This was later revised to an arrival date of December 1973 in order to avoid conflicts with other missions over the use of the Deep Space Network for communications .
This was later to miss the period when Earth and Jupiter would be at opposite sides of the Sun .
This was later revised to an arrival date of December 1973 in order to avoid conflicts with other missions over the use of the Deep Space Network for communications , and to miss the period when Earth and Jupiter would be at opposite sides of the Sun .