    <block ref="OBS">
      <attitude ref="track">
        <boresight ref="SC_Zaxis" />
        <target ref="Callisto" />
        <phaseAngle ref="powerOptimised">
          <yDir>false </yDir>
        </phaseAngle>
      </attitude>
      <metadata>
        <comment>Track Power Optimised Callisto</comment>
      </metadata>
    </block>
