We have received confirmation from NASA that we have been confirmed for time on the DSN (Deep Space Network) for two-way Doppler and ranging activities with the ISEE-3 spacecraft. This is being done so as to determine the location of ISEE-3 with great precision for navigation purposes. Based on this data we will conduct our course correction engine firing. We have moved that original firing date from 17 June to a window that currently covers 30 June and 2 Juy. As the DSN ranging data comes in that window will shrink. DSN ranging passes after the engine burn will help us calculate the result of that burn and the new trajectory that ISEE-3 is pursuing.
DSN opportunities have been identified for 18 & 22 June and 3, 4, 6 July. We will probably need to actually utilize less than half to a third of these opportunities. Among the dishes to be used will be DSS-24 at Goldstone, DSS-34 and DSS-45 at Canberra, and DSS-54 and DSS-65 at Madrid. You can watch live DSN activity at DSN Now. Over the next few days we will be configuring ISEE-3 via Arecibo so as to be able to interact with DSN during this ranging activity.
Here are the DSN windows that have been identified. Again, we'll only be using a fraction of them since the DSN has lots of other customers.
2014-169T19:45:00.000 2014-169T22:00:00.000 100 015 DSS-24 ICE N083 1A1 2014-173T02:00:00.000 2014-173T04:15:00.000 100 015 DSS-24 ICE N083 1A1 2014-175T18:45:00.000 2014-175T21:10:00.000 100 015 DSS-54 ICE N083 1A1 A 2014-176T05:05:00.000 2014-176T07:10:00.000 100 015 DSS-34 ICE N083 1A1 A 2014-179T16:55:00.000 2014-179T19:35:00.000 100 015 DSS-65 ICE N083 1A1 A 2014-181T09:15:00.000 2014-181T12:45:00.000 100 015 DSS-65 ICE N083 1A1 A 2014-184T17:15:00.000 2014-184T20:45:00.000 100 015 DSS-65 ICE N115 1A1 A 2014-185T02:00:00.000 2014-185T04:00:00.000 100 015 DSS-34 ICE N083 1A1 A 2014-187T07:30:00.000 2014-187T11:45:00.000 100 015 DSS-65 ICE N083 1A1 A 2014-187T22:20:00.000 2014-188T02:15:00.000 100 015 DSS-45 ICE N083 1A1 A