Fig. 5.


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Illustration of Earth-spacecraft communication and instrument activity. The deep space network at Earth consists of six antennas of which two (E-Station i and E-Station i+3) are operating simultaneously as displayed in the figure. Each Earth station is intermittently in contact with only three spacecraft, all spacecraft perform in-situ measurements whereas only two spacecraft also perform remote measurements (i.e. in-situ + imager), depending on their location.

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