitted. <strong>The</strong> on-site replacement of defective units could only start in October, as<br />
retrofitted beacons became available.<br />
<strong>The</strong> evolution of the proportion of the three beacon types in the permanent network are shown<br />
on figure 7. <strong>The</strong> total number of beacons is lower than 58 because some of the stations whose<br />
closure is planned are not taken into account.
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